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I have a problem with ssh. I reinstalled Suse 8.0 and I have a problem with ssh'ing some computers (strangely some other work), which I did not have before.

I always reveive a "ssh_exchange_identification: Connection closed by remote host", when ssh'ing certain machines.

You will get this message when your host is not allowed with tcp_wrappers, hope this helps

You didn't backup your old ssh configuration? Then at least the host keys and probably the configuration settings have changed. It could be that other hosts refuse connections since your host id is changed and they think someone is doing a man-in-the-middle attack. Perhaps? Differences in default authentication methods and those required by various hosts could be a reason too - I guess...