Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (2023)

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Description

This article gives a list of possible reasons causing throughput and performance issues in the SonicWall UTM appliance.

Each SonicWall UTM appliance series has different performance capabilities depending upon hardware specifications such as the CPU, the RAM or the Flash memory. It is recommended to check the particular device's capabilities before deciding that the performance related issues with the device is due to other factors.

You can find the information for your device on our Products Page.

Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (4) CAUTION: Please keep in mind that Speed testing sites are not an accurate depiction of network throughput. There are many factors that impact throughput before packets egress the SonicWall and make the return trip to the host that's performing the speed test. We strongly recommend examining your network as a whole when troubleshooting any throughput issues.

Resolution

Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (5) NOTE: Please perform the following steps in the order they're presented and test the throughput after each change.

Resolution for SonicOS 7.X

This release includes significantuser interface changes and many new features that are different from the SonicOS 6.5 and earlier firmware. The below resolution is for customers using SonicOS 7.X firmware.

Maximum Transmission Unit (MTU) of the WAN interface of the SonicWall

  1. Click on Network on the top Navigation Menu.
  2. Click System | Interfaces and Configure the WAN interface in question.

    The Maximum Transmission Unit size is the maximum size of an Ethernet frame being sent out through a network device. By default, this value is 1500 bytes but on xDSL and cable connections this value is often lowered to achieve a more stable connection and/or better performance. Common values are:1492 SDSL / 1460 ADSL / 1404 Cable. The MTU value is changed in increments of8 bytes. In the SonicWall WAN interface, this value is by default1500 bytes.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (6)


    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (7) TIP:Change the MTU size after determining the optimum MTU size in order to prevent unnecessary fragmentation. Refer to the following article to determine the optimum MTU value: How can I determine the MTU size of WAN interfaces to optimize throughput? | SonicWall

Fragment non-VPN outbound packets larger than this Interface's MTU

  1. Click on Network on the top Navigation Menu.
  2. Click on System | Interfaces and Configure the WAN interface in question. This checkbox setting works in tandem with MTU and is enabled by default. Having this option enabled is a Best Practice and will help ensure the SonicWall isn't forwarding packets with a larger MTU than can be used on the Interface.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (8)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (9) TIP:Enable this option under Network | System | Interfaces | WAN Interfaces | Advanced Tab

Ignore Don't Fragment (DF) Bit

(Video) How to troubleshoot a slow network

  1. Click on Network on the top Navigation Menu.
  2. Click on System | Interfaces and Configure the WAN interface in question.
  3. Enabling this option would fragment packets even though the Don't Fragment bit is set. By default, this option is unchecked in the WAN interface advanced settings and it is recommended to keep it unchecked.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (10)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (11) TIP:Enable this option under Network | System | Interfaces | WAN Interfaces | Advanced Tab

Link Speed settings of the WAN and other Interfaces

  1. Click on Network on the top Navigation Menu.
  2. Click on System | Interfaces and Configure the WAN interface in question.
  3. By default, all Interfaces on the SonicWall are set to automatically detect link speed. However, in certain deployments, the link speed settings should be manually set according to the device connected to the Interface. Please contact your ISP or device manufacturer of the device connected to the WAN Interface to find their best Duplex and Link Speed settings. Incorrect duplex settings of your WAN, for instance, would have the following harmful effects.
    • Unable to negotiate a connection with the ISP
    • An Inconsistent Internet connection
    • Dropped Packets
    • Slow Throughput

      Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (12)

      Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (13)TIP:

      Check with the manufacturer for all devices directly connected to a SonicWall Interface and make sure the Duplex and Link Speed Settings are optimally set. Change the relevant settings under Network | System | Interfaces | WAN interface | Advanced Tab.

Bandwidth Management

Make sure the Bandwidth Management is disabled on the LAN and WAN interfaces and on the access rules.

  1. To disable Bandwidth Management on the Interface, Click on Network | System | Interfaces (Edit LAN and WAN) | Advanced Tab.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (14)
  2. To disable Bandwidth Management on the Access Rules. Click on Policy | Rules and Policies | Access Rules | Configure access rule from LAN to WAN |Trafficshaping, make sure Bandwidth management is disabled.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (15)

Enable Fragmented Packet Handling in VPN Advanced Settings

  1. Click on Network on the top Navigation Menu.
  2. Navigate to IPsec VPN | Advanced.
  3. Enabling fragmentation (Enable Fragmented Packet Handling) would help SonicWall handle fragmented IPsec packets. This can affect SonicWall's WAN throughput if any VPN policies are configured and enabled, even if they aren't established.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (16)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (17) TIP:It is recommended to enable this option and leave the Ignore DF Bit option unchecked under IPsec | Advanced on the SonicWall GUI.

Allow Fragmented Packets in Access Rules

  1. Click on Policy in the top Navigation menu.
  2. Navigate to Rules and Policies | Access rules and configure the desired access rule.
  3. This option is enabled by default and the best practice would be to keep it enabled.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (18)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (19) TIP:Make sure that all Access Rules under Rules and Policies | Access Rules have the Allow Fragmented Packets Checkbox Enabled.

Check the Connections Monitor to determine whether hosts on the network are using a large number of connections

(Video) Real-Time Bandwidth Monitoring with a SonicWALL

  1. Click on Monitor in the top Navigation menu.
  2. Navigate to Tools and Monitors | Connections.
  3. If a host in the network is infected with malware it will often open, at random, hundreds or thousands of connections to the Internet or internal resources.
    The Connections displays real-time views of all connections to and through the SonicWall security appliance allowing you to find infected hosts and remove them from the network.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (20) TIP:Isolate the affected host and remove it from the network.

Set Name Resolution to None

  1. Click Device on the Top Navigation menu.
  2. Navigate to Log | Name Resolution. High traffic networks will result in high amounts of DNS queries for the SonicWall as it attempts to generate log entries. By default, the SonicWall will populate the DNS Address for log entries resulting fromSecurity Services, firewallAccess Rules, and the like.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (21)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (22) TIP:Change Name Resolution underDevice | Log | Name ResolutiontoNone.

Performance Optimized Security Services

  1. Click Policy on the Top Navigation menu.
  2. Navigate to Security Services | Summary.
  3. For throughput Best Practices we recommend disablingEnhanced Security. This will inspect and block packets who matchSignaturesmatchingMediumorHigh PriorityThreatprobability. BlockingLow Threat Probabilitytraffic will unnecessarilydroppackets such asICMPand is not recommended for most deployments.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (23)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (24) TIP:AlsoDisable Low Priority AttacksunderPrevent Allfor both Intrusion Prevention and Anti-Spyware.

Path Ping to a Remote Network

To help rule out or prove an issue with a device or network above the SonicWall you can usePath Ping. This command line utility will bothPingand track thelatencyon the route to a target destination, providing you feedback on if a particular hop is latent, packets are being incorrectly routed, etc.

Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (25) TIP:Perform a Path Ping to the network or IP Address that you're testing to.

https://technet.microsoft.com/en-us/library/bb490964.aspx

Physical Network

  1. If the above troubleshooting fails to yield an increase in throughput, it is often necessary to try removing the SonicWall from the physical network and retest the speeds. Increases in throughput when removing the SonicWall from the physical network are expected but it is important to have information on speeds with and without the SonicWall in place for further troubleshooting. It can also be beneficial to directly connect a host to the ISP handoff device and test for a throughput issue on the ISP side.
  2. Furthermore, we recommend doing an iPerf Test on the SonicWall to test for physical issues on the SonicWall's Interfaces. This requires that the SonicWall be taken out of thenetwork line temporarily in order to avoid involving other network devices that could alter the results.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (26) TIP:Remove the SonicWall from the physical network after getting a baseline of the network throughput. Test the throughput using the same tools and note the difference. While the SonicWall is out of the network, perform an iPerf Test:How to use iPerf to measure throughput on a SonicWall device? | SonicWall

Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (27) NOTE: Please perform the following steps in the order they're presented and test the throughput after each change.

Resolution for SonicOS 6.5

This release includes significantuser interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.


Maximum Transmission Unit (MTU) of the WAN interface of the SonicWall

(Video) Dell SonicWALL SNMP

  1. Click Manage in the top navigation menu.
  2. Click Network | Interfaces and opening the Interface in question.

    The Maximum Transmission Unit size is the maximum size of an Ethernet frame being sent out through a network device. By default this value is 1500 bytes but on xDSL and cable connections this value is often lowered to achieve a more stable connection and/or better performance. Common values are: 1492 SDSL / 1460 ADSL / 1404 Cable. The MTU value is changed in increments of 8 bytes. In the SonicWall WAN interface this value is by default 1500 bytes.
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (28)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (29) TIP: Change the MTU size after determining the optimum MTU size in order to prevent unnecessary fragmentation. Refer the following article to determine the optimum MTU value: Determining the MTU Value for Your Internet Connection.


Fragment non-VPN outbound packets larger than this Interface's MTU

  1. Click Manage in the top navigation menu.
  2. Click Network | Interfacesand opening the Interface in question.This checkbox setting works in tandem with MTU, and is enabled by default. Having this option enabled is a Best Practice and will help ensure the SonicWall isn't forwarding packets with a larger MTU than can be used on the Interface.
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (30)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (31) TIP: Enable this option underNetwork | Interfaces| WAN Interface | Advanced Tab.

Ignore Don't Fragment (DF) Bit

  1. Click Manage in the top navigation menu.
  2. Navigate toNetwork | Interfacesand opening the Interface in question.
  3. Enabling this option would fragment packets even though the Don't Fragment bit is set. By default this option is unchecked in the WAN interface advanced settings and it is recommended to keep it unchecked.
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (32)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (33) TIP: Disable this option underNetwork | Interfaces| WAN Interface | Advanced Tab.


Link Speed settings of the WAN and other Interfaces

  1. Click Manage in the top navigation menu.
  2. Click Network | Interfacesand opening the Interface in question.
  3. By default all Interfaces on the SonicWall are set to automatically detect link speed. However, in certain deployments, the link speed settings should be manually set according to the device connected to the Interface. Please contact your ISP or device manufacturer of the device connected to the WAN Interface to find their best Duplex and Link Speed settings. Incorrect duplex settings of your WAN, for instance, would have the following harmful effects.
  • Unable to negotiate a connection with the ISP
  • An Inconsistent Internet connection
  • Dropped Packets
  • Slow Throughput
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (34)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (35) TIP: Check with the manufacturer for all devices directly connected to a SonicWall Interface and make sure the Duplex and Link Speed Settings are optimally set. Change the relevant settings underNetwork | Interfaces| WAN Interface | Advanced Tab.

Bandwidth Management

  1. Click Manage in the top navigation menu.
  2. Navigate to Firewall Settings | Bandwidth Management.
  3. You can apply bandwidth management to both outbound and inbound traffic on the Interfaces associated with the WAN Zone. Enabling it entails entering the bandwidth values (in Kbps) available for the Interface. Bandwidth management will cause throughput degradation if incorrectly configured.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (36) EXAMPLE: If Bandwidth Management has been enabled on an Interface without specifying the bandwidth values, inbound and outbound traffic traversing that link will be throttled to the default values (384Kbps).
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (37)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (38) TIP: Disable Bandwidth Management if not required viaFirewall Settings | Bandwidth Managementon the SonicWall GUI.

Enable Fragmented Packet Handling in VPN Advanced Settings

  1. Click Manage in the top navigation menu.
  2. Navigate toVPN | Advanced Settings.
  3. enabling fragmentation would help SonicWall handle fragmented IPsec packets. This can affect the SonicWall's WAN throughput if any VPN policies are configured and Enabled, even if they aren't established.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (39)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (40) TIP: It is recommended to enable this option and leave the Ignore DF Bit option unchecked underVPN | Advanced Settingson the SonicWall GUI.

Allow Fragmented Packets in Access Rules

(Video) How to use Bandwidth Manager QOS to optimize voip traffic in Sonicwall

  1. Click Manage in the top navigation menu.
  2. Navigate toRules | Access Rules and configuring the desired access rule.
  3. This option is Enabled by default and the best practice would be to keep it enabled.
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (41)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (42) TIP: Make sure that all Access Rules underRules | Access Ruleshave the Allow Fragmented Packets Checkbox Enabled.

Check the Connections Monitor to determine whether hosts on the network are using large number of connections

  1. Click Investigate in the top navigation menu.
  2. Click Connections Logs.
  3. If a host in the network is infected with malware it will often open, at random, hundreds or thousands of connections to the Internet or internal resources. The Connections Monitor displays real-time views of all connections to and through the SonicWall security appliance allowing you to find infected hosts and remove them from the network.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (43) TIP:Isolate the affected host and remove it from the network. The Connection Monitor is available underInvestigatein the top navigation menu| Connection Logs.


Set Name Resolution to None

  1. Click Manage in the top navigation menu.
  2. Navigate toLog Settings | Name Resolution.High traffic networks will result in high amounts of DNS queries for the SonicWall as it attempts to generate log entries. By default, the SonicWall will populate the DNS Address for log entries resulting from Security Services, firewall Access Rules, and the like.
    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (44)

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (45) TIP: Change Name Resolution underLog Settings | Name ResolutiontoNone.


Performance Optimized Security Services

  1. Click Manage in the top navigation menu.
  2. Navigate toSecurity Services | Base Setup.
  3. For throughput Best Practices we recommend setting the Security Services Settings to Performance Optimized. This will inspect and block packets who match Signatures matching Medium or High Priority Threat probability. Blocking Low Threat Probability traffic will unnecessarily drop packets such as ICMP and is not recommended for most deployments.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (46) TIP: Change Security Services Settings underSecurity Services | Base SetuptoPerformance Optimized.AlsoDisable Low Priority AttacksunderPrevent Allfor both Intrusion Prevention and Anti-Spyware.

Path Ping to a Remote Network

  1. To help rule out or prove an issue with a device or network above the SonicWall you can use Path Ping. This command line utility will both Ping and track the latency on the route to a target destination, providing you feedback on if a particular hop is latent, packets are being incorrectly routed, etc.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (47) TIP: Perform a Path Ping to the network or IP Address that you're testing to.You can find out more about Path Ping by reading the linked Microsoft Technet Article.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (48)

Physical Network

  1. If the above troubleshooting fails to yield an increase in throughput, it is often necessary to try removing the SonicWall from the physical network and retest the speeds. Increases in throughput when removing the SonicWall from the physical network are expected but it is important to have information on speeds with and without the SonicWall in place for further troubleshooting. It can also be beneficial to directly connect a host to the ISP handoff device and test for a throughput issue on the ISP side.
  2. Furthermore, we recommend doing an iPerf Test on the SonicWall to test for physical issues on the SonicWall's Interfaces. This requires that the SonicWall be taken out of the network line temporarily in order to avoid involving other network devices that could alter the results.

    Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall (49) TIP: Remove the SonicWall from the physical network after getting a baseline of the network throughput. Test the throughput using the same tools and note the difference. While the SonicWall is out of the network, perform an iPerf Test:How to Use iPerf to Measure Throughput on a SonicWall.

Related Articles

  • What is DNS Doctoring and how to enable it on SonicWall?
  • DPI-SSL Troubleshooting
  • How can I configure Network Monitor probing through a specific path?

Categories

  • Firewalls > NSa Series > Networking
  • Firewalls > NSv Series > Networking
  • Firewalls > TZ Series > Networking

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FAQs

How does SonicWall control bandwidth? ›

Login to the SonicWall Management GUI. Navigate to the Manage > Security Configuration > Firewall Settings | Bandwidth Management page. Select radio-button Advanced under Bandwidth Management Type. Click on Accept to save changes.

How do I check my SonicWall Internet speed? ›

Click Manage in the top navigation menu. Click Network | Interfaces and opening the Interface in question. By default all Interfaces on the SonicWall are set to automatically detect link speed.

Can you run a speedtest on SonicWall? ›

net's speed test database stores information on millions of Internet connections. This tool can average connection speed for any Internet provider, country or city in the world. So you can easily average speed test results, compare maximum speeds and research logged results for Dell SonicWALL.

How do I find my MTU size on SonicWall? ›

Description
  1. As a workaround you can use the PING command at the Operating System prompt to determine the MTU size through your network:
  2. NOTE: reduce buffer size by 8 byte (1472-8 = 1464, 1456, 1404, etc.) ...
  3. Explanation of parameters: The switch -f (minus sign followed by lowercase F) indicates "do not fragment".

How do I set bandwidth limit on Sonicwall firewall? ›

  1. Navigate to Network | Interfaces and on the right side of the screen open the configure menu for the desired WAN Interface.
  2. Navigate to Advanced tab an Enable both the Ingress and Egress Bandwidth Limitation checkboxes.
  3. Input the Ingress and Egress Speeds of your WAN in Kbps. ...
  4. Click OK .

How is bandwidth managed? ›

Bandwidth management is the process of measuring and controlling the communications (traffic, packets) on a network link, to avoid filling the link to capacity or overfilling the link, which would result in network congestion and poor performance of the network.

How can I speed up my SonicWall? ›

Resolution
  1. Monitoring. ...
  2. Turn off unnecessary services on the SonicWall. ...
  3. Set the Link Speed Manually. ...
  4. Maximum Security and Performance Optimized settings under Security Services settings. ...
  5. Change the Maximum Transmission Unit (MTU) Size on the WAN interface. ...
  6. Check the specifications of the SonicWall.

How do I ping an IP address with SonicWall firewall? ›

PINGing a device from the Sonicwall

A useful step when troubleshooting network issues can be to ping a device from the firewall. To do this, go to System, Diagnostics, and select the Ping Diagnostic Tool from the menu. Enter the DNS name or IP address of the device to ping and click Go.

What is WAN acceleration SonicWall? ›

The WAN Acceleration service allows you to accelerate WAN traffic between a central site and a branch site by using Transmission Control Protocol (TCP), and Windows File Sharing (WFS). The Dell SonicWALL WXA series appliance is deployed in conjunction with a Dell SonicWALL NSA series appliance.

How does SonicWall check network traffic? ›

Resolution for SonicOS 6.5
  1. Login to the firewall as Administrator.
  2. Navigate to AppFlow | Flow Reporting | Settings.
  3. Ensure that the following are enabled. ...
  4. Click Accept. ...
  5. Navigate to Dashboard | Real-Time Monitor to check which applications are using the most bandwidth.
  6. Also navigate to Dashboard | AppFlow Monitor.

How do I check my SonicWall memory usage? ›

Description
  1. Log in to SonicWall management from CLI. To see how to initiate a management session in CLI, please refer How to login to the appliance using the Command Line Interface (CLI).
  2. If the firmware on device is 5.8. x, type the command 'show memory' without quotes.
  3. If the firmware on device is 5.9. x or 6.1.

How do I check my Iperf bandwidth? ›

Symptoms
  1. Download the iperf utility. ...
  2. On the server that will be receiving data, open an elevated command window and run the following command: "iperf.exe –s –w 2m".
  3. On the server that will be sending data, open an elevated command window and run the following command: "iperf –c x.x.x.x –w 2m –t 30s –i 1s".
6 Oct 2021

What happens if MTU is too low? ›

The downside of a smaller MTU is that you have a certain amount data of consumed with packet headers and processing overhead dealing with more small packets.

What is best MTU size? ›

It is generally recommended that the MTU for a WAN interface connected to a PPPoE DSL network be 1492. In fact, with auto MTU discovery, 1492 is discovered to be the maximum allowed MTU. However, having an MTU of 1452 is most optimal.

What is the standard MTU size? ›

The normal or default MTU size typically used is 1500 bytes and for a larger MTU size 9000 bytes tends to be the common choice. While 9000 bytes is typically used as a large MTU size, it also spans more than two physical 4K pages of memory.

How do I limit bandwidth per user? ›

To limit bandwidth on devices on your network:
  1. From the main menu, select Advanced and then select Traffic Control.
  2. Select Add to add a new client rule. ...
  3. Enter your computer's IP address in the Source IP field, and the bandwidth limit (a portion of your overall bandwidth) in the Up Floor and Down Floor fields.
14 Jul 2020

What is bandwidth in firewall? ›

This is the volume of traffic that can pass through the firewall at any one time.

What restricts bandwidth? ›

Network congestion

ISPs can also throttle your internet when certain types of data, like large files or torrents, take up too much bandwidth. Your ISP can restrict your bandwidth, even if you already paid for it, simply because your activity is straining their network.

Who controls bandwidth? ›

The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute (47 U.S.C. § 151 and 47 U.S.C. § 154) to regulate interstate communications by radio, television, wire, satellite, and cable.

How do I control bandwidth allocation? ›

How??
  1. Step 1: Go to IP address: 192.168. ...
  2. Step 2: Click the Advanced tab then QoS. ...
  3. Step 3: Check on your control panel the devices that are currently connected on your router. ...
  4. Step 4: Know your device's Physical Address or also known as MAC Address. ...
  5. Step 5: Setting up Upload and Download bandwidth limit.

How do I turn on DPI in SonicWall? ›

Login to the SonicWall Management page.
...
  1. Navigate to the Security Services | Anti-Spyware page.
  2. Select "Enable Anti-Spyware" check box if it's not already enable.
  3. Select "Enable Inspection of Outbound Spyware Communication" check box.
  4. Click on Accept button.

What is a SonicWall used for? ›

SonicWall firewalls allow you to identify and control all of the applications in use on your network. This additional control enhances compliance and data leakage prevention by identifying applications based on their unique signatures rather than ports or protocols.

How do I ping an IP address multiple times? ›

How to Constantly Ping in a CMD Prompt
  1. Open the Windows Run box by pressing the Windows key and the letter R. Video of the Day.
  2. Type "ping " followed by the IP address to ping. ...
  3. Type "-t" after the IP address to run the ping continuously or " -n x", replacing x with the desired number of packets to be sent.

How do I access diag page SonicWall? ›

The Diag page can be reached by typing in the LAN IP of the SonicWall in the browser, with a IP/sonicui/7/m/mgmt/settings/diag at the end.

What is Wxa in SonicWALL? ›

What is WAN Acceleration? The SonicWALL WXA series appliances deployed in one-arm mode with SonicWALL NSA/TZ series appliances allow network administrators to accelerate WAN traffic using Transmission Control Protocol (TCP) and Windows File Sharing (WFS) between a data center and a remote site.

How does a WAN accelerator work? ›

WAN acceleration remediates network congestion and latency by implementing bandwidth preservation techniques such as compression, caching, data deduplication, and image optimization.

How do you tell what device is using the most bandwidth? ›

The most accurate way to monitor the bandwidth used by devices on your network is to head to the router. All devices connect to your router. In the router's settings, you'll be able to work out the data usage information for each device by using their IP and MAC addresses.

How do you check which computer is using the most bandwidth? ›

In Windows 10, open the Settings app and type “Data usage” into the search form to get to Win 10's overview of your network status, then click or tap “Data usage” to see which apps have used the most bandwidth over the past 30 days.

How do I see traffic logs in SonicWall firewall? ›

The SonicWall network security appliance maintains an Event log for tracking potential security threats. To view system events, navigate to Monitor > Logs > System Logs page. The System Log table provides numerous settings to allow you to navigate, view, and export results.

Is throughput the same as bandwidth? ›

Bandwidth and throughput both indicate network performance. The terms are often used together, but bandwidth refers to capacity, while throughput details how much data actually transmits. Bandwidth and throughput are two terms related to network performance.

Can iPerf measure latency? ›

iPerf can also be used to determine the quality of a link or test latency, jitter and datagram loss. This article explains how to use iPerf and iPerf3 to test LAN and WLAN speeds.

Is iPerf a TCP or UDP? ›

Iperf uses TCP by default. TCP has built in congestion avoidance.

How does SonicWall check network traffic? ›

Resolution for SonicOS 6.5
  1. Login to the firewall as Administrator.
  2. Navigate to AppFlow | Flow Reporting | Settings.
  3. Ensure that the following are enabled. ...
  4. Click Accept. ...
  5. Navigate to Dashboard | Real-Time Monitor to check which applications are using the most bandwidth.
  6. Also navigate to Dashboard | AppFlow Monitor.

What is bandwidth in firewall? ›

This is the volume of traffic that can pass through the firewall at any one time.

How do I limit bandwidth per user? ›

To limit bandwidth on devices on your network:
  1. From the main menu, select Advanced and then select Traffic Control.
  2. Select Add to add a new client rule. ...
  3. Enter your computer's IP address in the Source IP field, and the bandwidth limit (a portion of your overall bandwidth) in the Up Floor and Down Floor fields.
14 Jul 2020

How do I monitor SonicWall? ›

Resolution
  1. Navigate to Monitor at the top of the page.
  2. Navigate to Current Status | System Status, line Connections at System Information area displays the maximum number of network connections the SonicWall security appliance can support, the peak number of concurrent connections and the current number of connections.

How do you tell what device is using the most bandwidth? ›

The most accurate way to monitor the bandwidth used by devices on your network is to head to the router. All devices connect to your router. In the router's settings, you'll be able to work out the data usage information for each device by using their IP and MAC addresses.

How do you check which computer is using the most bandwidth? ›

In Windows 10, open the Settings app and type “Data usage” into the search form to get to Win 10's overview of your network status, then click or tap “Data usage” to see which apps have used the most bandwidth over the past 30 days.

How do I see traffic logs in SonicWall firewall? ›

The SonicWall network security appliance maintains an Event log for tracking potential security threats. To view system events, navigate to Monitor > Logs > System Logs page. The System Log table provides numerous settings to allow you to navigate, view, and export results.

How do I choose firewall throughput? ›

To estimate the capacity of the firewall we need to consider:
  1. Connectivity links to be connected, their throughput.
  2. Concurrent and sessions.
  3. Additional functions to be enabled: application control, SSL traffic inspection, web filtering, IPS, antivirus.

How do I check my Internet firewall usage? ›

Firewall Analyzer is a firewall bandwidth monitor software. It provides you (IT Administrators) an unique way to monitor the firewall bandwidth usage. Firewall Analyzer measures firewall bandwidth usage based on the analysis of logs received from different network firewalls.

Can a firewall bottleneck? ›

If your firewall cannot accommodate the traffic from a speed or user perspective, it will create a bottleneck that causes problems for your organization by impacting performance and user experience.

How do I control network bandwidth? ›

Set a Data Usage Limit in Windows 10
  1. Press Windows key + I to open Settings.
  2. Click Network & Internet.
  3. Beneath Network status, you'll see your different internet connections and how much data each has used in the last 30 days. ...
  4. Beneath Data limit, click Enter limit.

How do I give my device more bandwidth? ›

Bandwidth Strategy
  1. Use an Ethernet Connection. TIP #1: Use an Ethernet Connection. ...
  2. Disable Automatic Backups. TIP #2: Disable Automatic Backups. ...
  3. Reduce WiFi-Connected Devices. TIP #3: Reduce WiFi-Connected Devices. ...
  4. Change the WiFi Band. TIP #4: Change the WiFi Band. ...
  5. Turn Down The Quality. ...
  6. Reset Your Router. ...
  7. Try a New Router.

How do I control bandwidth allocation? ›

How??
  1. Step 1: Go to IP address: 192.168. ...
  2. Step 2: Click the Advanced tab then QoS. ...
  3. Step 3: Check on your control panel the devices that are currently connected on your router. ...
  4. Step 4: Know your device's Physical Address or also known as MAC Address. ...
  5. Step 5: Setting up Upload and Download bandwidth limit.

How does SonicWall detect active VPN connections? ›

Answer: The SSL VPN > Status page displays a summary of active NetExtender sessions, including the name, PPP IP address, physical IP address, login time, length of time logged in and logout time. NOTE: In 6.5. x.x Version, you can find the SSL VPN session under MONITOR|User Sessions|SSL- VPN Sessions.

How do I enable SNMP on SonicWall? ›

Enable SNMP and configure SNMP parameters
  1. Login to the SonicWall management GUI as admin.
  2. Click on DEVICE, navigate to Settings | SNMP.
  3. Check the box Enable SNMP, click on Accept.
  4. Click Configure button and supply the parameters for SNMP or keep the defaults for general configuration.
  5. Click OK .

How do I run packet trace on SonicWall? ›

Resolution for SonicOS 6.5
  1. Login to the SonicWall Management GUI and navigate to Investigate | Packet Monitor.
  2. Ensure that the Packet Monitor is in Trace Off Status, then click Refresh. ...
  3. Click Configure (at bottom of the page)and setup the below tabs as necessary.
  4. Click OK and then click Start Capture.

Videos

1. Increasing Video Throughput Performance
(Firewalls.com)
2. How to monitor your network for free with Zabbix
(CryptoTech)
3. The new SonicWall NSa (from NSa2700 to NSa6700)
(Jean-Pier Talbot)
4. Network Throughput | Signal to Noise ratio | SNR | bandwidth vs throughput
(ISO Training Institute)
5. Customer's firewall configuration review (first pass)
(Jean-Pier Talbot)
6. The effect of Latency and Bandwidth on Web Applications
(AppPerf)
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