Firewall is responsible for restricting the traffic a computer can send and receive over the Internet. By creating a strict, locked-down firewall policy, user can easily manage the exact traffic allowed on their network. Further, you can enhance the security of your LAN by having a strict firewall security policy, which will allow you to manage the data that reaches network.
When you try to connect to a website, the computer will connect to the DNS server and retrieve the IP address for the entered website. If DNS lookup is disabled on your firewall, it will not be possible to connect to Web addresses and surf the Internet.
Follow these instructions to enable DNS lookup through a firewall:
1. Firstly, open your firewall’s option window, Web configuration interface or configuration file. If you are unable to find this, then refer to the firewall’s documentation for further information.
2. Change the setting in the firewall to allow traffic on port 53 for both UDP and TCP protocols. Depending on your firewall, make a separate rule for each protocol or single rule specifying “Both” protocols.
3. Allow traffic on port 53 for all computers on your network, as server computer also requires DNS look-ups.
4. You can also Restrict Internet traffic on port 53 to the IP addresses of your DNS server alone.
By following these instructions you will surely able to allow DNS lookup through a firewall. If still you are unable to do so, feel free to contact our Internet Security support team.
When you try to connect to a website, the computer will connect to the DNS server and retrieve the IP address for the entered website. If DNS lookup is disabled on your firewall, it will not be possible to connect to Web addresses and surf the Internet.
Follow these instructions to enable DNS lookup through a firewall:
1. Firstly, open your firewall’s option window, Web configuration interface or configuration file. If you are unable to find this, then refer to the firewall’s documentation for further information.
2. Change the setting in the firewall to allow traffic on port 53 for both UDP and TCP protocols. Depending on your firewall, make a separate rule for each protocol or single rule specifying “Both” protocols.
3. Allow traffic on port 53 for all computers on your network, as server computer also requires DNS look-ups.
4. You can also Restrict Internet traffic on port 53 to the IP addresses of your DNS server alone.
By following these instructions you will surely able to allow DNS lookup through a firewall. If still you are unable to do so, feel free to contact our Internet Security support team.
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