As ISP increase upload and download
speed available to our networks, we are constantly looking for ways to
take advantage of it. In this article we are going to share with you 7
tips that can help tweak your SonicWALL firewall to take advantage of
the extra bandwidth.
BEFORE YOU BEGIN
strongly recommend you back your firewall and export your settings
before making these changes. As with any tweaking make sure you have a
plan to undo or completely restore the firewall in the event it becomes
1.) WAN Fragmentation
> Interface > WAN > Advance Tab Enable "Fragment non-VPN
outbound packets larger than this Interface’s MTU" and disable "Ignore
Don’t Fragment (DF) Bit".
2.) Interface Speed
all interfaces in the SonicWALL are set to automatically detect link
speed. Under Network > Interface > WAN > try forcing the link
speed manually, which should be set accordingly to the device connected
to the interface.
3.) Bandwidth Management
Under Network > Interface > WAN > disable bandwidth management if not required.
4.) Packet Fragmentation
Enabled "Allow Fragmented Packets" in Access Rules. LAN to WAN (On the Default Allow Rule).
5.) Optimize for Performance
Under Security Services > Summary > change Security Services Setting to "Performance Optimized".
6.) Disable Resolution
Under Log > Name Resolution, Set the Name Resolution method to NONE.
7.) Limit Advertised Window
you login to the device on the Address Bar we have “http://(IP Address
of SonicWALL)/main.html”, Replace “Main.html” with “diag.html”, so it
should look like “http://(IP Address of SonicWALL)/diag.html” and Hit
Enter. On the Left Side Click on “Internal Setting” and On the Right
Side "Enable the checkbox “Enable enforcement of a limit on maximum
allowed advertised TCP window with any DPI-based service enabled” Set
the Value in the field below the checkbox to 256.