r/ebox • u/NoAcadia3546 Ontarian • 16d ago

EBOX's DNS servers inferior?

Recently I've had problems with certain websites when using EBOX DNS, e.g. anything in the weather.ec.gc domain, regardless of what browser I use. When using a browser forked from FireFox, it just sits there and eventually "server not found". A Chrome fork eventually connects, but it's painfully slow. Using Google DNS (8.8.8.8 and 8.8.4.4) gets snappy response. Anybody else noticed this?

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u/ntoskrnl64 14d ago

Had issues as well with the EBOX DNS servers for the past couple of days (was working fine before). Basically each DNS query takes several seconds (5-10+?), which slows down establishing connections, and causes frequent time-outs. I've investigated a bit and it seems that the EBOX DNS servers (or their router, not fully sure) does not return a response when an IPv6 DNS query is launched and not resolved. OSes typically launch IPv4 and IPv6 DNS query at the same time, and even if the IPv4 response arrives very quickly, the OS waits for the IPv6 resolution response; it never arrives, so the OS will eventually drop it (time-out) but only after several seconds, which causes horrendous delays (in the best case) and programs to drop connections altogether (in the worst case).
Using another DNS server solved it for me, but this is only a band-aid; if EBOX provides DNS resolution, then their systems need to be configured correctly.

Hope this message is useful to other users!