From: Tomas Herceg <tth@rfa.cz>
To: wireguard@lists.zx2c4.com
Subject: Re: multi-home difficulty
Date: Tue, 21 Nov 2017 14:32:24 +0100 [thread overview]
Message-ID: <f39bc571-6322-17fb-4fb6-f744417d384f@rfa.cz> (raw)
In-Reply-To: <CAC6SzH+Q-1SRVXOoScGhXWraOLdp9_Rud6cMbQ95a51r=eRWTw@mail.gmail.com>
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+1 for binding only on specific IP
On 11/21/2017 02:21 PM, d tbsky wrote:
> Hi:
> I tested wireguard and the speed is amazing. but when I try to
> deploy it to our real linux firewall, I found it is hard to make it
> work.
>
> our current linux firewall have multiple interface and multiple
> routing tables. local program will get lan ip address and nat to
> correct wan ip address when goto internet.
>
> since wireguard can not bind to specific ip address, it sometimes
> use wrong ip address to reply and the vpn communication can not be
> established.
>
> for example:
>
> config for client site: (assume wan ip is 2.2.2.2)
> interface: wg0
> public key: ****
> private key: (hidden)
> listening port: 51820
> peer: ****
> endpoint: 1.1.1.1:51820
> allowed ips: 0.0.0.0/0
>
> config for server site: (assume wan ip is 1.1.1.1)
> interface: wg0
> public key: ****
> private key: (hidden)
> listening port: 51820
> peer: ****
> allowed ips: 0.0.0.0/0
>
> when client initial connect to server, at server site I saw flow like below:
> "cat /proc/net/nf_conntrack | grep 51820"
>
> ipv4 2 udp 17 23 src=172.18.1.254 dst=2.2.2.2 sport=51820
> dport=51820 packets=1 bytes=120 [UNREPLIED] src=2.2.2.2 dst=1.1.1.1
> sport=51820 dport=1085 packets=0 bytes=0 mark=1 zone=0 use=2
> ipv4 2 udp 17 23 src=2.2.2.2 dst=1.1.1.1 sport=51820
> dport=51820 packets=1 bytes=176 [UNREPLIED] src=1.1.1.1 dst=2.2.2.2
> sport=51820 dport=51820 packets=0 bytes=0 mark=1 zone=0 use=2
>
> so at first client 2.2.2.2:51820 connect to server 1.1.1.1:51820
> but then server use 172.18.1.254(lan ip address) to reply and 51820
> port is nat to 1085 so the communication is broken.
>
> if wireguard can bind to specific ip address then there will be no problem.
> or if wireguard can reply with the correct ip address.( eg: if client
> connect to wireguard ip 1.1.1.1, then wiregurad should reply via ip
> address 1.1.1.1) then maybe there will be no problem.
>
> Regards,
> tbskyd
> _______________________________________________
> WireGuard mailing list
> WireGuard@lists.zx2c4.com
> https://lists.zx2c4.com/mailman/listinfo/wireguard
>
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next prev parent reply other threads:[~2017-11-21 13:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-21 13:21 d tbsky
2017-11-21 13:32 ` Tomas Herceg [this message]
2017-11-21 14:15 ` Jason A. Donenfeld
2017-11-21 14:35 ` d tbsky
2017-11-22 23:35 ` Jason A. Donenfeld
2017-11-23 17:06 ` d tbsky
2017-11-29 11:05 ` d tbsky
2017-11-29 13:13 ` Jason A. Donenfeld
2017-11-29 13:51 ` Jason A. Donenfeld
2017-11-29 14:08 ` d tbsky
2017-11-29 14:10 ` Jason A. Donenfeld
2017-11-29 14:16 ` d tbsky
2017-11-29 14:49 ` Jason A. Donenfeld
2017-11-30 6:15 ` d tbsky
2017-11-30 6:22 ` d tbsky
2017-11-30 6:30 ` d tbsky
2017-12-01 7:44 ` d tbsky
2017-12-03 17:45 ` d tbsky
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