SIP ALG Configuration

Hi Paco GP,

You can insert/update/delete SIP headers using iRules.

You can write a mini-SIPProxy functionality in F5 by doing the following
a) Virtual server with SIP Profile
b) Add iRule to virtual server which does the following
   i) Add Via header on receiving request/ remove Via header during response
   ii) For REGISTER request update Contact header with F5 NAT IP and on receiving 200 OK for REGISTER you may have to change the Contact header

Following SIP events are triggerred

1) SIP_REQUEST

2) SIP_REQUEST_SEND

3) SIP_RESPONSE

4) SIP_RESPONSE_SEND

You can insert SIP header using command

SIP::insert Via "actual SIP header content"

Hopes this help. You have to understand how F5 does connection mapping for SIP and how request are routed.

Thanks

Syed Nazir