James Stephens

Following on from the announcement of a renewed commitment to Linux by Linksys-Cisco and the release of the Linux-compatible WRT54GL Wireless-G series broadband router (discussed here), this post details how to run Iptables on a Linksys-Cisco WRT54GL router via firmware from DD-WRT. A fully functional example Iptables script is provided to get you started.
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In a recent post some advantages were discussed in using Partimage over g4u and Symantec Ghost. Following on from that, example scripts and a simple methodology are provided below to backup and restore Linux partitions using partimage run from a client system, to a remote server running partimaged.
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This post talks about some of the problems and solutions myself and other staff have discovered in trying to Ghost/image/clone Linux systems using Symantec Ghost, g4u, and Partimage.
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This post details a way to script partition creation under Linux using fdisk. I was originally trying to use sfdisk to perform this task as it is designed to be scriptable, reading lines of the form

where each line fills one partition descripton. The problem for me was that sfdisk only appears to accept partition sizes defined in cylinders; for partitioning similar sized disks with different geometries this is inconvenient.
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I have recently disabled Spamassassin’s autowhitelist feature.
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Fldiff is a useful and simple to use graphical differencing program that supports file, directory, CVS, and Subversion diff viewing.
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This post details how to add a custom header in Mimedefang. It’s purpose here is to tag email from which attachments are removed, making it easier for spamassassin to identify and operate on such messages.
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Mozilla Thunderbird possesses excellent junk mail controls which through Bayesian analysis of your email and careful training are capable of learning which messages are ham and which messages are spam.
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This post describes how to perform in-place editing of a file using Perl.
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The default behaviour of Mozilla/Firefox is to open Postscript files within the browser. This post details how to change that behaviour so that they open in a separate application window.
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This post documents a workaround I have put in place in spamassassin for the increasing amount of spam being receiving to the spoofed address all@ourdomain. Some users are receiving over 20 such messages a day .. all spam. The workaround is equally relevant for other addresses where mail isn’t expected from offsite.
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The default behaviour of Mozilla/Firefox is to open PDF files within the browser. This post details how to change that behaviour so that they open in a separate application window.
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I have seen posts in a number of online forums to the effect that a couple of rules in the default Iptables firewall configuration under Fedora and Redhat Enterprise Linux are causing confusion.
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If you use procmail to filter messages, setup vacation email response via your /home/USER/.procmailrc rather than the vacation program.
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If you have different versions of Linux served by a common compiler, you will have problems. This crops up for us from time to time with the PGI compiler suite.
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