Aug 172013

sshI use ssh connections to manage remote servers it’s one of the main task in my work, so over time I’ve learnt some tricks to speed up the connection phase of the ssh protocol, so in this article I’ll show you how to:

Configure ssh to use ipv4 only
Configure ssh to use a particular authentication method
Reuse SSH Connection
Disable the Dns lookup on server side

Also if you are interested in ssh you can take a look at my previous articles about How to keep ssh connections alive on Linux and how to keep a Permanent SSH Tunnels with autossh.
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Nov 212011

Article by already published on their useful  wiki (in Italian)

There are many occasions where you need to create connections to machines and services that are protected by firewalls because it is appropriate to adequately protect them, but for which the creation of a VPN becomes an excessive burden.

For this reason, the ability to port forwarding via SSH is very useful for creating an encrypted tunnel from one machine to another, allowing you to enable only local access (such as a MySQL only listens locally) safely, with the only the problem that in case of problems, the SSH connection (and its tunnels) could fall.

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