The recording part is cumbersome. On these systems there's hardly any writable disk space and I'm not sure if NFS or SMB client is built in. tcpdump is often a

The recording part is cumbersome. On these systems there's hardly any writable disk space and I'm not sure if NFS or SMB client is built in. tcpdump is often a quick alternative to capture just the packets I'm interested in in clear text. That requires knowing a little bit about the filter syntax.