Weird problem with DPinger Fixed

[xaxero]

I am using a 4G modem and everything was working fine except DPinger. Gateway is always shown as down. Doing a TCP Dump I see ping returned when I do a normal ping all works fine.

I tried to use ChatGPT to debug and it suggested among other ideas to do a packet capture. Pings with 64 bytes were working but Dpinger's 8 were not.

Upping the packet count to 64 fixed it. - Must be an issue on the ISP end.

08:02:17.325629 IP 192.168.0.173 > 151.101.195.5: ICMP echo request, id 59929, seq 39, length 8
08:02:18.326719 IP 192.168.0.173 > 151.101.195.5: ICMP echo request, id 59929, seq 40, length 8
08:04:14.840672 IP 192.168.0.173 > 151.101.195.5: ICMP echo request, id 45724, seq 1, length 64
08:04:14.884388 IP 151.101.195.5 > 192.168.0.173: ICMP echo reply, id 45724, seq 1, length 64
08:04:15.842099 IP 192.168.0.173 > 151.101.195.5: ICMP echo request, id 45724, seq 2, length 64
08:04:15.879343 IP 151.101.195.5 > 192.168.0.173: ICMP echo reply, id 45724, seq 2, length 64

[franco]

What ISP would that be? What's the minimum length you can get away with?


Cheers,
Franco

[xaxero]

Movistar Uruguay - got it down to 32 bytes

[franco]

Thanks, I'm sure that information is useful to others in the future.


Cheers,
Franco