Portmaster+Proxifier compatibility

[squromiv]

Portmaster last version
Proxifier
Windows Server 2016 x64

Fails to intercept connections before Proxifier.

[github-actions]

Hey @squromiv, thank you for reporting on a compatibility.

We keep a list of compatible software and user provided guides for improving compatibility in the wiki - please have a look there.
If you can't find your software in the list, then a good starting point is our guide on How do I make software compatible with Portmaster.

If you have managed to establish compatibility with an application, please share your findings here. This will greatly help other users encountering the same issues.

[github-actions]

Greetings and welcome to our community! As this is the first issue you opened here, we wanted to share some useful infos with you:

• 🗣️ Our community on Discord is super helpful and active. We also have an AI-enabled support bot that knows Portmaster well and can give you immediate help.
• 📖 The Wiki answers all common questions and has many important details. If you can't find an answer there, let us know, so we can add anything that's missing.

[Raphty]

This message lacks in detail, can you specify what has failed? thanks!

[squromiv]

In detail: Portmaster fails to intercept connections before Proxifier. So it does not work correctly and does not filter traffic with applied rules.

The developer of Proxifier noticed, that

We have not tested Proxifier with Portmaster app but from the description I see that it uses WFP technology on Widows.
Proxifier uses the same API, so conflicts are possible.

Need to use both apps by this way:

1. filter apps and processes by Portmaster
2. route "allowed" apps to different proxies or ethernet interfaces by Proxifier

That`s all. So is there any way to force these apps to work simultaneously?

[dhaavi]

If I understand correctly, Proxifier will have to change their Filter Weight Assignment if they want to be run after other software: https://learn.microsoft.com/en-us/windows/win32/fwp/filter-weight-assignment

Nothing we can do here to influence that.

Here is where Portmaster's weight is set: https://github.com/safing/portmaster-windows-kext/blob/28593163f29c2976efa16f3458d809bf3577aafc/pm_kext/src/pm_register.c#L154

I don't know of other ways how to influence WFP callout order.

[squromiv]

Author of Proxifier reported:

I have checked your link, the source code of Postmaster and Proxifier.
Postmaster sublayer weight is 0xFFFF. Proxifier is 0x800A. So Postmaster should be called before Proxifier.

[squromiv]

But in fact, it is not working as it should. Or I do not understand smth.

As for example, in log of Proxifier I see

And in settings of Portmaster this app marked as totally blocked.

[Raphty]

not sure what your screenshot shows, but Portmaster always resolves the dns requests, so you get the info where the connection would be going... otherwise you would not see the destination ip or country....

resolving a domain is a different connection. it also does not connect to the provider, it only goes to the DNS server.

[squromiv]

but Portmaster always resolves the dns requests

It is not DNS query. ClipClip.exe attempts to connect to address q.blueswan.io in Proxifier besides of it is "blocked" in Portmaster.

[Raphty]

it does try yes, and to do so it needs to resolve the DNS first. Which Portmaster does, and then Portmaster blocks the actual connection.

I am not familiar with proxifier so I cant say how you think you know that there is direct connection established. But pleas shed some more light on this.

[github-actions]

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[github-actions]

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