Google DNS Not Resolving

[Zertop]

Hi All,

I have a weird issue and was hoping a few of you could assist in testing. Currently, on seacom's network (via Level7), I am receiving no response back from Google's DNS servers (8.8.8.8, 8.8.4.4). Although I can access the servers and it seems routing is fine (see below), the server doesn't respond at all. Other DNS servers work fine. Could anyone please try resolve a domain using host or dig for these servers?

traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
 1  dlinkrouter (10.0.0.2)  2.173 ms  3.420 ms  3.481 ms
 2  196-201-232-113.level-7.co.za (196.201.232.113)  6.806 ms  6.944 ms  7.710 ms
 3  196-201-232-97.level-7.co.za (196.201.232.97)  5.774 ms  5.796 ms  5.819 ms
 4  196-201-232-53.level-7.co.za (196.201.232.53)  5.970 ms  5.996 ms  6.667 ms
 5  105.22.66.25 (105.22.66.25)  22.366 ms  22.409 ms  22.128 ms
 6  ce-0-3-0-0.cr-02-cpt.za.seacomnet.com (105.16.31.2)  26.810 ms ce-0-2-0-0.cr-02-cpt.za.seacomnet.com (105.16.30.2)  25.218 ms ce-0-3-0-0.cr-02-cpt.za.seacomnet.com (105.16.31.2)  22.463 ms
 7  xe-0-1-0-3.cr-01-jnb.za.seacomnet.com (105.16.11.89)  25.593 ms xe-0-0-0-9.cr-01-jnb.za.seacomnet.com (105.16.13.193)  20.733 ms xe-0-0-0-8.cr-02-jnb.za.seacomnet.com (105.16.9.181)  22.622 ms
 8  ae-4-0.pp-01-jnb.za.seacomnet.com (105.16.29.8)  19.513 ms ae-3-0.pp-01-jnb.za.seacomnet.com (105.16.28.8)  19.684 ms  23.183 ms
 9  72.14.194.70 (72.14.194.70)  21.154 ms  21.790 ms  21.061 ms
10  74.125.245.193 (74.125.245.193)  25.590 ms  18.945 ms 74.125.245.209 (74.125.245.209)  19.798 ms
11  172.253.65.251 (172.253.65.251)  19.738 ms 172.253.65.253 (172.253.65.253)  19.901 ms 216.239.40.199 (216.239.40.199)  26.262 ms
12  dns.google (8.8.8.8)  21.310 ms  21.430 ms  21.774 ms

 

[Nod]

You could also test towards Cloudflare @ 1.1.1.1

$ nslookup mybroadband.com 8.8.8.8
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
Name:   mybroadband.com
Address: 138.68.250.210
$ nslookup mybroadband.com 8.8.4.4
Server:         8.8.4.4
Address:        8.8.4.4#53

Non-authoritative answer:
Name:   mybroadband.com
Address: 138.68.250.210
$ nslookup mybroadband.com 1.1.1.1
Server:         1.1.1.1
Address:        1.1.1.1#53

Non-authoritative answer:
Name:   mybroadband.com
Address: 138.68.250.210

 

[cavedog]

Why use google DNS anyways if you are in CPT? You could reduce latency to it to like 5ms if you use Cloudflare or Quad9. It probably won't make that huge of a difference but 5ms is better than 21ms.

google DNS working fine on Afrihost

nslookup mybroadband.co.za 8.8.8.8
Server: dns.google
Address: 8.8.8.8

Non-authoritative answer:
Name: mybroadband.co.za
Addresses: 2606:4700:10::6814:9a9
2606:4700:10::6814:aa9
104.20.10.169
104.20.9.169

 

[cavedog]

Use both Redundancy when one goes tits up

Yeah but the why not cloudflare and quad9?

I'm in PTA so Quad 9 + Google DNS works for me 4ms to both can't complain about browsing speed.