12-07-2011
Quote:
Originally Posted by
Twirlip
SSH2_MSG_KEXINIT (key exchange initialization) is the first part of the SSH key exchange, as described here (space added because I am not allowed to post links):
http ://tools.ietf.org/html/rfc4253#section-7.1
Having said that, are you sure this isn't a DNS problem? Delays like this can be caused by the server trying to do a DNS lookup, but getting a timeout. Often this is for logging purposes, so you may be able to prevent it by telling the server to log IP addresses instead of DNS names.
Think so, I suppose that it can be suppressed by disabling reverse DNS lookup for sshd daemon.
You can try add line "UseDNS no" into /etc/ssh/sshd_config file.
If you would like to switch off using DNS lookup for sshd at all you should probably add appropriate option to ssh SMF manifest and then refresh service configuration.
10 More Discussions You Might Find Interesting
1. Linux
Hi,
I have a Linux 8.0 Redhat installed as a server. The samba configuration was done to allowed logging in to the server from windows workstations. I have a LAN, WAN connection. However, any time the workstation is trying to make a WAN connection it slow down all the systems on the network.
Can... (0 Replies)
Discussion started by: kayode
0 Replies
2. SCO
I have attempted to2find answers to this question:
When logging into tty01 the system will take 5 to 10 seconds to display each character typed. Each other terminal will login correctly and display correctly2but not the first terminal. Rebooting was suggested on several sites and this has been... (2 Replies)
Discussion started by: ypanic
2 Replies
3. HP-UX
We recently moved from a Open VMS OS to HP-UX. When printing labels on Intermec 3400 printers we are seeing a delay of up to 3 minutes before labels print. We have printers going through a DEC Term servers and Jet Direct boxes. Any suggestions what might be causing this delay? (4 Replies)
Discussion started by: BIGJIM
4 Replies
4. Solaris
Hi Folks
My Sun Solaris servers are waiting for a long time after keying in the User-ID. There is a big delay in getting to the password prompt. But once the password is keyed in,it goes through in a second.
The servers in which i am facing this issue is an NIS client. But i am facing this... (7 Replies)
Discussion started by: Hari_Ganesh
7 Replies
5. Solaris
Hi,
We have got 2 solaris boxes, since our inhouse application has certified on solaris environment and now we need to certify the performance of that application on Solaris environment.
1 box we have installed websphere and the other box we have installed Oracle 10.2.0.3. both are 64bit.
... (5 Replies)
Discussion started by: mp_rocket
5 Replies
6. Solaris
Hi
I have a Solaris 10 NIS server and more than 250 NIS clients out of these there are 5 main application servers, and whenever there is any compilation happens on any of the application servers (which are acting as NIS clients) entire NIS performance will come down.Can some one help me to fix... (5 Replies)
Discussion started by: nithnara
5 Replies
7. Solaris
Hi!
I have a m3000 server with solaris 10. Clients connecting to server using Xmanager. But when they open a Java based application its very slow and some times hanging. But when I tried with VNC it works fine. Is this a BUG in Xmanager? Or Is there any method to solve this?
Thanks,
Charith (3 Replies)
Discussion started by: charith.upendra
3 Replies
8. Solaris
Need assitance in troubleshooting steps . Below is the issue
I have LDOM which has 4 zones on it . One zone logging into the server takes 13sec where as other zones are quick .
Troubleshooting steps which I did
- Checked /var/tmp . Not many files
- We have LDAP but thought that wouldnt be... (7 Replies)
Discussion started by: ajayram_arya
7 Replies
9. AIX
Oracle database is facing slowness issues frequently on AIX server. So can anybody suggest how to fix these issues from OS end? Do we need to tune any parameter in AIX to resolve this issue?
Please post in an adequate forum! (1 Reply)
Discussion started by: vithal
1 Replies
10. UNIX for Beginners Questions & Answers
Hi,
I want to validate ssh connection one after one for multiple servers..... password less keys already setup but now i want to validate if ssh is working fine or not...
I have .sh script like below and i have servers.txt contains all the list of servers
#/bin/bash
for host in $(cat... (3 Replies)
Discussion started by: sreeram4
3 Replies
LEARN ABOUT CENTOS
ipa-replica-install
ipa-replica-install(1) IPA Manual Pages ipa-replica-install(1)
NAME
ipa-replica-install - Create an IPA replica
SYNOPSIS
ipa-replica-install [OPTION]... replica_file
DESCRIPTION
Configures a new IPA server that is a replica of the server that generated it. Once it has been created it is an exact copy of the original
IPA server and is an equal master. Changes made to any master are automatically replicated to other masters.
The replica_file is created using the ipa-replica-prepare utility.
If the installation fails you may need to run ipa-server-install --uninstall before running ipa-replica-install again.
The installation will fail if the host you are installing the replica on exists as a host in IPA or an existing replication agreement
exists (for example, from a previously failed installation).
A replica should only be installed on the same or higher version of IPA on the remote system.
OPTIONS
BASIC OPTIONS
--setup-ca
Install and configure a CA on this replica. If a CA is not configured then certificate operations will be forwarded to a master with
a CA installed.
--ip-address=IP_ADDRESS
The IP address of this server. If this address does not match the address the host resolves to and --setup-dns is not selected the
installation will fail. If the server hostname is not resolvable, a record for the hostname and IP_ADDRESS is added to /etc/hosts.
-p DM_PASSWORD, --password=DM_PASSWORD
Directory Manager (existing master) password
-w ADMIN_PASSWORD, --admin-password=ADMIN_PASSWORD
Admin user Kerberos password used for connection check
--mkhomedir
Create home directories for users on their first login
-N, --no-ntp
Do not configure NTP
--no-ui-redirect
Do not automatically redirect to the Web UI.
--ssh-trust-dns
Configure OpenSSH client to trust DNS SSHFP records.
--no-ssh
Do not configure OpenSSH client.
--no-sshd
Do not configure OpenSSH server.
--skip-conncheck
Skip connection check to remote master
-d, --debug
Enable debug logging when more verbose output is needed
-U, --unattended
An unattended installation that will never prompt for user input
CERTIFICATE SYSTEM OPTIONS
--skip-schema-check
Skip check for updated CA DS schema on the remote master
DNS OPTIONS
--setup-dns
Generate a DNS zone if it does not exist already and configure the DNS server. This option requires that you either specify at
least one DNS forwarder through the --forwarder option or use the --no-forwarders option.
--forwarder=IP_ADDRESS
Add a DNS forwarder to the DNS configuration. You can use this option multiple times to specify more forwarders, but at least one
must be provided, unless the --no-forwarders option is specified.
--no-forwarders
Do not add any DNS forwarders. Root DNS servers will be used instead.
--reverse-zone=REVERSE_ZONE
The reverse DNS zone to use
--no-reverse
Do not create new reverse DNS zone. If a reverse DNS zone already exists for the subnet, it will be used.
--no-host-dns
Do not use DNS for hostname lookup during installation
--no-dns-sshfp
Do not automatically create DNS SSHFP records.
EXIT STATUS
0 if the command was successful
1 if an error occurred
3 if the host exists in the IPA server or a replication agreement to the remote master already exists
IPA
May 16 2012 ipa-replica-install(1)