Disable ALG, but sometimes still need to place in DMZ mode or replace.ĭisable ALG (Advanced Setup > NAT > ALG > Uncheck SIP Enabled). Providers may have configuration files for these. For DDR2200 Cisco SIP ALG is disabled through a hidden page (/algcfg.html then disable). ![]() May still be issues with SIP NAT ALG (enabled by default). Even in DMZ/bridge mode issues remain.Ĭhange firewall to LOW setting. Increase length of UDP timeout.ĭisable firewall and place into DMZ mode to a different router.Īudio and registration problems. DMZ mode or replace.ĭisable ALG (SIP Protocol Handler > set to Disabled). Try disabling the software firewall as it causes registration issues for phones (unless phones are UDP port 5060). No way to disable the ALG configuration, which causes audio problems and sometimes registration failures. Non DD-WRT stock models and DD-WRT NXT (stripped down) Also any other DD-WRT versionĭD-WRT firmware is robust and has many features. Registration issues and intermittent audio. Best to DMZ to a compatible router.į5D, F6D, F7D, FDS, F9K Series (and others) 600 seconds) as otherwise this could cause NAT problems.Įnable SIP ALG for this device but expect audio issues. Also worth increasing UDP timeout period (e.g. Disable ALG and if still issues upgrade firmware.ĭisable ALG (Firewall > Firewall Rules > Custom FirewallAccess and then disable SIP rules). ![]() Check Advanced Settings > WAN > NAT Passthrough > SIP Passthrough and verify disabled. enable Telnet and then nvram set nf_sip=0 and then nvram commit and power cycle). Disable ALG (Telnet required for this on some firmware versions i.e. Do not recommend this device if you are using Polycom phones due to inability to change DNS servers. New version only as old versions you cannot disable the ALG configuration. Recommend changing firewall setting to LOW to improve stability for audio. Even in DMZ or bridge mode there are issues with this device. Some providers offer configuration details. Add Google DNS servers (8.8.8.8 and 8.8.4.4) if using Polycom phones. Set firewall to OFF or likely will have fax issues. For MI424 you may need to add QoS rules for the VoIP provider's PBX. If using Polycom phones, suggest adding 8.8.8.8 and 8.8.4.4 as DNS custom servers (i.e. Q2000, Frontier F2250, MI424 (hardware E or higher)ĭisable SIP ALG. Recommend DMZ mode and use a different router. Registration issues and no way to disable SIP ALG.Īudio issues. Always update the firmware to the latest version if you experience any VOIP issues with any router/firewall. Load DD-WRT firmware ( File:WRT54GL DDWRT Install Guide.doc), Standard BuildĪ more extensive Router Compatability list, but certainly not complete. Here is a link to a more current list of routers tested for SIP:ĭSL Modem Router Combination (For DSL ONLY) The list is by no means complete but it is provided for reference. Entries highlighted in green have been reported by our dealers to meet or exceed their needs. ![]() Yes, the customer has tried that, but since NAT is involved, the lack of SDP rewriting means that the media streams do not get routed correctly.īut I am specifically looking for people with experience of this particular product, rather than for general advice, as I am seeking support for my assertion that it has a specific bug that the vendor needs to acknowledge and fix.This list of routers have been found to be compatible with SIP PBXs. It should be possible to do it correctly. Maybe, but that doesn't mean the concept is flawed. > Just about every SIP ALG (Watchguard included) makes things worse or > So if anyone else has any experience of using this product, I'd be > accept there is a bug, despite my very detailed description of it. ![]() However, either they or WatchGuard will not > a bug in the ALG regarding the media port number it inserts into the > I have a customer doing just that, and I am 100% convinced there is > via the WatchGuard SIP Application Layer Gateway to an outside SIP service? > Has anyone here used Asterisk inside a WatchGuard firewall, talking > On 22 April 2014 16:24, Tony Mountifield wrote: For the past 12 years the advice has always been "Disable SIP ALG and let Asterisk do the NAT fixup itself" on any firewall, regardless of brand. I would be very surprised is anyone uses WatchGuard SIP ALG.
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