I installed cygwin ( CYGWIN_NT-5.2 ) on windows 2003 and windows XP. On remote I can run the commands very fast on the XP machine. Buf from remote machine the command execution take very long to complete. Simple date command take 25 seconds to return the output. Even from the local 2003 server running command via ssh takes 20+ sec to give output. Following is the debug output of sshd in the windows 2003 server. 2003 $ /usr/sbin/sshd -d debug1: sshd version OpenSSH_4.3p2 debug1: private host key: #0 type 0 RSA1 debug1: read PEM private key done: type RSA debug1: private host key: #1 type 1 RSA debug1: read PEM private key done: type DSA debug1: private host key: #2 type 2 DSA debug1: rexec_argv[0]='/usr/sbin/sshd' debug1: rexec_argv[1]='-d' debug1: Bind to port 22 on 0.0.0.0. Server listening on 0.0.0.0 port 22. Generating 768 bit RSA key. RSA key generation complete. debug1: fd 4 clearing O_NONBLOCK debug1: Server will not fork when running in debugging mode. debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7 debug1: inetd sockets after dupping: 3, 3 Connection from 130.35.185.57 port 4902 debug1: Client protocol version 2.0; client software version OpenSSH_4.3 debug1: match: OpenSSH_4.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-1.99-OpenSSH_4.3 debug1: list_hostkey_types: ssh-rsa,ssh-dss debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: client->server aes128-cbc hmac-md5 none debug1: kex: server->client aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug1: userauth-request for user ntregres service ssh-connection method none debug1: attempt 0 failures 0 Failed none for ntregres from 130.35.185.57 port 4902 ssh2 debug1: userauth-request for user ntregres service ssh-connection method publick ey debug1: attempt 1 failures 1 debug1: test whether pkalg/pkblob are acceptable debug1: temporarily_use_uid: 11114/10513 (e=11114/10513) =================HANGS about 10 secs ===================== debug1: trying public key file /home/ntregres/.ssh/authorized_keys debug1: matching key found: file /home/ntregres/.ssh/authorized_keys, line 1 Found matching RSA key: 35:32:64:ef:b0:fe:52:6a:82:3d:1b:a6:a5:8e:96:39 debug1: restore_uid: 11114/10513 Postponed publickey for ntregres from 130.35.185.57 port 4902 ssh2 debug1: userauth-request for user ntregres service ssh-connection method publick ey debug1: attempt 2 failures 1 debug1: temporarily_use_uid: 11114/10513 (e=11114/10513) debug1: trying public key file /home/ntregres/.ssh/authorized_keys debug1: matching key found: file /home/ntregres/.ssh/authorized_keys, line 1 Found matching RSA key: 35:32:64:ef:b0:fe:52:6a:82:3d:1b:a6:a5:8e:96:39 debug1: restore_uid: 11114/10513 debug1: ssh_rsa_verify: signature correct Accepted publickey for ntregres from 130.35.185.57 port 4902 ssh2 debug1: monitor_child_preauth: ntregres has been authenticated by privileged pro cess debug1: Entering interactive session for SSH2. debug1: server_init_dispatch_20 debug1: server_input_channel_open: ctype session rchan 0 win 131072 max 32768 debug1: input_session_request debug1: channel 0: new [server-session] debug1: session_new: init debug1: session_new: session 0 debug1: session_open: channel 0 debug1: session_open: session 0: link with channel 0 debug1: server_input_channel_open: confirm session debug1: server_input_channel_req: channel 0 request exec reply 0 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req exec =================HANGS about 10 secs ===================== debug1: Received SIGCHLD. debug1: session_by_pid: pid 2652 debug1: session_exit_message: session 0 channel 0 pid 2652 debug1: session_exit_message: release channel 0 debug1: session_by_channel: session 0 channel 0 debug1: session_close_by_channel: channel 0 child 0 debug1: session_close: session 0 pid 0 debug1: channel 0: free: server-session, nchannels 1 Connection closed by 130.35.185.57 debug1: do_cleanup Closing connection to 130.35.185.57
Delays like that are often caused by DNS reverse-resolution problems. Does adding "UseDNS no" to sshd_config (and restarting sshd) and/or putting the client's IP address in the hosts file make any difference?
*** Bug 1185 has been marked as a duplicate of this bug. ***
With some more analysis this happens only for a domain user. For the windows 2003 localuser the SSH commands runs faster. But I can login without any delay in terminals. Is there any way to solve this. I added "UseDNS no" to sshd_config and IP in /etc/hosts file, but it issue exist for the domain user.
Can you reproduce this with a more recent OpenSSH version (5.0p1) and corresponding cygwin DLL?
I don't have environment to test this.
Can't reproduce - probably a Cygwin issue.
Mass move of RESOLVED bugs to CLOSED now that 5.3 is out.