SIP packets, like any other packet, has a header. This header has the standard IPv4 options, of which source address, source port, destination address and destination port are the most blindingly obvious ones. NAT is pretty well performed by most firewall boxes at tweaking these values and replacing them on traversal of the gateway, and putting things back for responses. No surprises here.
Click for Avast tech support phone number
The design is so that intermediate gateways can tack on their ‘Via’ headers and the call can be switched virtually between a chain of gateways, each one doing their bit. All well and good until you want to introduce NAT, as the ‘Via’ then has information for networks the destination cannot necessarily get to.
This patch, I think, does the necessary bits to update the payload to make the payload be corrected as it passes through a NAT.
So, this will probably start to mean that Asterisk people will no longer have to set local net definitions to be able to correctly operate their internal and external SIP connectivity behind their firewalls.
Till here if you require any technical support then you can contact Avast customer service number
No comments:
Post a Comment