{"id":318,"date":"2008-06-21T11:50:12","date_gmt":"2008-06-21T08:50:12","guid":{"rendered":"http:\/\/www.void.gr\/kargig\/blog\/?p=318"},"modified":"2008-06-21T11:51:01","modified_gmt":"2008-06-21T08:51:01","slug":"speed-up-multiple-ssh-connections-to-the-same-destination","status":"publish","type":"post","link":"https:\/\/www.void.gr\/kargig\/blog\/2008\/06\/21\/speed-up-multiple-ssh-connections-to-the-same-destination\/","title":{"rendered":"Speed up multiple ssh connections to the same destination"},"content":{"rendered":"

When you are doing multiple ssh connections to one host there’s a way to speed them up by multiplexing them. When you open the first network connection a special socket is created and then all other connections to the destination machine pass through the first network connection and don’t open any new ones. All that is done via ControlMaster and ControlPath settings for ssh_config<\/a>.<\/p>\n

Example usage:<\/em>
\nInside \/etc\/ssh\/ssh_config<\/strong>
\nControlMaster auto
\nControlPath \/tmp\/%r@%h:%p
\n<\/code><\/p>\n

Firsh ssh connection:<\/strong>
\n% ssh foobar@foo.bar.gr
\nPassword:
\nLinux foo.bar.gr 2.6.20.1-1-686 #1 SMP Sun Mar 4 12:44:55 UTC 2007 i686 GNU\/Linux
\nfoobar@foo:~$
\n<\/code><\/p>\n

Second ssh connection:<\/strong>
\n% ssh -p 22 foobar@foo.bar.gr
\nLinux foo.bar.gr 2.6.20.1-1-686 #1 SMP Sun Mar 4 12:44:55 UTC 2007 i686 GNU\/Linux
\nfoobar@foo:~$
\n<\/code>
\nNo password is asked and the connection opens up immediately.<\/p>\n

kudos to apoikos<\/a> for telling me about this neat feature in fosscomm<\/a> \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

When you are doing multiple ssh connections to one host there’s a way to speed them up by multiplexing them. When you open the first network connection a special socket is created and then all other connections to the destination machine pass through the first network connection and don’t open any new ones. All that […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"footnotes":""},"categories":[6,5,3,8,4],"tags":[],"class_list":["post-318","post","type-post","status-publish","format-standard","hentry","category-encryption","category-internet","category-linux","category-networking","category-privacy"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t