05/25/18 22:58 PM  

Optimizing the Dell SonicWALL SOHO router to deal with QoS

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SummaryInstructions for optimizing the Dell SonicWALL SOHO router to deal with QoS/ call-quality.
Details
The Dell SonicWALL SOHO router can be configured to open ports, prioritize voice traffic and set minimum bandwidth for the RingCentral VoIP service. Follow the instructions below to configure your SonicWALL firewall.

NOTE: Based on available ISP bandwidth of 10Mbps/10Mbps (download/upload); accounting for 10 concurrent calls, adjust your numbers accordingly.  1 call requires approx. 90Kbps download/upload. Using 100Kbps in sample below for ease of calculation.
 

1. Access the firewall's interface

Step 1: 

Enter the firewall's IP address in the address bar of your web browser.

NOTE:   To check your firewall's IP address, refer to your firewall's documentation or contact the manufacturer for support.

Step 2: 

Enter the firewall's username and password.  Click OK.

NOTE:  The default username and password is admin.
 

2. VoIP Settings 

Step 1:

Go to VoIP > Settings

Step 2:

Check Enable Consistent NAT, uncheck/disable everything else.

Step 3:

Click  Accept to save the settings.
 

3. Firewall Settings 

Step 1:

Go to Firewall Settings > BWM.

Step 2:

Under Bandwidth Managment Type, select Global.

Step 3:

Under Priority, disable EVERY category, except Medium
 
Set Medium values to:
Guaranteed : 30%
Maximum / Burst: 50%

Enable Realtime and set values to:
Guaranteed : 70%
Maximum / Burst: 100%

Step 4:

Click Accept to save the settings.
 

4. Network

Step 1:

Go to Network > Interfaces > X1 (WAN)

Step 2:

Under the General tab, click the Configure icon (on far right).

Step 3:

Go to Advance > Link Speed, and then set to Auto Negotiate (UNLESS there's a need to set it to something specific).

Step 4:

Under Bandwidth Management set the following:
 
• Check the tickbox next to Enable Egress, and set Interface Egress Bandwidth to match the available bandwidth.
• Check the tickbox next to Enable Ingress, and set Interface Ingress Bandwidth to match the available bandwidth.

Step 5:

Click OK to save the settings.

Step 6: 

Under Network on the left side of the page, go to Address Objects.

Step 7:

Click Add under Address Objects.
 
Name: RCFullRange1
Zone Assignment: WAN
Type: Network
Network: 199.255.120.0
Netmask: 255.255.252.0
Click Add

Name: RCFullRange2
Zone Assignment: WAN
Type: Network
Network: 199.68.212.0
Netmask: 255.255.252.0
Click Add

Name: RCFullRange3
Zone Assignment: WAN
Type: Network
Network: 104.245.56.0
Netmask: 255.255.248.0
Click Add 

Name:
 RCFullRange4
Zone Assignment: WAN
Type: Network
Network: 185.23.248.0
Netmask: 255.255.252.0
Click Add

Name:
RCFullRange5
Zone Assignment: WAN
Type: Network
Network: 103.44.68.0
Netmask: 255.255.252.0
Click Add

Name:
RCFullRange6
Zone Assignment: WAN
Type: Network
Network: 208.87.40.0
Netmask: 255.255.252.0
Click Add

Name:
RCFullRange7
Zone Assignment: WAN
Type: Network
Network: 192.209.24.0
Netmask: 255.255.248.0
Click Add

Step 8:

Click Add Group. Name the group RCFullRNGGp and then add RCFullRange1RCFullRange2, RCFullRange3, RCFullRange4RCFullRange5, RCFullRange6 and RCFullRange7 to the Group. Use the arrows in the box to move the highlighted information from left to right, then click OK

Step 9:

Still under Network on the left side of the page, go to Services.

Step 10:

Click Add under Services, and then add the following:
 
Name: RC1
Protocol:  UDP
Port Range: 1000-65535
Sub type: none
Click Add
 
Name: RC2
Protocol:  TCP
Port Range: 5060-6000
Sub type: none
Click Add
 
Name: RC3
Protocol:  TCP
Port Range: 80-80
Sub type: none
Click Add
 
Name: RC4
Protocol:  TCP
Port Range: 443-443
Sub type: none
Click Add
 
Name: RC5
Protocol: UDP
Port Range: 123-123
Sub type: none
Click Add
 

Step 11:

Still on Services under Service Groups, click Add Group, to add the services to a groupName the group RingCentral, and then highlight RC1 through RC5. Use the arrows in the box to move the highlighted information from left to right. Click OK.
 

5. Access Rules 

Step 1:

On the left side of the page, go to Firewall > Access Rules.

Step 2:

Click Add to add the rule for LAN-to-WAN and WAN-to-LAN.

WAN > LAN

• General tab
Action: Allow
From Zone: WAN
To Zone: LAN
Service: RingCentral
Source: RCFullRNGGrp
Destination: Any
Users Allowed: All
Schedule: Always on
Check Enable Logging
Check Allow Fragmented Packets
Click Add

LAN > WAN

• General tab
Action: Allow
From Zone: LAN
To Zone: WAN
Service: RingCentral
Source: Any
Destination: RCFullRNGGrp
Users Allowed: All
Schedule: Always on
Check Enable Logging
Check Allow Fragmented Packets
Click Add

Step 3:

Click the edit button User-added image on both the LAN-to-WAN and WAN-to-LAN settings for RCFullRNGGrp, and go to the Ethernet BWM tab.

Ethernet Bandwidth Management
Check the box next to Enable Outbound Bandwidth Management, and set the Bandwidth Priority to Realtime. 
• Check the box next to Enable Inbound Bandwidth Management, and set the Bandwidth Priority to Realtime.
 

Step 4:

Go to the QoS tab.

DSCP Marking Settings
• DSCP Marking Action: Explicit
• Explicit DSCP Value: 46 - Expedited Forwarding (EF)
 

Step 5:

Click OK to save.  
 

See also:

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