I would really appreciate if one of you could look at the information below and explain what’s going on. @WSS already tried to explain this once…I’m ashamed of being dumb…but dumb nevertheless.
The ping resulted in a 70% packet loss…that seems fucked up. But an MTR from the same location:
64 bytes from 107.161.114.34 (107.161.114.34): icmp_seq=1 ttl=58 time=19.5 ms
64 bytes from 107.161.114.34 (107.161.114.34): icmp_seq=2 ttl=58 time=19.6 ms
64 bytes from 107.161.114.34 (107.161.114.34): icmp_seq=6 ttl=58 time=19.6 ms
10 packets transmitted, 3 received, 70% packet loss, time 1803ms
rtt min/avg/max/mdev = 19.599/19.636/19.695/0.042 ms
So you can ignore points 1 and 3. The only packet loss that matters is the one that carries forward. If 0% follows it, the previous one doesn’t matter. The only one that is relevant here is the 90% packet loss on point 7, I assume your end point. This either means packet loss in the datacenter or on the server itself.
Edit: Passing this on to the team as well, to review from our side.
Suppose if I were entertaining the idea of it being server side, I might ask if there are any firewall configurations that might rate limit ICMP requests. Who knows what CSF does these days, it’s always been the #1 culprit behind everything on systems that run it in my experience lol. Any chance something like that has been set up?
Hmm. What we’re looking at on this side is the gateway, and seeing no packet loss to it. That doesn’t rule out something outside of the OS, it just helps to rule out a wider network issue. Could still be worth a ticket. Among the wildest theories in my head, a bad cable is an example of one that you couldn’t solve.
Do UDP and TCP mtrs for comparison. ICMP might be deprioritized as mentioned.
mtr --tcp --port 80 your.host
mtr --udp your.host
I heard of a “server security” software that caused basically 90% ICMP packetloss for normal ping interval because of really stupid settings regarding ICMP, you might be experiencing that.
//EDIT: It was apparently CSF. Are you using it by any chance?