I am getting issues with using a custom DNS resolver on my Magio Optic internet. Sometimes during the day for a short period of time ranging from a few seconds to a few minutes I cannot resolve any domain names via Cloudflare's 184.108.40.206 DNS as the DNS request times out. The issue also occurs when using OpenDNS and a VPN service's DNS servers, so the issue is not with 220.127.116.11's servers, but interestingly enough Google's 18.104.22.168 DNS works fine. I've tested on multiple devices and this is a network wide problem. 'nslookup telekom.sk' during an "outage": C:\Users\acer>nslookup telekom.sk DNS request timed out. timeout was 2 seconds. Server: UnKnown Address: 22.214.171.124 DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. *** Request to UnKnown timed-out Pinging 126.96.36.199 or OpenDNS works, as well as opening the 188.8.131.52 site in my web browser or any other IP address that has a website hosted on it. Here is a traceroute to 184.108.40.206: C:\Users\acer>tracert 220.127.116.11 Tracing route to 18.104.22.168 over a maximum of 30 hops 1 <1 ms <1 ms <1 ms 192.168.1.1 2 * * * Request timed out. 3 4 ms 4 ms 4 ms 22.214.171.124 4 * * * Request timed out. 5 12 ms 14 ms 10 ms 126.96.36.199 6 24 ms 24 ms 25 ms 188.8.131.52 7 10 ms 10 ms 10 ms 184.108.40.206 8 11 ms 11 ms 10 ms 220.127.116.11 9 10 ms 10 ms 10 ms 18.104.22.168 The traceroute looks the same during an "outage" and when everything is working correctly. This started happening sometime last year, before that I was using 22.214.171.124 and it worked well. I want to keep using 126.96.36.199. Any help would be appreciated.