I’ve been tearing my hair out trying to get a Polycom phone (behind a NAT) to register to an * box behind a Cisco SIP ALG. With known good credentials configured on the phone and in *, I get 403 Bad Auth when trying to register. If I put the phone onto the same LAN as * it works fine without changing any authentication parameters whatsoever. If I make the secret blank (null) on the phone and *, it’s registers fine. An X-Lite softphone works fine, and I already have a Cisco 7960 working in the same scenario but no go with the Polycom (I’ve tried a few different firmware versions, currently up to 2.02).
I also have configured Polycoms behind NAT to configure to * that is not behind a SIP ALG many times without trouble…it’s just with the SIP ALG that I’ve hit this wall… I found this forum thread which seems to pinpoint the issue, but I’m not really understanding the suggested fix. Does anyone out there understand the MD5 challenge/response and URI stuff that can give me some clue what to do? HYPERLINK "http://forum.voxilla.com/asterisk-support-forum/sipura-asterisk-registration-failed-wrong-password-18730.html"http://forum.voxilla.com/asterisk-support-forum/sipura-asterisk-registration-failed-wrong-password-18730.html Thanks! mmastera No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.12.1/963 - Release Date: 8/20/2007 5:44 PM
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