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SIP inspection Cisco asa 5505

Posted on 2011-03-24
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Last Modified: 2012-05-11
The problem with the incoming voice to sip phone behind cisco asa 5505. Network diagram is as follows:the asterisk is it in the DMZ for cisco asa 5505  in city A. Included static nat 5060 and included inspect SIP. Everything works. cisco asa 5505 have put in city B too, included  inspect SIP. But SIP phone did not work correctly (no incoming voice). SIP phone is in the inside network. If SIP phone get without cisco asa 5505, then everything works.
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Question by:RuslanMith
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by:Ernie Beek
ID: 35205015
Anything showing in the logs of the ASA?
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by:RuslanMith
ID: 35205611

Teardown UDP connection 13274 for outside:vakazanova-primary/0 to inside:rdp_host/5060
Teardown UDP connection 13273 for outside:vakazanova-primary/0 to inside:rdp_host/5060
Teardown UDP connection 13272 for outside:vakazanova-primary/0 to inside:rdp_host/5060
Teardown UDP connection 13271 for outside:vakazanova-primary/0 to inside:rdp_host/5060
Teardown UDP connection 13270 for outside:vakazanova-primary/0 to inside:rdp_host/5060
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by:Ernie Beek
ID: 35205624
So in city B the asterisk is in the DMZ as well?
I ask because I see the connections going from the outside to the inside (?)
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Author Comment

by:RuslanMith
ID: 35205647
No, asterisk is only city A in dmz behind ciscoasa1 and work perfect. Sip phone is city B in inside behind ciscoasa2 and not incoming voice. If SIP phone get without ciscoasa2 in city B, then everything works
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by:Ernie Beek
ID: 35205657
Looks like something is being blocked. In city B you also allowed the correct ports from the outside to the inside (the phone)?
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Expert Comment

by:shubhanshu_jaiswal
ID: 35208030
exclude SIP Inspection from the new firewall...
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Author Comment

by:RuslanMith
ID: 35229337
If disable inspect in the city B, then SIP phone didn't register to asterisk in the city A. But SIP phone register on any SIP ISP. If enable inspect SIP in the city B,  then I see strange logs in the city A.Instead 192.168.1.8  must Public IP. When problem? Logs
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by:Ernie Beek
ID: 35229806
Just remembered:
Check the sip.conf on the asterisk server to see if externip and localnet are defined you need to set those otherwise you get those strange logs.

So externip should be the public address of the sip server
externip = 80.80.80.80
and localnet the internal ip range the server is in:
localnet = 192.168.1.0/24

Let's see if that helps.
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RuslanMith earned 0 total points
ID: 35230536
Solved the problem. Should be included on cisco asa Inspect RTSP.
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by:Qlemo
ID: 35481687
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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