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openSSH changed in tiger
Authored by: jvl001 on Jun 22, '05 04:42:21PM

If you are experiencing very slow logins (>30s) then it is likely a DNS reverse-lookup issue.
If you are experiencing slow, but not too slow, logins (~6s) and you use X11 forwarding then it is likely xauth holding things up.
(You can see exactly where the pause is by using 'ssh -vvv remotehost'.)

To switch to trusted X11 forwarding, you can permanently alter your /etc/ssh_config file as root. Thus you can avoid constantly using the -Y or -X option. You can even specify the style of X11 authentication by remote host name:

# Example /etc/ssh_config file
# Example of trustworthy hosts (with wildcards)
Host * host???
ForwardX11Trusted yes
# Example of X11 forwarding but without trust (for all other hosts)
Host *
ForwardX11 yes

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openSSH changed in tiger
Authored by: BobHarris on Sep 06, '05 05:27:09PM

This trick also works if you are a Tarantella user.

Our company uses Tarantella to get faster cross country X-Windows performance (I'm in New Hampshire, and my test system is in Texas).

With Mac OS X 10.3 (Panther), tarantella was fast. But then I upgraded to Tiger, and performance was worst than a regular X-Windows connection.

I had figured out that Tarantella was using ssh, but I could not modify the binary to use ssh -Y when making a connection from my workstation to the test system.

When I added ForwardX11Trusted to my PowerMac's $HOME/.ssh/config my Tarantella performance returned.

Bob harris

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