Sip invites not making it from port to server?

I am trying to get up a SIP peer set up on a fresh asterisk install. When i start the CLI with verbose level 3 debug level 3 and sip debug on I do not see any sign of my calls. Yet I can see the messages hit the server using tshark and I can see that asterisk is listening on the port. I am really stumped, any suggestions?

Here is how I know messages are hitting and asterisk is listening:

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tshark -c1 host 10.3.2.2

Capturing on eth0
0.000000 10.3.2.2 -> 10.131.1.75 SIP/SDP 682 Request: INVITE sip:8600@10.131.1.75:5060 | , with session description
1 packet captured

netstat -nlp |grep 5060

udp 0 0 0.0.0.0:5060 0.0.0.0:* 1869/asterisk

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Internal firewall issue. I disabled the iptables service and it worked, had to have the sys admin change some rules