Jim Mercer <[EMAIL PROTECTED]> wrote:
>
>i was using pty-redir (from netbsd) and ssh to do VPN (ppp over ssh).
>under 3.x release, with the ports/ssh, this worked fine.
>however, starting with when openssh became part of the system, it stopped
>working.
>when i did a "pty-redir ssh remhost /usr/sbin/pppd"
>the openssh would complain:
>"Pseudo-terminal will not be allocated because stdin is not a terminal."
>
>i managed to get it working with the stock openssh using the following patch.
>(yes, it is a quick and ugly hack)
Hmm, I was confused for a while there by your reversed patch, but I know
where we are now :-)
I had a similar problem with user-ppp over ssh talking to an sshd on
OpenBSD. The problem turned out to be that if sshd gives you a pty then
stdin and stdout are the same bidirectional descriptor (so ppp works)
but if that isn't the case then sshd uses two pipes in a unidirectional
fashion. FreeBSD's sshd (since March in -CURRENT and April in 4.x) has
a tweaked includes.h that doesn't #define USE_PIPES, so stdin is always
bidirectional and ppp over ssh works. If your sshd is compiled in this
way then you shouldn't need pty-redir either (although I can't find
the source to check that it does what I think it does).
Thanks to Brian "ppp over ssh over httptunnel" Somers for the explanation!
Tony.
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