@TheKoder
Good that It works now.
@anav
Some settings in Netwatch ICMP have been changed in recent versions, and the documentation, Is partly missing and partly plain wrong.
I made - with a lot of assistance by Amm0 - a couple attempts to expand/elaborate on these, but didn't consider the accept-icmp-time-exceeded=yes , so thanks for having brought It up and tested.
Only for the record the thread where some other settings were discussed:
Netwatch UP threshold