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Multiple clients not works #323

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LevelOne2k opened this issue Feb 20, 2018 · 2 comments
Closed

Multiple clients not works #323

LevelOne2k opened this issue Feb 20, 2018 · 2 comments

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@LevelOne2k
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Hello, I have successfully installed IPsec VPN Server Auto Setup Script. I've created 2 additional users for IPsec, it works the connection works. Invalid passwords and usernames.

Both clients get the same IP address: 192.168.43.10

A client can then no longer connect to the Internet. Does not connect multiple clients at the same time?
@hwdsl2
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hwdsl2 commented Feb 24, 2018

@LevelOne2k Hello! This is currently a known issue, where multiple VPN clients behind the same NAT (e.g. home router) cannot connect simultaneously to the VPN server. For details, refer to [1] [2] [3]. This limitation applies both when using the same VPN user or different VPN users. For IPsec/XAuth a fix has been planned in the next Libreswan version [3].

[1] https://github.com/hwdsl2/setup-ipsec-vpn#important-notes
[2] #314
[3] libreswan/libreswan#166

@hwdsl2 hwdsl2 closed this as completed Feb 24, 2018
@SystemDisc SystemDisc mentioned this issue May 19, 2018
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letoams added a commit to libreswan/libreswan that referenced this issue Sep 8, 2018
@letoams
pluto: Fix refine_host_connection() for two roadwarriors using ID_IPv…
f235f8b 
…4 behind same NAT

This is referenced in a number of bugs:

#166
hwdsl2/setup-ipsec-vpn#314
hwdsl2/setup-ipsec-vpn#323
hwdsl2/setup-ipsec-vpn#357
hwdsl2/docker-ipsec-vpn-server#62

Note that this patch only is half of the fix. The other fix is commit
9ccfe20 which prevents being stuck on the 0th lease when
can_share_lease() is FALSE (as it is for authby=secret)
@letoams
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letoams commented Sep 18, 2018

note libreswan 3.26 was released that addresses the issue related to bad lease ip re-use

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@letoams @hwdsl2 @LevelOne2k