Every time I try to ssh with a passwordless key from Windows (PuTTY or Command Prompt), the key is authenticated but I get the error "Server refused to allocate pty". From the Windows Command Prompt console (using cygwin or OpenSSH - I forget which!) ssh also fails but with a slightly different error message: "PTY allocation request failed on channel 0"
I can ssh and login with password, just not using passwordless authentication. I rebooted b3 but the problem remains.
ssh -vvv reveals:
Code: Select all
[snip] debug1: Authentication succeeded (publickey). Authenticated to b3 ([192.168.1.n]:22). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Requesting email@example.com debug1: Entering interactive session. debug1: Remote: Port forwarding disabled. debug1: Remote: Pty allocation disabled. debug2: callback start debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x10 debug2: client_session2_setup: id 0 debug2: channel 0: request pty-req confirm 1 debug2: channel 0: request shell confirm 1 debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: channel_input_status_confirm: type 100 id 0 PTY allocation request failed on channel 0 debug2: channel 0: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 0 debug2: shell request accepted on channel 0 Linux b3 126.96.36.199-11 #1 Tue Apr 3 21:45:12 FET 2012 armv5tel [snip]
Another strangeness - I set up passwordless ssh so that I could automate rsync from Windows 7 Task Manager to b3. This appears still to be working - so b3 is presumably accepting passwordless keys in some situations, but no longer from the previously working PuTTY configuration.