I don't think the issue can be determined from that.
.....but if both points can reach one another then it's pretty much
always NAT/ALG issue, or an MTU issue.
Is there anything that would prevent this end user from sending and
receiving 1500 byte packets? PPPoE? Tunneling of any sort? There's
nothing inherently wrong with that, but some devices (Sonicwall) don't
participate in MTU discovery, or seem to ignore the path MTU. That
isn't "your fault" but you can probably fix it.
NAT stuff is harder to pin down, but for example we had someone who's
VPN wouldn't work consistently through NAT on a UFiber Nano ONT, but
when we bridged the ONT and moved NAT to a Mikrotik behind it magically
everything worked.
On 3/17/2021 10:50 AM, Mark - Myakka Technologies wrote:
I have a customer that has some type of VPN router device on our
system. Her VPN isn't working anymore. Her Internet is fine. I did
a packet capture for her IT guys and sent it to them. Their answer
is the usual "It's your ISPs fault". I'm not a VPN expert, but I
attached the filtered packet dump. Looks like things are talking back
and forth. Any issues anyone can see?
--
Thanks,
Mark mailto:[email protected]
Myakka Technologies, Inc.
www.Myakka.com
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