No response to my DNS queries and icmp

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luksz sz

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Feb 12, 2025, 11:02:39 AM Feb 12

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Hi,

after experiencing ddos dns amplification attack, 8.8.8.8 and 8.8.4.4 seem to deny our dns queries (udp).

$ dig -t TXT test.dns.google.com . '@ dns.google .'

; <<>> DiG 9.10.3-P4-Ubuntu <<>> -t TXT test.dns.google.com . @ dns.google .
;; global options: +cmd
;; connection timed out; no servers could be reached

#mtr 8.8.8.8 --report -c 5 -n
Start: Mon Feb 3 18:38:27 2025
HOST: Loss% Snt Last Avg Best Wrst StDev
1.|-- 212.14.52.81 0.0% 5 0.3 0.3 0.2 0.3 0.0
2.|-- 213.155.191.254 0.0% 5 0.4 0.3 0.2 0.5 0.0
3.|-- 89.46.144.185 0.0% 5 8.4 9.6 8.4 14.4 2.5
4.|-- 142.251.253.223 0.0% 5 9.3 9.4 9.3 9.8 0.0
5.|-- 108.170.234.103 0.0% 5 9.4 9.3 9.1 9.5 0.0
6.|-- ??? 100.0 5 0.0 0.0 0.0 0.0 0.0

# /usr/sbin/traceroute -n -w 2 -m 30 dns.google
traceroute to dns.google (8.8.8.8), 30 hops max, 60 byte packets
1 212.14.52.81 0.255 ms 0.265 ms 0.259 ms
2 213.155.191.254 0.325 ms 0.326 ms 0.329 ms
3 89.46.144.185 8.371 ms 8.368 ms 8.351 ms
4 142.251.253.223 9.309 ms 192.178.99.191 8.435 ms 142.251.253.223 9.367 ms
5 142.250.239.81 8.655 ms 72.14.237.17 8.534 ms 142.250.239.81 8.636 ms
6 8.8.8.8 8.455 ms 8.515 ms 8.474 ms