Asterisk SIP NAT solutions - voip-info.org

Asterisk SIP NAT solutions - voip-info.org: "Asterisk SIP NAT solutions
Asterisk, SIP and NAT

Asterisk can both act as a SIP client and a SIP server. Asterisk as a SIP client is configured with type=peer (or type=friend) in one or more client sections of sip.conf and, optionally, one or more register=> lines in the [general] section of sip.conf. Asterisk as a SIP server connects clients (SIP Phones) configured by specifying their own username, secret, etc. (and either type=peer or type=friend) in client sections of sip.conf.

Asterisk SIP channels in a NATed network can be generalized like this:



1. Asterisk as a SIP client behind nat, connecting to outside SIP Proxies
2. Asterisk as a SIP client behind nat, connecting to inside SIP proxies
3. Asterisk as a SIP server behind nat, clients on the outside connecting to Asterisk
4. Asterisk as a SIP server behind nat, clients on the outside behind a second NAT connecting to Asterisk
5. Asterisk as a SIP server behind nat, clients on the inside connecting to Asterisk
6. Asterisk as a SIP client outside nat, connecting to outside SIP proxies
7. Asterisk as a SIP client outside nat, connecting to inside SIP proxies
8. Asterisk as a SIP server outside nat, clients on the outside connecting to Asterisk
9. Asterisk as a SIP s"