Firewall rules for DrayTek Vigor 2860ac
I have a DrayTek Vigor 2860ac dual-band router and I have put the three rules into the firewall according to the instructions in another thread, the first two to send all dns requests to OpenDNS and the last to block all other dns requests. However, if I enable the third (blocking) rule, some devices on my network can't connect to the router. My daughter's laptop and mobile phone work just fine, as does my Panasonic Bluray recorder and Epson printer, but my Amazon FireTV won't connect and neither will my PC or my son's PC. I've checked that I have input the settings exactly as shown in the screenshots and I can't find any errors. It seems strange that some devices will connect OK, while others won't connect at all. If I disable the third rule, everything connects just fine. Has anyone any idea what might be the problem?
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Can you post a link to this other thread?
Generally, if you block port 53 passthrough, you must ensure that the end user devices do not have any DNS server addresses configured which are not allowed by your firewall rule, because you do not want them being used.
Some devices working and some others not indicates that these not working devices have DNS server addresses configured which you block by your firewall rule. So, check and correct the network settings on these devices.
Also, if you force all DNS traffic to OpenDNS, why do you introduce another rule to block port 53? This looks rather redundant.
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