We started getting timeouts on some websites and general Internet slowdown. It seemed to get progressively worse.
We restart main router and all is fine for sometimes a day, sometimes an hour.
We narrowed it down to, it seems Mikrotik DNS proxy, but I did not go into depths as I have a network that was slow/down so we made some changes as workaround. I still have a case that is not behaving as expected unless I'm missing something.
The DNS proxy used here (10.1.1.100) was a MT but changed to Linux Named/Bind server since, but results are same.
The domain being looked up is a split-horizon domain set up on the server.
[admin@] /ip dns> pr servers: 10.1.1.100 dynamic-servers: allow-remote-requests: yes max-udp-packet-size: 512 query-server-timeout: 2s query-total-timeout: 10s cache-size: 2048KiB cache-max-ttl: 1w cache-used: 266KiB
Ethernet adapter Local Area Connection: IPv4 Address. . . . . . . . . . . : 192.168.0.2(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 <-SXT
However most other domains/hosts work, for some reason some requests are ignored.
Directly from PC to server:
C:\Users\User>nslookup www.true.co.za 10.1.1.100 Server: UnKnown Address: 10.1.1.100 Name: true.co.za Address: 126.96.36.199 Aliases: www.true.co.za
Also trying to ping hostname on SXT:
[admin@Ekkas] > /ping www.true.co.za invalid value for argument address: invalid value of mac-address, mac address required invalid value for argument ipv6-address while resolving ip-address: name does not exist
Anyone experienced something like this or have some pointers for me to look at?
No filter/mangle/nat on the SXT apart from masquerade. No other rules on hops between SXT and 10.1.1.100 (DNS server).