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Category: VyOS Platform Blog | vpn

Christian Pössinger
Posted 1 Aug, 2021

PKI and IPSec IKEv2 remote-access VPN

Hello! VyOS was always strong in supporting a multitude of different VPN techniques ranging from old school IPsec site-to-site/DMVPN setups to new kids on the b...
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Daniil Baturin
Posted 30 Mar, 2018

Take a third option: site to site OpenVPN

I've written a long series of post about setting up IPsec VPNs between NATed machines. As you've already seen, with some creative configuration it's possible, b...
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Daniil Baturin
Posted 1 Feb, 2018

Interaction between IPsec and NAT (on the same router)

I've just completed a certain unusual setup that involved NATing packets before they are sent to an IPsec tunnel, so I thought I'll write about this topic. Even...
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Daniil Baturin
Posted 19 Jan, 2018

Setting up GRE/IPsec behind NAT

In the previous posts of this series we've discussed setting up "plain" IPsec tunnels from behind NAT. The transparency of the plain IPsec, however, is more oft...
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Daniil Baturin
Posted 12 Jan, 2018

How to setup an IPsec connection between two NATed peers: using id's and RSA keys

In the previous post from this series, we've discussed setting up an IPsec tunnel from a NATed router to a non-NATed one. The key point is that in the presence ...
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Daniil Baturin
Posted 5 Jan, 2018

Why IPsec behind 1:1 NAT is so problematic and what you can do about it

Not so long ago the only scenario when the issues with IPsec and NAT could arise was a remote access setup, while routers invariably had real public addresses a...
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