# IAX not reachable but SIP reachable

**URL:** <https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622>\
**Category:** Asterisk Support\
**Created:** [January 15, 2008, 4:51am UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622 "2008-01-15T04:51:42Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![rnbguy](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@rnbguy](https://community.asterisk.org/u/rnbguy)\
**Post date:** [January 15, 2008, 4:51am UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622/1 "2008-01-15T04:51:42Z")

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why would iax2 not be reachable to the from the same server to the same server in which SIP is reachable?

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**Author:** ![smaikol](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@smaikol](https://community.asterisk.org/u/smaikol)\
**Post date:** [January 15, 2008, 1:02pm UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622/2 "2008-01-15T13:02:57Z")

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hi

control with netstat if your iax udp port is open or in the firewall(if you have one)

cheers  
smaikol

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**Author:** ![rnbguy](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@rnbguy](https://community.asterisk.org/u/rnbguy)\
**Post date:** [January 15, 2008, 11:04pm UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622/3 "2008-01-15T23:04:45Z")

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okay the strange thing ive noticed, is:

Server A is registering sip to Server B  
Server A is NOT registering iax to Server B

Server C is registering sip to Server B  
Server C is registering iax to Server B

Server C is registering sip to Server A  
Server C is registering iax to Server A

so theres a problem only with Server A registering iax with server B! this is so weird…

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**Author:** ![nejme.eddinne](https://avatars.discourse-cdn.com/v4/letter/n/b5a626/32.png) [@nejme.eddinne](https://community.asterisk.org/u/nejme.eddinne)\
**Post date:** [January 16, 2008, 11:21am UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622/4 "2008-01-16T11:21:14Z")

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Check the IAX account settings on A Server (password, ip…)

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**Author:** ![leon-tcs](https://avatars.discourse-cdn.com/v4/letter/l/3ab097/32.png) [@leon-tcs](https://community.asterisk.org/u/leon-tcs)\
**Post date:** [January 16, 2008, 11:27am UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622/5 "2008-01-16T11:27:04Z")

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please check the service port.  
if you can use ethereal, you could see if the server response any packet. Or you could debug on asterisk.

Leon  
[telecomchinasourcing.com](http://telecomchinasourcing.com)

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**Author:** ![rnbguy](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@rnbguy](https://community.asterisk.org/u/rnbguy)\
**Post date:** [January 16, 2008, 11:52am UTC](https://community.asterisk.org/t/iax-not-reachable-but-sip-reachable/18622/6 "2008-01-16T11:52:36Z")

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is okay turned out QoS on the firewall wasnt working correctly, once i disabled QoS it worked