main September 2008

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37 participants
43 discussions

SSH - something I don't understand.
by Barry Samuels 02 Sep '08

02 Sep '08

My SSH is set up to work via a key only i.e. no logins. I can use SSH from my laptop to connect to my desktop over my home network with no problems however if I try it via the Internet, when away from home, I get 'access denied (Publickey)'. Would there be a known reason for that? -- Barry Samuels http://www.beenthere-donethat.org.uk The Unofficial Guide to Great Britain

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Re: [ALUG] SSH - something I don't understand.
by Barry Samuels 01 Sep '08

01 Sep '08

I have only just realised that the last two posts I had intended for the list were actually sent to Brett Parker by mistake. I wondered why they didn't appear in the list. :-)) The problem is now solved. There was a 'Host' section in the /etc/ssh/ ssh_config file on the laptop which started 'Host desktophostname' and changing that to 'Host desktophostname 192.168.0.1 123.234.345.456' cured the problem. 123.234.345.456 would be the IP address I use to connect, via the Internet, to my desktop at home when I'm away. I discovered that because if I changed the SSH command to use an IP address, even from my home network, instead of a host name I had the same problem. Brett suggested looking in the ssh_config file 'Host' section. I'd like to thank everyone who tried to help including ChrisG with his remarkable vocal powers (if Brett is to be believed). -- Barry Samuels http://www.beenthere-donethat.org.uk The Unofficial Guide to Great Britain

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Re: [ALUG] What to do after being hacked?
by Sagr 01 Sep '08

01 Sep '08

Thanks to MJR, Wayne, Adrian, Dan and others who offered advice. We have now finished rebuilding my friend’s server and now the dust has settled and the anger and frustration has died down we have to admit it has not been a totally bad experience. It provided us with a good excuse, and opportunity, to reinstall everything from the ground up and made us realise what an enormous collection of no-longer-used scripts he had collected on his old machine; they were very handy at the time he installed them but he had forgotten to remove them once the need had passed. I guess it has taught us, through experience, that just because my friend updated his operating system nightly we should not assume that EVERYTHING is updated and safe as old, no longer unused, no longer supported, scripts installed for a particular one-off task and then forgotten about can easily be overlooked but become an easy target for hackers. I have a separate question about our experience but I had better start a new thread for that. Thanks to all for your wise advice, Sagr.

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main September 2008