Can't access instance after setting up iptables rules
- For rules in the
OUTPUTchain you should specify the source port match (--sport), not the destination port (--dport). - Anyway
DROPpolicy in theOUTPUTchain isn't a common practice. - Read the iptables tutorial and example rule sets.
- To avoid of lost of the connection, better use
iptables-saveandiptables-applytools.