# Asterisk 1.8.2.3 NAT issue **URL:** \ **Category:** Asterisk Support\ **Created:** [February 17, 2011, 5:56pm UTC](https://community.asterisk.org/t/asterisk-1-8-2-3-nat-issue/34193 "2011-02-17T17:56:33Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/asterisk/original/2X/4/475d0c889911cfb84ac4881ad6df8b523e3f9105.png) [@system](https://community.asterisk.org/u/system)\ **Post date:** [February 17, 2011, 5:56pm UTC](https://community.asterisk.org/t/asterisk-1-8-2-3-nat-issue/34193/1 "2011-02-17T17:56:33Z")
SIP client behind NAT is not working. Asterisk is not behind NAT, but accessible only by dyndns. sip.conf: [general] ; Asterisk box at home sipdebug=no port=5060 bindaddr=0.0.0.0 externhost=dyndns externrefresh=180 localnet=192.168.1.0/255.255.255.0 context=general alwaysauthreject=yes dtmfmode=rfc2833 ;no directmedia directmediadeny=0.0.0.0/0 directmediapermit=192.168.1.0/16 allowtransfer=yes srtpcapable=yes register=\>0XXX [2015] ; Client behind NAT at workplace type=friend externhost=dyndns externrefresh=180 secret=passwd context=extern nat=yes directmedia=no qualify=yes host=dynamic dtmfmode=rfc2833 Any idea from someone who has 1.8 properly running? ---
**Author:** ![tardich](https://avatars.discourse-cdn.com/v4/letter/t/8c91f0/32.png) [@tardich](https://community.asterisk.org/u/tardich)\ **Post date:** [February 21, 2011, 3:55pm UTC](https://community.asterisk.org/t/asterisk-1-8-2-3-nat-issue/34193/2 "2011-02-21T15:55:03Z")
I have the exact same problem. It’s NO-IP un my case, but this has nothing else different. In my case, I can make a call without any problem. But, as soon as I’m receiving a call, I’m getting > [@](#): > > Got SIP response 400 “Bad Request” back from xxx.xxx.xxx.xxx on the server logs. And the message gets dropped in the voicemail immediately. Anyone?