Bug 169088

Summary:	SSH on Konsole, Latency
Product:	[Applications] konsole	Reporter:	David Chua <zhchua>
Component:	general	Assignee:	Konsole Developer <konsole-devel>
Status:	RESOLVED NOT A BUG
Severity:	normal
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description David Chua 2008-08-14 05:34:34 UTC

Version:            (using KDE 3.5.9)
Installed from:    Ubuntu Packages

There seem to be a problem when trying to ssh into a remote server through Konsole. 

Background:

Konsole for me is running on Xterm (XFree 4.X.X) according the Configure Konsole > Sessions. 

davidc@grimlock:~$ konsole --version
Qt: 3.3.8b
KDE: 3.5.9
Konsole: 1.6.6

Problem:

When trying to establish a remote ssh connection, I have a latency of a few seconds before being prompted for a password. It seems like Konsole is taking a while to establish connection.

Reproduce:

What I did was to open up a Konsole terminal and try to do a ssh connection like "ssh -l <username> -p 4400 <remoteip>". I've tried this across 3 different physical servers and experienced the same latency.

It doesn't seem to be a network issue all 3 servers are in the same geological location. 

Expected Behaviour:

Previously when on my Windows systems, I am able to establish ssh connection with a prompt almost immediately.

Comment 1 David Chua 2008-08-14 07:07:24 UTC

davidc@grimlock:~/temp$ ssh -vvv -p 35571 <remote hostname>

OpenSSH_4.7p1 Debian-8ubuntu1.2, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to <remote hostname> [<remote ip>] port 35571.
debug1: Connection established.
debug1: identity file /home/davidc/.ssh/identity type -1
debug1: identity file /home/davidc/.ssh/id_rsa type -1
debug1: identity file /home/davidc/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote 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-2.0-OpenSSH_4.7p1 Debian-8ubuntu1.2
debug2: fd 5 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 119/256
debug2: bits set: 535/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: put_host_port: [<remote serverip>]:35571
debug3: put_host_port: [<remote serverhostname>]:35571
debug3: check_host_in_hostfile: filename /home/davidc/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 3
debug3: check_host_in_hostfile: filename /home/davidc/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 4
debug1: Host '[<hostname>]:35571' is known and matches the RSA host key.
debug1: Found key in /home/davidc/.ssh/known_hosts:3
debug2: bits set: 511/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/davidc/.ssh/identity ((nil))
debug2: key: /home/davidc/.ssh/id_rsa ((nil))
debug2: key: /home/davidc/.ssh/id_dsa ((nil))
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-with-mic,password
debug3: preferred gssapi-keyex,gssapi-with-mic,gssapi,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: gssapi,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found
 
debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found
 
debug1: Unspecified GSS failure.  Minor code may provide more information
 
 
debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/davidc/.ssh/identity
debug3: no such identity: /home/davidc/.ssh/identity
debug1: Trying private key: /home/davidc/.ssh/id_rsa
debug3: no such identity: /home/davidc/.ssh/id_rsa
debug1: Trying private key: /home/davidc/.ssh/id_dsa
debug3: no such identity: /home/davidc/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
davidc@<remoteserver>'s password:

Comment 2 Bram Schoenmakers 2008-08-14 08:15:59 UTC

This is not a Konsole bug, but some issue with SSH. Password prompt can be delayed if the DNS settings are not in order. Please check those.