[Serusers] Weird register issue

[Jan Janak]

On 22-06-2005 18:17, Anthony Dean wrote:
> Weird issue, only with registers.  Sometimes when I start ser (and openser,
> same issue with both)
> my test phone (behind nat) will not register allways getting 401
> unauthorized back.  But wait a minute
> and it will register (without resetting ser or the phone).
> 
> Is this a built in feature or a bug (it only happens when I reset
> ser/openser after 60 seconds the 
> server and phone behave normally).

  SER generates a random string to "seed" nonce value in digest
  challenge. The random string is generated each time you restart SER.
  That means if a user agent sends credentials generated by SER before
  restart they will be not valid for restarted SER because the random
  string will be different.

  You can use secret parameter of auth module to change this behavior.
  If you specify the random string manually then random generator will
  not be used and digest credentials will be valid after restarts.

  The messages below are not related to the problem, because REGISTER
  message does not contain digest credentials.

    Jan.

> 
> Got me stumped as the configs on the phone and ser don't change.
> 
> REGISTER sip:XX.XX.XX.XX SIP/2.0.
> Via: SIP/2.0/UDP 192.168.10.25:5060.
> From: <sip:2959770500 at XX.XX.XX.XX;user=phone>;tag=1886287424.
> To: <sip:2959770500 at XX.XX.XX.XX;user=phone>.
> Call-ID: 147690828 at 192.168.10.25.
> CSeq: 1 REGISTER.
> Contact: Nathan Gross
> <sip:2959770500 at 192.168.10.25:5060;user=phone;transport=udp>;expires=60.
> User-Agent: Cisco-CP7905/1.02-040406A.
> Allow: ACK, BYE, CANCEL, INVITE, NOTIFY, OPTIONS, REFER, REGISTER.
> Content-Length: 0.
> 
> SIP/2.0 401 Unauthorized.
> Via: SIP/2.0/UDP 192.168.10.25:5060;rport=62686;received=YY.YY.YY.YY.
> From: <sip:2959770500 at XX.XX.XX.XX;user=phone>;tag=1886287424.
> To:
> <sip:2959770500 at XX.XX.XX.XX;user=phone>;tag=264d52ef5b2f408fc315ea210b15c82e
> .5681.
> Call-ID: 147690828 at 192.168.10.25.
> CSeq: 1 REGISTER.
> WWW-Authenticate: Digest realm="XX.XX.XX.XX",
> nonce="42b9e43447292eaaa08c9b86dcc1e23344ac3c6a", qop="auth".
> Content-Length: 0.
> 
> Thank You
> 
> Anthony Dean
> Network Design & Support
> Tristar Communications
> 
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