Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Specify site to site MTU & MSS at one or both ends

    WireGuard
    1
    1
    59
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • M
      McMurphy
      last edited by

      When configuring a site to site VPN using WireGuard do I need to specify the MSS & MTU values at both ends or just the client end? I have read that the server will set itself in accordance with the values specified by the WG client.

      I see the WG client shows the MTU value of 1420 correctly
      3cf9757c-a98e-408c-b2ec-0fe6c0b2ea05-image.png

      However the WG server still shows an MTU value of 1500
      f3a3bfa5-ce36-498c-9bb2-5701f1e718dc-image.png

      I am not sure if the I/O errors are a problem I should be looking into or not. I originally had connectivity issues using the defaults and set MSS to 1380 and MTU to 1420 and everything works well now.

      1 Reply Last reply Reply Quote 0
      • First post
        Last post
      Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.