Hi, On Wed, Aug 06, 2025 at 07:46:53AM -0400, Jon Chiappetta via Openvpn-devel wrote: > With my modifications made, I can specifically and directly target an exact > 1500 byte MTU VPN link so that it correctly matches the LAN and WAN side of > the networks which is really important network wise and I can also let TCP > at the kernel level beautifully handle huge streams of bulk data and > ordering and delivery on my behalf as efficiently as possible. This would > be a pretty nice modification if I could make it through to the end.
This is *exactly* what OpenVPN will do out of the box, as of today - do an interface MTU of 1500 (unless told otherwise), and if you do TCP, the TCP layer will handle the necessary segmentation. If you do UDP, you get outside fragmentation. Here's a few tcpdumps in different config scenarios, demonstrating the 1500 bytes "inside" just fine https://community.openvpn.net/MTU%20and%20Fragments gert -- "If was one thing all people took for granted, was conviction that if you feed honest figures into a computer, honest figures come out. Never doubted it myself till I met a computer with a sense of humor." Robert A. Heinlein, The Moon is a Harsh Mistress Gert Doering - Munich, Germany g...@greenie.muc.de
signature.asc
Description: PGP signature
_______________________________________________ Openvpn-devel mailing list Openvpn-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-devel
