On 7/6/24 18:13, Patrick M. Hausen wrote:
Hello.
It's almost surely due to a problem with the UDP packets that implement the
VPN: again, according to tcpdump they go out host B, but never reach host A.
Is it remotely possible that one of the ISPs blocks these UDP packets as part
of an automatic "DoS protection" mechanism?
Of course I cannot exclude it with 100% confidence.
That said:
_ host A has about 10 VPNs, only one is misbehaving, so I guess it's not
ISP A;
_ host B has an enterprise-grade contract, so they should not firewall
anything; another one of the above VPNs connects to a different host
which has the same type of contract with the same ISP and it works.
Maybe it's the ISP or someone in between... I have no control over this.
I'd like to exclude any local issue, about which I might actually do
something.
bye & Thanks
av.
