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Delay when trying to SSH to the system

I encountered a delay of about 5-6 seconds when I try to transfer ssh from the system to the friends system. Here is the verbose output of the command:

zeus@athena:~$ ssh -v ashwin@192.168.40.211
OpenSSH_5.3p1 Debian-3ubuntu7, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 192.168.40.211 [192.168.40.211] port 22.
debug1: Connection established.
debug1: identity file /home/zeus/.ssh/identity type -1
debug1: identity file /home/zeus/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/zeus/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.0p1 Debian-3ubuntu1
debug1: match: OpenSSH_6.0p1 Debian-3ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu7
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<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host '192.168.40.211' is known and matches the RSA host key.
debug1: Found key in /home/zeus/.ssh/known_hosts:71
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received

<---- delay 4-5 seconds------>


debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/zeus/.ssh/identity
debug1: Offering public key: /home/zeus/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/zeus/.ssh/id_dsa
debug1: Next authentication method: password

Can someone help me figure out how I can get rid of this delay?

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2 answers

As pointed out in the comments, this could be a DNS problem. There is an article on some steps to try to solve this problem here: http://www.thegeekstuff.com/2010/07/openssh-slow-at-ssh2_msg_service_accept-received/

/etc/sshd_config / UseDNS no, sshd. , !

, UseDNS to no . , DNS, , .

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, , :

https://superuser.com/a/654153/152271

, nslookup (). /etc/hosts , IP/ , .

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