[Blink] router configuration?
ag at ag-projects.com
Wed Feb 9 15:49:23 CET 2011
9 out 10 connectivity problems are SIP ALG related. The rest are firewalls that explicitly block SIP traffic.
Most if not all residential routers have nowadays a broken SIP-ALG inside. No manufacturer really understands SIP so they do not even acknowledge that they break things by adding such 'support' into their routers, forget about fixing their implementation that was completely un-necessary in the first place. All SIP providers have a NAT traversal solution in place that simply works. The only way to eradicate the SIP ALG plague is to mandate the usage of TLS for SIP transport in a future iteration of the SIP protocol specs. And the chance of this happening is close to zero...
On Feb 5, 2011, at 6:51 AM, Dean Willis wrote:
> On Jan 27, 2011, at 4:30 PM, Adrian Georgescu wrote:
>> Blink sends the requests out and it gets no replies back. Is your router or your provider that blocks the SIP requests. Google for SIP-ALG problem, if the problem is in your router you may be able to fix it by disabling the so called 'SIP support' in the router.
> But Philippe seems to have said that his other SIP client is working fine from the home network. Thus, some particular interaction between the router and Blink that is different than the interaction between the router and the other SIP client.
> Of course, it's; possible that the other client might be doing something strange to defeat the router ...
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