[solved] Firewall blocking traffic on CentOS7: FORWARD_IN_ZONES, FORWARD_OUT_ZONES..

[Fli]

Some of your traffic is blocked on CentOS7+ and "iptables -L" shows strange lines you do not know?:


FORWARD_direct all -- anywhere anywhere
FORWARD_IN_ZONES_SOURCE all -- anywhere anywhere
FORWARD_IN_ZONES all -- anywhere anywhere
FORWARD_OUT_ZONES_SOURCE all -- anywhere anywhere
FORWARD_OUT_ZONES all -- anywhere anywhere
DROP all -- anywhere anywhere ctstate INVALID
...
FWDI_public all -- anywhere anywhere [goto]
FWDI_public all -- anywhere anywhere [goto]

Chain FORWARD_IN_ZONES_SOURCE (1 references)
target prot opt source destination

Chain FORWARD_OUT_ZONES (1 references)
target prot opt source destination
FWDO_public all -- anywhere anywhere [goto]
FWDO_public all -- anywhere anywhere [goto]

The"problem" is that likely the firewalld is used. One can solve it by removing it:


systemctl disable firewalld;yum install iptables-services -y;systemctl enable iptables;

now check iptables rules:


iptables -L

or you may clean iptables not to contain any rules:


iptables -F

if you are happy with iptables setup, then save the rules so it survive next reboot:


service iptables save