Category Archives: Computing

Hardware, software, computer science and the rest

My Keyboard is shouting

Posted on 20 July, 2011 by Matthias Scheler

When I came home from work on monday I couldn’t login into my computer because all the letters i typed came out in uppercase. I pressed the caps lock and all the shift keys multiple times which had no effect. … Continue reading →

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Using S.M.A.R.T. under NetBSD

Posted on 10 July, 2011 by Matthias Scheler

NetBSD has supported S.M.A.R.T. for a long time. But this functionality is well hidden. You can enable S.M.A.R.T. and check a single disk like this: # atactl wd0 smart enable SMART supported, SMART enabled # atactl wd0 smart status SMART … Continue reading →

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Automated attacks against Postfix

Posted on 13 June, 2011 by Matthias Scheler

Yesterday evening I discovered thousands of lines like these in my server’s mail logfile: Jun 12 08:58:37 colwyn postfix/smtpd[25605]: warning: unknown[212.154.6.176]: SASL CRAM-MD5 authentication failed: PDM3MjM3NzE1Mzk1NjU1MDEuMTMwNzg2NTUxNUBjb2x3eW4uemhhZHVtLm9yZy51az4= Jun 12 08:58:44 colwyn postfix/smtpd[25605]: warning: unknown[212.154.6.176]: SASL CRAM-MD5 authentication failed: PDU0MDA0NDczMjgzNjU2NDAuMTMwNzg2NTUyMkBjb2x3eW4uemhhZHVtLm9yZy51az4= […] Jun … Continue reading →

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