Show established TCP connections linux

Count connections per state ss -tan | awk 'NR>1{print $1}' | sort | uniq -c | sort -rn Traceroute with MTU discovery mtr --report --tcp --port 443 example.com Test MTU path ping -M do -s 1472 -c 3 8.8.8.8 Show iptables rules iptables -L -n -v --line-numbers Show nftables ruleset nft list ruleset