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Traffic to containers via NAT stops working when using IPSec to encrypt network connections #244

amhuber opened this issue Jun 7, 2018 · 6 comments


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@amhuber amhuber commented Jun 7, 2018

Using Windows Server 1709 or 1803 we are attempting to use IPSec encryption along with Windows Containers using NAT. For example:

Client --(unencrypted TCP)--> Container Host --> NAT --> Container


Not working:
Client --(encrypted with IPSec)--> Container Host --> NAT --> Container


IPSec is being enabled via standard WFP configuration with:

New-NetIPsecRule -LocalAddress [local] -RemoteAddress [remote]-InboundSecurity Require -OutboundSecurity Require 

We can reproduce this issue with Cloud Foundry which uses hcsshim as part of the component and we also see the same behavior using Docker, such as:

docker run -d -p 8080:80 --name aspnet microsoft/aspnet

It appears that this is a fundamental limitation with WinNAT / HNS / WFP but we aren't sure if some combination of settings can make this work.

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@natalieparellano natalieparellano commented Jun 12, 2018

@dineshgovindasamy this is the other issue we discussed. Is the info here sufficient, or is there another specific trace that you would like us to run?

cc @mhoran @ajgokhale

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@amhuber amhuber commented Jun 12, 2018

Just FYI, we've also tested this on a recent Server 2019 preview release (build 17677) and see exactly the same thing.

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@amhuber amhuber commented Aug 2, 2018

FYI, we requested Microsoft update their documentation to make it clear that IPSec to the container is not supported at this time:

It is being considered for inclusion in a future version of Windows per Microsoft support.

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@genevieve genevieve commented Feb 28, 2019

@dineshgovindasamy Is there any update on whether IPSec is supported now?

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@davidk355 davidk355 commented Jun 17, 2019

Do we have an update on when IPSec will be supported?

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@jmprice jmprice commented Jul 23, 2019

Any progress on this? What do we need to do to get some traction or at least if it is being worked on? Is there a better place to report or track this issue?

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