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FireBrick SIP Configuration: Difference between revisions
→SIP and NAT
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In general we would never suggest using SIP with NAT for this reason, and it is partly why the FireBrick itself includes a full back to back SIP gateway allowing SIP registrations in and out and a-law RTP via the
FireBrick. Used in this way it can avoid any NAT issues, but does specifically need configuring to meet your needs.
Having said this, the a FireBrick acting as a SIP server that itself is not behind NAT will try to cope with SIP clients that are behind NAT. This means that in many cases if there are SIP phones behind NAT than they may well work when registering against the FireBrick.
= Prioritising VoIP Traffic=
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