Dear All
I have put my windows machine behind my centos firewall server with just one NIC. At now, the windows machine can ping 192.9.9.3 but cannot resolve valid url (like www.google.com). I have set DNS for it as well. Can you please let me know what is the missing step?
Thank you
Are you blocking port 53?
Sorry. How can it be checked out?
Maybe iptables -L can help u, iptables -L -t nat or netstat -lnptu. use canyouseeme.org perhaps your ISP block the port 53.
Please find attached the required log.
It is missing that from your firewall
iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT
Can you give more info about that box? Is it DNS, DHCP, FW for network?
Do you try a "dig 8.8.8.8" ?