Technology Services

Author: doachs

  • SpamAssassin and Horde’s IMP

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    doachs

    Unfortunately due to the way that Horde’s IMP webmail system inserts the IP address that was used to connect to the it in the email headers it sends, SpamAssassin thinks those messages are coming from dynamic ip addresses. To help work around this issue, I modified our SpamAssassin rules such that any email sent via…

  • Horde Imp and Spamassassin

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    doachs

    Unfortunately it looks like Horde’s Imp webmail system and SpamAssassin don’t agree on how to deal with dynamic ip addresses sending email. If you connect to a webmail system running running Imp and send a message using your home web browser on a cable modem connection, that ip address gets loged in the headers of…

  • Gibbs, Sorensen, North

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    doachs

    Gibbs, Sorensen, and North were down for about 3 hours from 5:15pm to 8:15pm due to a strange network problem. Some device in one of those dorms caused almost all of our network traffic on the res hall subnet to be very slow.

  • SpamAssassin Upgrade

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    doachs

    After testing the latest version of Spamassassin on my account for the past few days, I have upgraded all our Spamassassin servers from 3.0.0 to 3.0.2. 3.0.2 includes a few bug fixes and other small enhancements. If anyone notices a drastic change in spam checking effectiveness, please let me know.

  • Squid on Fedora Core 3

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    doachs

    Due to the way SELINUX is setup on Fedora Core 3 ( FC3 ) I discovered that if you try to move squid’s cache directory, you must tell SELINUX that the new location is ok. To do that, use the following command: chcon -R system_u:object_r:squid_cache_t /directory/where/cache-is

  • Learned Something New

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    doachs

    As anyone who as worked with Linux, iptables, and ftp knows, firewalls and ftp can cause issues. I already knew that if I was using iptables I should use the ip_conntrack_ftp kernel module. So I had added “insmod ip_conntrack_ftp” to the /etc/rc.local file so it was inserted at boot. However what I didn’t think about…

  • Spamassassin 3.02

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    doachs

    Spamassassin 3.02 was released last month. Not much new in there but in an attempt to always run the latest and greatest stable spamassassin code, I have upgraded a test server and am using it on my account. If all goes well, I will upgrade the rest of the servers to the newest version soon.

  • Charter blocking port 25

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    doachs

    This is only a rumor, but I heard that last week Charted started blocking port 25 for home users on their Cable internet service in Mankato. This will probably cause a few problems for our users but there are ways of working around it securely. So all in all, this is a good thing.

  • Campus Network Outage

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    doachs

    FYI, in case you didn’t notice, at about 10:35am today our core network router rebooted. That caused all network traffic on our network to temporarily stop flowing.

  • Rebooting Solen

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    doachs

    Although solen has been workin great for the past 180+ days, it looks like we have no choice but to reboot it. If you are wondering why, the reason is that netatalk has stoped working. Restarting the netatalk daemon does not appear to fix it. For some reason the afpd process just gets stuck. Hopefully…