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Forum Discussion
SIP Alg on netgear routers
Hello, i have an IP Phone which does not recieve calls if the SIP Alg feature is enabled!!! Disabling it my ip phone can recieve calls! why it mess all when its switchen on?
SIP ALG was initially created to rewrite SIP packets on SIP port 5060 for the purpose of bypassing NAT and to not be as intrusive to the WAN network. Unfortunately, the rewriting of the packets can really cause problems especially since most VoIP providers have a system for SIP traffic that coincides with the SIP ALG. Basically, SIP ALG is bad and you want to do everything you can to bypass it and you can do one of 2 things (or both) 1) Disable SIP ALG in your router and 2) ensure your SIP Port is NOT on 5060. 5062 is what I use.
Also, make sure you are not double Natting. If you have a gateway AND an additional router, you are going to experience dropped calls and one-way audio. Your best bet is to only use a modem/router combo, or have your gateway bridged if you insist on an additional router.
Hope this helps.
Also, make sure you are not double Natting. If you have a gateway AND an additional router, you are going to experience dropped calls and one-way audio. Your best bet is to only use a modem/router combo, or have your gateway bridged if you insist on an additional router.
Hope this helps.