[OpenSIPS-Users] takes ages to register

[Ovidiu Sas]

Your REGISTERS are wired.  The first one has:
 - Call-ID: 1272116751-1496-ANDY-HOME at 192.168.10.13
 -  CSeq: 7

The next REGISTERs are part of the same Call-ID:
1272117145-4628-ANDY-HOME at 192.168.10.13 with increasing CSeq:
 - CSeq: 2
 - CSeq: 3
 - CSeq: 4

Only the last REGISTER (CSeq: 4) has the authentication headers and
therefor is accepted.  All the previous REGISTERs are without any
authentication credentials and therefor are challenged.