[Bug 3088] New: sys_tun_open: failed to open tunnel control interface: No such device

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3088

            Bug ID: 3088
           Summary: sys_tun_open: failed to open tunnel control interface:
                    No such device
           Product: Portable OpenSSH
           Version: 8.0p1
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: sshd
          Assignee: unassigned-bugs at mindrot.org
          Reporter: tjbryant at gmail.com

I've tried this on four different servers running versions from 7 to
8.0p1-3. All the servers were running linux. I tried it on x86_64, x86,
and MIPS and get the same error each time. This is the command line
that I am using:

$ sudo ssh -v -w 1:1 -o Tunnel=ethernet root at 192.168.1.1
...
debug1: Requesting tun unit 1 in mode 1
debug1: sys_tun_open: failed to open tunnel control interface: No such
device
Tunnel device open failed.
Could not request tunnel forwarding.
...

It logs me in and brings me to the prompt, but tap1 doesn't exist on
the remote or local server.

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