09-12-2007 09:04 AM - edited 03-14-2019 11:30 PM
I have a 827-4v that have a ADSL modem broke.I have a 837 that are a gateway of my network.The problem is that a sip-ua agent send a private IP of 827-4v for authenticate whit an external SIP server...like this :
CSeq: 3698 REGISTER
Contact: <sip:0861XXXXS@192.168.1.5:5060>
Expires: 3600
the sip-ua are configure in this mode :
authentication username 08611XXXX password XXXXXX
nat symmetric role passive
nat symmetric check-media-src
aaa username proxy-auth
retry invite 4
retry response 3
retry bye 2
retry cancel 2
registrar dns:voip.eutelia.it:5061 expires 3600
sip-server dns:voip.eutelia.it:5061
The 837 gateway router have a static NAT like this :
ip nat inside source static udp 192.168.1.5 5061 interface Dialer0 5061
ip nat inside source static udp 192.168.1.5 5060 interface Dialer0 5060
I have read every thing about a SIP NAT etc but I do know what I have to do!!!
09-18-2007 01:04 PM
sip:0861XXXXS@192.168.1.5:5060 was what was sent, however this is not a valid SIP address as SIP addresses are supposed to be in the form of user@host. Because it is an invalid address the phone most likely reuses the previous
contact info.
09-18-2007 02:21 PM
Thank you but I know and I write this!
The problem for me is a configuration of the 837 (the gateway of my network) for SIP transparent NAT.
This for give a chance at a 827-4v to keep a valid pubblic addres to send in authentication.
09-18-2007 03:13 PM
Which IOS do you have on the 837?
Do you have access to IOS downloads to upgrade to latest image ?
It should replace the private address with the public one.
09-19-2007 05:37 AM
The IOS is c837-k9o3sy6-mz.124-5b.bin
I have a smartnet for upgrade the latest IOS image.
I have just 1 pubblic address and is for 837.
The solution will be this ? : http://www.cisco.com/en/US/products/ps6441/products_configuration_guide_chapter09186a008071c4ba.html#wp1066574
the " Hosted NAT Traversal for Session Border Controller " .
If yes I can try to upgrade my flash and download the c837-k9o3sy6-mz.124-15.T1.bin IOS flash image that have this feature.
If not....I don't know what I have to do...may be use the 837 like a modem for 827-4V ?
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