Hi Tata, Thank you for all your help. Although I didn't try on another machine your idea led me to uninstalling and reinstalling the SIP Server and now... Netstat -an shows: UDP [::]:5060 and I am able to register my IPv6 SIP UA! YES!! Thank you so much for your help. I really appreciate it. :D Mike

Hi Tata, Using TCP for SIP as well as HTTP both resulted in the TCP connection not opening. The SYN was always responded to with a RST, ACK. I did find a data point that might yield some clues using the netstat command. It shows that port 5060 is associated only with "... ::ffff:192.168.1.2 ...

Hi Tata,
I'm sorry for the delay. I will try that tomorrow.
Thanks for your help,
Mike

Hi Tata, I couldn't figure out how to attach a file to my forum post so I've provided a download link below. https://spirent.box.com/s/o8mte0vhycmyzxqczqd8feugv2n3kg3t This pcap shows an IPv4 UA successfully registering, then ping from the IPv6 UA to the SIP Server and vice versa, and finally the ...

Hi Tata, Thank you for the reply. Does the SIP UA send SIP packets to the port 5060 over IPv6? Yes the REGISTER packets are using UDP ports (src and dst) 5060. Can you execute the SIP UA on the same PC what the SIP Server is running? I do not have any other SIP UAs to try on the same PC. I will look ...

Hi snuyzm, thank you for your response. ------------------------------------------------------------ Here is what SIP Server -> System -> Status shows: ------------------------------------------------------------ Status Summary Status: Active Interface: 192.168.1.2 2001:db8:238:40:2:0:0:202 ...

1. Brekeke Product Name and Version: Brekeke SIP Server, 3.5.3.0/424 2. Java version: 1.8.0_86 3. OS type and the version: Windows 7 Professional, SP1 4. UA (phone), gateway or other hardware/software involved: Spirent TestCenter SIP emulation 5. Your problem: I am able to register IPv4 UAs but when ...