If you’ve ever tried to monitor telnet or HTTP traffic to a specific IP address with Wireshark (or more likely the loopback for localhost) you’ll have been frustrated by the various packets that have nothing to do with what you want. Wireshark issues seem particularly difficult to troubleshoot via Google so more as a reminder to myself, this is a filter that will only display telnet communications from a specific IP:

(telnet) && ip.src==172.14.13.123