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SSH Parameters

Posted on 2013-01-17
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Last Modified: 2013-01-30
There is  script in Linux to test the connection :

ssh -f -L 3307:127.0.0.1:3306 hkadmin@192.168.1.41 -p 22 sleep 60 &> /dev/null &

1. What do 3307 & 3306 represent ?
2. What does the parameter -f , -L & -p represent ?

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Question by:AXISHK
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theras2000 earned 2000 total points
ID: 38790244
3307 is the port that other computers will connect to you on and 3306 is the port that you'll forward their request to.  I could explain more but I'd just be retyping this great tutorial.
http://support.suso.com/supki/SSH_Tutorial_for_Linux
Jump down to the TCP Port Forwarding  section.

Here's another reference:
http://linux.about.com/od/commands/l/blcmdl1_ssh.htm
ssh [-afgknqstvxACNTX1246 ] [-b bind_address ] [-c cipher_spec ] [-e escape_char ] [-i identity_file ] [-l login_name ] [-m mac_spec ] [-o option ] [-p port ] [-F configfile ] [-L porthosthostport ] [-R porthosthostport ] [-D port ] hostname | user@hostname [command ]

You can see that -f tells it to hide the password by running it in the background.
-L is to specify that your host and ports are coming next.
-p is the destination port on the remote host, but judging by the 1st tutorial, I don't think it should be used in your example, with port forwarding.
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by:AXISHK
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