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WireGuard guide: fix MTU issue

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Some sites work in sys-wireguard, but did not work in an AppVM
connected to sys-wireguard. Examples:

https://duckduckgo.com
https://atlassian.net

The problem is caused by MTU. The solution was proposed on
https://github.com/QubesOS/qubes-issues/issues/5264#issuecomment-707683771
This commit is contained in:
Rat Poison 2020-11-24 13:19:29 +01:00
parent 0c289d186a
commit f74b31ad0b
1 changed files with 1 additions and 1 deletions
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docs/wireguard/README.md
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@ -90,7 +90,7 @@ Create the file `/home/user/wg0.conf` with the following content:
PrivateKey = <private key of the client>
Address = 192.168.66.2/32
DNS = 1.1.1.1
PostUp = iptables -t nat -I PREROUTING 1 -p udp -m udp --dport 53 -j DNAT --to-destination 1.1.1.1
PostUp = iptables -t nat -I PREROUTING 1 -p udp -m udp --dport 53 -j DNAT --to-destination 1.1.1.1; iptables -t nat -I POSTROUTING 3 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
[Peer]
PublicKey = <public key of the client>