Hi Sahil, The packets produced by wireguard are simple ip packets containing a udp header which together specify the ip address and udp port number the packet should be handed to. Wireguard is listening on that port and receives the full ip packet. The contents of the udp part inside it are a special security header (specially designed for wireguard) plus encrypted data of original ip packet. So no ESP, AH, or anything devised in the past. It uses a special header, custom made for wireguard. Head over to wireguard.com if you want to know more about the protocol. Saeid, -------- Original message --------From: wireguard-request@lists.zx2c4.com Date: 01/08/2017 14:30 (GMT+03:30) To: wireguard@lists.zx2c4.com Subject: WireGuard Digest, Vol 17, Issue 2 Send WireGuard mailing list submissions to wireguard@lists.zx2c4.com To subscribe or unsubscribe via the World Wide Web, visit https://lists.zx2c4.com/mailman/listinfo/wireguard or, via email, send a message with subject or body 'help' to wireguard-request@lists.zx2c4.com You can reach the person managing the list at wireguard-owner@lists.zx2c4.com When replying, please edit your Subject line so it is more specific than "Re: Contents of WireGuard digest..." Today's Topics:    1. Re: Tunneling protocol in WireGuard (Sahil Gupta)    2. Any tool to study the wireguard effect on Bandwidth, memory       and processing power. (Sahil Gupta) ---------------------------------------------------------------------- Message: 1 Date: Tue, 1 Aug 2017 02:29:18 -0400 From: Sahil Gupta To: "Jason A. Donenfeld" Cc: WireGuard mailing list Subject: Re: Tunneling protocol in WireGuard Message-ID: Content-Type: text/plain; charset="utf-8" If we go in the history? of tunneling protocols. PPP protocol get tunnel by PPTP using GRE tunneling protocol. L2F by CISCO uses L2F header. L2TP by Microsoft uses L2TP header. IPSec uses either ESP,AH or combination of both depending on kind of security required then attach the other IP header. So I was wondering if there is some header between IPv4 and IPv6 which define some control information about tunneled packet. Or just IPv6 just after IPv4 header and vice versa. -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 2 Date: Tue, 1 Aug 2017 02:42:59 -0400 From: Sahil Gupta To: WireGuard mailing list Subject: Any tool to study the wireguard effect on Bandwidth, memory and processing power. Message-ID: Content-Type: text/plain; charset="utf-8" Is there any tool which helps to study the effect on using WireGuard VPN on different OS(including embedded)? Regards Sahil Gupta -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Subject: Digest Footer _______________________________________________ WireGuard mailing list WireGuard@lists.zx2c4.com https://lists.zx2c4.com/mailman/listinfo/wireguard ------------------------------ End of WireGuard Digest, Vol 17, Issue 2 ****************************************