Linux networking · Testing connectivity
Find the path MTU
Send a packet that must not be fragmented. 1472 bytes plus headers makes 1500. Reduce the size until it succeeds.
ping -c 3 -M do -s 1472 example.com
Official Linux networking documentation
More testing connectivity commands
- Check that a host answers
- Trace the path to a host
- Trace with live statistics
- Test whether a port is open
- Time each phase of a request
All testing connectivity commands · Linux networking cheatsheet