8 Jun
2019
8 Jun
'19
9:08 p.m.
On 6/8/19 4:50 PM, James Knott via talk wrote:
Bottom line, fragments are unlikely to be an issue as all modern OSs use PMTUD on TCP and Linux uses it on everything.
True enough, but it is also easy to check and determine whether it is an issue. I get a ticket or two a month with remote employees who are connecting from strange places, or have issues with VPNs, and quite a few are MTU related. I'm curious about PMTUD now: my understanding is that ICMP needs to be unrestricted between server & client. If something is blocking that traffic how does it work? Also how does PTMUD handle asymmetric paths? Cheers, Jamon