So, I have a node from one of our CDOT 9.1 clusters that all of a sudden can no longer reach the mail relay to send autosupport emails. I've checked DNS, IP routes, traceroute etc - all good - nothing has been changed on the filer, the partner node still sends emails fine.
"you'll need to try a telnet to port 25 mate - can't help otherwise" they say...
TELNET? if only we had something that easy!
Wait - tcp_client - that used to work in 7-mode...
Yes - set diag mode, ensure diag user is unlocked, connected to node shell and set diag mode here.
Issued command and got an bind error:
tcp_client 4 <source IP for e0M> 25 <mail relay IP address> 25 -c 1 -s 1024
bind failed: Can't assign requested address
I've tried every IP allocated to this node of the cluster - same error.
Does anyone have any suggestions as to what I'm doing wrong or an alternative to troubleshooting open port connectivity from a pesky filer node?