Hi All,

I recently ran into a problem where a Solaris server could not establish a TCP socket on port 2126. From a packet capture I see this (note: A is a Solaris server, B is a router):

1. A sends SYN to B
2. B sends SYN, ACK to A

Notice A (Solaris) does not acknowledge the SYN from B.

Due to the business impact of the problem, I had to reboot the server to fix the problem. That said, I want to know the next time the problem occurs, what can I do to get a root cause (ie before server reboot)?

Thanks in advance.