Telnet IP/port - Testing for connectivity question
Posted on 2016-07-25
I'm trying to install some timeclocks at a site, and the clock is having connectivity issues. I'm thinking it's the clock because we've already installed 15 of them at different sites, but need to confirm why its the clock. This switch is sitting behind a firewall and needs to go out the internet into the vendor's server in their DMZ (18.104.22.168, port 443).
I did a telnet 22.214.171.124 443 from the switch and get the following output:
Core_Switch>telnet 126.96.36.199 443
Trying 188.8.131.52, 443 ... Open
Does this telnet test prove that the routing is good from my switch out to their server and back?
Another question: If I see traffic leaving my FW, but no hits on return traffic, what are some possible root causes?