My ISP recently had a fibre cut and thereafter 188.8.131.52 and 184.108.40.206 DNS have not worked for me.
I have been in touch with my ISP and they say the DNS requests drop within the cloudflare network.
A network trace shows traffic drops at 220.127.116.11
f0:7c:c7:29:8a:5a 18.104.22.168 cloudflare.ixp.joburg ae3.115 none
Hi @alex120, we’re taking a look.
@alex120 would you be able to traceroute again?
Hello traced again from 22.214.171.124 and it fails at 126.96.36.199
Helo is it possible to get reverse trace to the IP 188.8.131.52?
Ok, so now it gets dropped in transit as well. The reverse path is different, it goes through AS37100, but can’t get a trace past that. We’ll try to restore the peering session and reach out to AS37662 to see if there’s an issue at the IXP.
3 ae-2-113.er-01-jnb.za.seacomnet.com (184.108.40.206) 10 0.509ms 0.278ms 0.625ms 0.115ms
4 ae-1.cr-01-jnb.za.seacomnet.com (220.127.116.11) 3 51.078ms 51.023ms 51.185ms 0.092ms
5 ce-0-0-11.cr-01-emg.za.seacomnet.com (18.104.22.168) 10 52.07ms 51.638ms 52.491ms 0.281ms
6 ce-0-0-1.cr-01-mba.ke.seacomnet.com (22.214.171.124) 10 51.214ms 50.762ms 51.545ms 0.334ms
7 xe-0-0-0-4.cr-01-nbo.ke.seacomnet.com (126.96.36.199) 10 53.974ms 52.021ms 54.963ms 1.017ms
8 xe-0-1-0.pp-01-nbo.ke.seacomnet.com (188.8.131.52) 10 51.001ms 50.944ms 51.133ms 0.064ms
9 *** 0 0ms 0ms 0ms 0ms
Could you possibly try other IPs? e.g. 184.108.40.206 or 220.127.116.11 (cloudflare-dns.com)
Also can you try if DNS over UDP or TCP work? Or if it is just ICMP? There are platform-specific debug commands in Have problems with 18.104.22.168? *Read Me First* - #9
Thanks for the reply. I get the same results with 22.214.171.124 or 126.96.36.199.
Let me reach out to my ISP with the trace you did and try DNS over UDP/TCP.
Will let you know the results I get.
Yes, it happens to some domains. But there are some other issues as well, for example you are using a shared IPS address. what happens there, we sometimes copy the temporary shared address. So, make sure to use the IP Address.
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