I keep forgetting this simple syntax and hopefully this will come in handy. In Wireshark you can specify a capture filter to only log traffic to/from a specific IP address with:
I needed to use a capture filter because I was running captures on a low-spec server, and without a capture filter Wireshark eats up all the memory.
Related tip: Use nslookup to get the IP address that is resolved to. You would usually do this from the server itself as CDNs may send you to a different IP.