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From: Kunal Shah <kunalv.shah@gmail.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: WireGuard mailing list <WireGuard@lists.zx2c4.com>
Subject: Re: wireguard looses internet connection intermittently.
Date: Sun, 9 Feb 2020 10:55:27 +0530	[thread overview]
Message-ID: <CAMK_KHjEwTP9v=8rB+gNRSsrUNmsUj5QNywv3L85523Vw4DG4A@mail.gmail.com> (raw)
In-Reply-To: <CAHmME9ocPawJ4amTG4JjcJga1EYKZUnEMoDvNSoJYvFqJbT3=g@mail.gmail.com>


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Hi Jason,

Thanks for your response. After the changes you suggested, It still gives
me the same problem. Now my GCP server wireguard configuration looks like
this.

[Interface]
Address = 192.168.1.1
SaveConfig = true
PostUp = iptables -A FORWARD -i %i -j ACCEPT; iptables -A FORWARD -o %i -j
ACCEPT; iptables -t nat -A POSTROUTING -o ens4 -j MASQUERADEi;iptables -t
mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -j TCPMSS
--clamp-mss-to-pmtu
PostDown = iptables -D FORWARD -i %i -j ACCEPT; iptables -D FORWARD -o %i
-j ACCEPT; iptables -t nat -D POSTROUTING -o ens4 -j MASQUERADE
ListenPort = 51840
PrivateKey = <private key>
MTU=1380

[Peer]
PublicKey = <public key>
AllowedIPs = 192.168.1.2/32

On Sun, 9 Feb 2020 at 03:06, Jason A. Donenfeld <Jason@zx2c4.com> wrote:

> GCP uses an MTU of 1460 because Google's network does weird things.
> That means the MTU for WireGuard should be 1380. On the GCP box, try
> adding `MTU=1380` to your config and add this line to PostUp: `
> ; iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -j
> TCPMSS --clamp-mss-to-pmtu`
>

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  reply	other threads:[~2020-02-14 10:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-07 14:52 wireguard looses internet connection intermittently Kunal Shah
2020-02-08 21:36 ` Jason A. Donenfeld
2020-02-09  5:25   ` Kunal Shah [this message]
2020-02-09  6:47     ` Kunal Shah

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