Hi all,
I'm having trouble getting SSHD to work in a UML guest. I've compiled
from kernel 2.6.12-686-smp under Ubuntu using the skas-v9-pre7 patch for
the host and bs11 for the guest. I've got networking setup using a
bridge on the host and tuntap. I can get a netcat connection from my
workstation into the uml-guest, and I can ssh from the uml-guest to
other servers. But when I try to ssh /into/ the uml-guest I get this
(with verbosity):
OpenSSH_3.8.1p1, OpenSSL 0.9.7g 11 Apr 2005
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to 10.1.200.150 [10.1.200.150] port 22.
debug1: Connection established.
debug1: identity file /Users/ian/.ssh/identity type -1
debug1: identity file /Users/ian/.ssh/id_rsa type -1
debug1: identity file /Users/ian/.ssh/id_dsa type -1
ssh_exchange_identification: Connection closed by remote host
Which looks exactly like normative output, except where ssh into the
uml-guest fails with "Connection closed", a successful session says
debug1: Remote protocol version 2.0, remote software version
OpenSSH_4.1p1 Debian-7ubuntu4
So I killed SSHD on the uml-guest, and restarted it with -ddd, which is
when I see this when trying to connect:
Server listening on 10.1.200.150 port 22.
debug3: fd 4 is not O_NONBLOCK
reexec socketpair: Address family not supported by protocol
It gives that same error even if I start sshd with a -4 to force IPv4.
An strace of sshd show this error on connection attempt:
socketpair(PF_FILE, SOCK_STREAM, 0, 0xbfb65ccc) = -1 EAFNOSUPPORT
(Address family not supported by protocol)
I tried recompiling the uml-guest giving special attention to
configuration options under Networking->Networking Options, but the only
suspect thing in there that I saw was enabling Bridging support, which
didn't change behavior at all.
I also checked to make sure /dev/random and /dev/urandom are working,
which they are, and specified in sshd_config the IP address for it to
listen to, rather than all. Finally, I tried regenerating the RSA keys.
None of this changed behavior.
Sorry for the lengthy report, tried to keep it terse. Any advice would
be greatly appreciated.
Thanks much,
Ian
P.S. I tried renaming /lib/tls to /lib/tls.disabled and restarting the
uml-guest, but that also didn't change behavior.
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