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Author Topic: SIP ALG  (Read 8024 times)

blk1948

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SIP ALG
« on: November 16, 2008, 09:42:39 AM »
I read the manual on the SIP ALG setting which suggests that this setting "Allows devices and applications using VoIP (Voice over IP) to communicate across NAT."  Is a similar ALG possible in firmware which would allow VPN to communicate across NAT?
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Lycan

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Re: SIP ALG
« Reply #1 on: November 17, 2008, 08:59:23 AM »
Yes, they're labeled PPTP and IPSec.
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blk1948

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Re: SIP ALG
« Reply #2 on: November 17, 2008, 10:21:54 AM »
But do they communicate over NAT like the description for the SIP ALG states?
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funchords

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Re: SIP ALG
« Reply #3 on: November 26, 2008, 11:35:33 AM »
Quote from: blk1948 on November 17, 2008, 10:21:54 AM
But do they communicate over NAT like the description for the SIP ALG states?
SIP is a different standard, but the general concept is the same for all Application Layer Gateways -- undo the damage caused by NAT traversal. 
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