Operating system: CentOS Linux 6.8
When I set up ip6tables (on Webmin):
Webmin > Networking > Linux IPv6 Firewall
and I select the 5th option i.e. “Block all except SSH, IDENT, ping and high ports on interface: eth0,”
connecting to the server via SSH is failing over ipv6.
However, if I select the 4th option, or “Block all except SSH and IDENT on external interface: eth0,”
connecting to the server via SSH is successful over ipv6.
Why does the 5th option fail?