I've installed FreeSWITCH on a clean CentOS 6 server. No errors etc. It startup fine, again without any errors. But when I try to connect a SIP client to the sample extension 1000 (or any other) I get a timeout. When I run netstat -tnulp | grep "freeswitch" I get: tcp 0 0 83.221.133.18:5080 0.0.0.0:* LISTEN 1167/freeswitch tcp 0 0 83.221.133.18:5060 0.0.0.0:* LISTEN 1167/freeswitch tcp 0 0 127.0.0.1:8021 0.0.0.0:* LISTEN 1167/freeswitch tcp 0 0 2001:1448:246:9f47:216:5060 :::* LISTEN 1167/freeswitch udp 0 0 83.221.133.18:5080 0.0.0.0:* 1167/freeswitch udp 0 0 83.221.133.18:5060 0.0.0.0:* 1167/freeswitch udp 0 0 2001:1448:246:9f47:5060 :::* 1167/freeswitch In fs_cli, when I run sofia status profile external, I get: Name external Domain Name N/A Auto-NAT false DBName sofia_reg_external Pres Hosts Dialplan XML Context public Challenge Realm auto_to RTP-IP 83.221.133.18 SIP-IP 83.221.133.18 URL sip:mod_sofia@83.221.133.18:5080 BIND-URL sip:mod_sofia@83.221.133.18:5080 HOLD-MUSIC local_stream://moh OUTBOUND-PROXY N/A CODECS IN G7221@32000h,G7221@16000h,G722,PCMU,PCMA,GSM CODECS OUT PCMU,PCMA,GSM TEL-EVENT 101 DTMF-MODE rfc2833 CNG 13 SESSION-TO 0 MAX-DIALOG 0 NOMEDIA false LATE-NEG false PROXY-MEDIA false AGGRESSIVENAT false STUN-ENABLED true STUN-AUTO-DISABLE false CALLS-IN 0 FAILED-CALLS-IN 0 CALLS-OUT 0 FAILED-CALLS-OUT 0 When I try to connect and run tshark -f "port 5060" I get: 0.000000 96.224.14.164 -> 83.221.133.18 SIP Request: REGISTER sip:83.221.133.18 3.997431 96.224.14.164 -> 83.221.133.18 SIP Request: REGISTER sip:83.221.133.18 ... I've setup FreeSWITCH on other CentOS 6 distro's and Ubuntu, without any problem. This one I cannot figure out though. Can anyone help?