Hope you all are doing good
I have centos server 6.5 in softlayer cloud server, and configured the VNC server for RDP.
The RDP Session is working fine, I can able to see from any network.
But the problem when the server need to reboot that the my iptables rules are erased after rebooting I dont know why ?
Its erased my entries alone, but the default entries are there Please help out this.
iptables -I INPUT -p tcp -m tcp --dport 5901 -j ACCEPT
iptables -I INPUT -p tcp -m tcp --dport 80 -j ACCEPT
Always save the iptables after adding rules from commandline or directly placing in iptables file under /etc directory. So, that at boot time these entries will never erased and load at system startup.
# iptables service save
Below please find the good steps which needs to be followed for Firewall changes.
- Save the current Firewall rules to some file. (In case something goes wrong we can quickly revert the settings.
# iptables-save > /tmp/iptables
- Now edit the file /tmp/iptables and copy paste the below command for making the port public.
# iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
- The below command will write the new changes of iptables into the memory.
# iptables-restore < /tmp/iptables
- The below command will make the firewall changes permanent. After reboot also the new changes will not be lost.
# service iptables save
- Alternatively we can issue the below commands for making the ports public through terminal and we can save the iptables rules.
# iptables -I INPUT -p tcp -m tcp --dport 22 -j ACCEPT
# iptables -I INPUT -p tcp -m tcp --dport 80 -j ACCEPT