How disable forwarding-only connections (i.e. non-shell/command non-sftp connections)? (Maybe this is a feature request!)

Darren Tucker dtucker at
Thu Nov 26 17:16:27 AEDT 2015

On Thu, Nov 26, 2015 at 4:49 PM, Tinker <tinkr at> wrote:
> On 2015-11-26 13:33, Darren Tucker wrote:
>>  What is the script going to do?

You didn't answer this.

> How would you do it using bsdauth?
> (PAM seems very redundant to install on OBSD.)

You are using OpenBSD or something else?

>> This sounds a bit like what authpf[1] does.  I imagine you could write
>> firewall rules to block outgoing tcp connections from sshd until after
>> authpf runs, if that is an option for you.
> (That sounds like a very indirect approach, in particular as it would cover
> only some connections?)

Assuming you write the PF rules to do so you should be able to match
local processes (using "user" rules and the $user_id authpf macro) as
well as connections from the IP address they're logging in as (using
"from" rules and $user_ip macro).

But all of this is speculative because you still have not described
what the objective of this exercise is.

Darren Tucker (dtucker at
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

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