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SSH Client - Mac OS X Lion
SSH Server - Debian

/etc/hosts on Mac -> [IP of Debian] mydebian
Public key of Mac has already been put to authorized_key in root@mydebian:/root/.ssh
'UseDNS no' has been put to root@mydebian:/etc/ssh/sshd_config and then SSH server restarted

ssh root@mydebian -> wait for a long time to login
ssh -v root@mydebian -> no delay at all

Any ideas?

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2  
Any interesting output with -v / -vvv? –  Daniel Beck Jan 23 '12 at 9:07
    
Can you format this better? –  gadgetmo Feb 12 '12 at 9:05

2 Answers 2

up vote 2 down vote accepted

Set the following value in /etc/ssh_config:

AddressFamily inet 

(You can set it in ~/.ssh/config as well.)

The reason is that ssh is trying to do IPv6 negotiation, which apparently fails after a timeout, which happened to me after migration to a new Lion (10.7.4) MacBook Pro.

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Can you please check the negative? Put the IP of the source machine in the /etc/hosts and check what happens.

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