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SSH and telnet long delay to recieve prompt.

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Operating Systems Solaris SSH and telnet long delay to recieve prompt.
# 1  
Old 02-18-2016
SSH and telnet long delay to recieve prompt.
Hi guys.
You'd have to excuse me a bit, as I'm a noob. I really try to avoid asking questions and do research for whatever linux issues that may arise.
I am experiencing a long wait for the shell to come up when I ssh or telnet into a Sunos 5.10 environment.
It takes 70 seconds to give me the shell after I telnet or ssh into the server from either putty in a windows environment or from any other linux distribution.
Can someone help guide me? I am being told it may be a program which is causing this undesired effect (from another internal staff member)but not sure how to investigate.
My investigations point to dns issues, but when I try to edit my files to suit what I've found, the variables aren't there, and when I try to add variables, to like.....sshd_config....there's the same delay.




70 seconds till I'm given the shell prompt and 30 seconds to exit my session.
# 2  
Old 02-18-2016
So, a couple of questions first.

#1. what file system are you using? UFS or ZFS?
I've seen excessive zfs snapshots cause something similar.

#2. Is this a virtual machine or a actual Sparc server OS?
I've seen memory issues where a zone has utilized all the memory allocated to global zone.

#3. Is there a db running on this server?
again, memory issues but this time caused by an improperly configured DB.
Last edited by os2mac; 02-18-2016 at 08:26 AM.. Reason: completeness
# 3  
Old 02-18-2016
The file system is UFS, it is a virtual machine, and there isn't a database running on this server.

---------- Post updated at 08:31 AM ---------- Previous update was at 08:29 AM ----------

It is part of a lab environment. It is one of 5 virtual machine servers that gives the issue. One of the servers does indeed have a database installed on it.

---------- Post updated at 08:31 AM ---------- Previous update was at 08:31 AM ----------

not 5...but 4 servers...sorry that was a typo
# 4  
Old 02-18-2016
ok, just trying to understand the environment here...

are they zones on the same global zone?

also try ssh -vvv $host

that might give you an idea of where the delay lies...
# 5  
Old 02-18-2016
same global zone.
Okay so here there environment
there are 4 servers.
2 of which are running Sunos 5.10 on VMWARE esx
1 of which is running windows on vmware esx (no ssh or telnet issues)
1 which is a Sunos 5.10 server, but not a virtual machine.
All Sunos 5.10 installations in this lab gives a delay when we telnet or ssh to them.
The prompt takes 70 seconds before it loads.
When it's time to 'exit' it takes about 30 seconds.
A lot of sites are pointing to DNS issues, but when I try to correct the issues the way they describe, it doesn't fix it.

Been told it is most likely a program causing this problem.
Don't have a clue how to investigate. Smilie
# 6  
Old 02-18-2016
easiest way to troubleshoot if it's DNS related would be to ssh directly to the IP rather than the host name.

If the two VM's and the physical server are both having the same issue, and assuming they are all configured the same way. Then I agree it might be a DNS configuration issue.

if it was just one machine having the issue or if you have some application running on all the Solaris hosts then I would see it being an application issue.

again I would recommend running ssh -vvv to see where the delay lies, I would also recommend attempting to ssh directly to the IP to rule out DNS.
# 7  
Old 02-18-2016
Code:
OpenSSH_7.1p2 Debian-1, OpenSSL 1.0.2e 3 Dec 2015
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to **.**.*.*** [**.**.*.***] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.1p2 Debian-1
debug1: Remote protocol version 2.0, remote software version Sun_SSH_1.1.5
debug1: no match: Sun_SSH_1.1.5
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.86.3.225:22 as 'root'
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /root/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from **.**.*.***
debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@openssh.com,ssh-rsa
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa-cert-v01@openssh.com,ssh-rsa...01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128...lysator.liu.se
debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128...lysator.liu.se
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm...60@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm...60@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: first_kex_follows 0 
debug2: reserved 0 
debug2: kex_parse_kexinit: gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==,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-ctr,aes128-cbc,arcfour,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
debug2: kex_parse_kexinit: aes128-ctr,aes128-cbc,arcfour,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: i-default
debug2: kex_parse_kexinit: i-default
debug2: first_kex_follows 0 
debug2: reserved 0 
debug1: kex: server->client aes128-ctr hmac-sha1 none
debug1: kex: client->server aes128-ctr hmac-sha1 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<7680<8192) sent
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 2057/4095
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:gA3HY1j9GyCpeP7n5IHNq602olgE1SlBZj5nwfyeF7U
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /root/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from **.**.*.***
debug1: Host '**.**.*.***' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug2: bits set: 1953/4095
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: /root/.ssh/id_rsa ((nil)),
debug2: key: /root/.ssh/id_dsa ((nil)),
debug2: key: /root/.ssh/id_ecdsa ((nil)),
debug2: key: /root/.ssh/id_ed25519 ((nil)),
debug1: Authentications that can continue: gssapi-keyex,gssapi-with-mic,publickey,password,keyboard-interactive
debug3: start over, passed a different list gssapi-keyex,gssapi-with-mic,publickey,password,keyboard-interactive
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-keyex
debug3: remaining preferred: gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-keyex
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug2: we did not send a packet, disable method
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: 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 Kerberos credentials available

debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug1: Unspecified GSS failure.  Minor code may provide more information


debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

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: /root/.ssh/id_rsa
debug3: no such identity: /root/.ssh/id_rsa: No such file or directory
debug1: Trying private key: /root/.ssh/id_dsa
debug3: no such identity: /root/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /root/.ssh/id_ecdsa
debug3: no such identity: /root/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /root/.ssh/id_ed25519
debug3: no such identity: /root/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 1
Password: 
debug1: Authentication succeeded (keyboard-interactive).
Authenticated to **.**.*.*** ([**.**.*.***]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Entering interactive session.
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug1: Sending environment.
debug3: Ignored env XDG_VTNR
debug3: Ignored env SSH_AGENT_PID
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env TERM
debug3: Ignored env SHELL
debug3: Ignored env XDG_MENU_PREFIX
debug3: Ignored env VTE_VERSION
debug3: Ignored env QT_LINUX_ACCESSIBILITY_ALWAYS_ON
debug3: Ignored env GJS_DEBUG_OUTPUT
debug3: Ignored env WINDOWID
debug3: Ignored env GJS_DEBUG_TOPICS
debug3: Ignored env GTK_MODULES
debug3: Ignored env USER
debug3: Ignored env LS_COLORS
debug3: Ignored env QT_ACCESSIBILITY
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env USERNAME
debug3: Ignored env PATH
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env XDG_SESSION_TYPE
debug3: Ignored env PWD
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env GDM_LANG
debug3: Ignored env GDMSESSION
debug3: Ignored env SHLVL
debug3: Ignored env XDG_SEAT
debug3: Ignored env HOME
debug3: Ignored env GNOME_DESKTOP_SESSION_ID
debug3: Ignored env XDG_SESSION_DESKTOP
debug3: Ignored env LOGNAME
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env WINDOWPATH
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env DISPLAY
debug3: Ignored env XDG_CURRENT_DESKTOP
debug3: Ignored env XAUTHORITY
debug3: Ignored env _
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 99 id 0
debug2: PTY allocation request accepted on channel 0
debug1: Remote: Missing locale support for LANG=en_US.UTF-8
debug2: channel 0: rcvd adjust 196928
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Last login: Wed Feb 17 15:46:31 2016 from ***.**.***.***
Oracle Corporation      SunOS 5.10      Generic Patch   January 2005

Last edited by DukeNuke2; 02-18-2016 at 09:02 AM..
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