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This article mainly introduces "how to solve the problem of slow Linux server-side SSH remote connection speed". In daily operation, I believe many people have doubts about how to solve the problem of slow Linux server-side SSH remote connection speed. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for everyone to answer "how to solve the problem of slow Linux server-side SSH remote connection speed". Next, please follow the editor to study!

Solution:

1. Change the configuration in the / etc/ssh/sshd_config file on the ssh server to the following:

The code is as follows:

UseDNS no

# GSSAPI options

GSSAPIAuthentication no

Then, execute / etc/init.d/sshd restart to restart the sshd process to make the above configuration take effect, and it is generally not slow to connect.

2. If it is still slow, check whether the corresponding hostname of 127.0.0.1 in the / etc/hosts file on the ssh server is the same as the result of uname-n, or add native ip and hostname (uname-n result) to / etc/hosts.

The code is as follows:

[root@C64 ~] # uname-n

C64

[root@C64 ~] # cat / etc/hosts

# modi by oldboy 11:12 2013-9-24

127.0.0.1 C64 localhost localhost.localdomain localhost4 localhost4.localdomain4

:: 1 localhost localhost.localdomain localhost6 localhost6.localdomain6

10.0.0.18 C64

#

Use the debugging function of ssh-v to find the cause of the slow

In fact, you can debug the details of why it is slow with the following command (it is important to learn this idea).

The code is as follows:

[root@C64] # ssh-v root@10.0.0.19

OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010

Debug1: Reading configuration data / etc/ssh/ssh_config

Debug1: Applying options for *

Debug1: Connecting to 10.0.0.19 [10.0.0.19] port 22.

Debug1: Connection established.

Debug1: permanently_set_uid: 0/0

Debug1: identity file / root/.ssh/identity type-1

Debug1: identity file / root/.ssh/id_rsa type-1

Debug1: identity file / root/.ssh/id_dsa type-1

Debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3

Debug1: match: OpenSSH_4.3 pat OpenSSH_4*

Debug1: Enabling compatibility mode for protocol 2.0

Debug1: Local version string SSH-2.0-OpenSSH_5.3

Debug1: SSH2_MSG_KEXINIT sent

Debug1: SSH2_MSG_KEXINIT received

Debug1: kex: server- > client aes128-ctr hmac-md5 none

Debug1: kex: client- > server aes128-ctr hmac-md5 none

Debug1: SSH2_MSG_KEX_DH_GEX_REQUEST (1024 Old Boy teacher Review: here is the interactive prompt for password input.

Debug1: Authentication succeeded (password).

Debug1: channel 0: new [client-session]

Debug1: Entering interactive session.

Debug1: Sending environment.

Debug1: Sending env LANG = en_US.UTF-8

Last login: Tue Sep 24 10:30:02 2013 from 10.0.0.18

If you are slow to connect remotely, you can determine where the card is.

The code is as follows:

[root@C64_A] # ssh-v oldboy@10.0.0.17

OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010

Debug1: Reading configuration data / etc/ssh/ssh_config

Debug1: Applying options for *

Debug1: Connecting to 10.0.0.17 [10.0.0.17] port 22.

Debug1: Connection established.

Debug1: permanently_set_uid: 0/0

Debug1: identity file / root/.ssh/identity type-1

Debug1: identity file / root/.ssh/id_rsa type-1

Debug1: identity file / root/.ssh/id_dsa type 2

Debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3

Debug1: match: OpenSSH_5.3 pat OpenSSH*

Debug1: Enabling compatibility mode for protocol 2.0

Debug1: Local version string SSH-2.0-OpenSSH_5.3

Debug1: SSH2_MSG_KEXINIT sent

Debug1: SSH2_MSG_KEXINIT received

Debug1: kex: server- > client aes128-ctr hmac-md5 none

Debug1: kex: client- > server aes128-ctr hmac-md5 none

Debug1: SSH2_MSG_KEX_DH_GEX_REQUEST (1024

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