VOIP NAT

最新推荐文章于 2021-10-13 08:56:31 发布

LBritney

最新推荐文章于 2021-10-13 08:56:31 发布

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分类专栏： VOIP 文章标签： documentation authentication extension 防火墙 server 通讯

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本文详细介绍了SIP协议与IAX2协议在网络电话系统中的应用及配置方法。针对SIP协议，需要设置5060端口用于指令传输，并开放10000-20000端口用于语音流；而IAX2协议则通过单一的4569端口同时传输指令和媒体流。此外，还提供了具体的配置步骤和注意事项。

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Voip-info.org: NAT and VOIP

Voip-info.org: Asterisk, SIP and NAT

SIP协议，采用5060端口来传递指令，10000-20000传递语音流，所有如果SIP客户端在防火墙或者内网就需要开放相应的端口，来通讯。

From Voip-info.org

On your router NAT/firewall, forward SIP ports 5060 - 5082 and RTP ports 8000 - 20000 to your * server IP address. Then edit the "rtpstart" value in rtp.conf - from rtpstart=10000 to rtpstart=8000 since 8000 is the default RTP port on x-lite phones. Also enter the same externip=xxx.xxx.xxx.xxx and localnet=xxx.xxx.xxx.xxx/xxx.xxx.xxx.xxx info from your sip.conf general settings into sip_nat.conf. Then in sip.conf under the remote extension account authentication settings add nat=yes, canreinvite=no . This should get it working flawlessly, it did it for me after much research and troubleshooting. This should mark the end of NAT/firewall issues with asterisk.

NOTE: Your WAN or externip address from your ISP is usually not permanent so in the case where it changes you will have to edit the "externip=" value in sip.conf general settings and sip_nat.conf to the new value or you can register with dynamic DNS (dyndns) to automaticaly update the value.

IAX2协议指令和媒体流都通过4569端口来传递，穿透能力比较强。

Voip-info.org: Asterisk NAT=yes documentation (sip.conf)

Voip-info.org: STUN