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A common problem with Linux systems is when Windows users press CTRL-ALT-DEL at the login prompt and reboot the machine. To fix this some people change the ^ca line in /etc/inittab to just disable the reboot function. However this is not desirable because sometimes you want to reboot a machine with a simple keypress. Another […] Today I was doing some network tracing and figured out how to track the start and end of TCP connections. The following tcpdump command will get all SYN, FIN, and RST packets on port 80 and all ICMP packets: tcpdump -i bond0 -n “port 80 and tcp[tcpflags] & (tcp-syn|tcp-fin|tcp-rst) != 0 or icmp” Also recently […] Sendmail is the most prevalent Unix MTA. It is the oldest MTA and is still one of the most powerful ones that are available. However it has never been known for being secure. http://lwn.net/Articles/176596/ Most of it’s bad reputation comes from regularly having serious security holes. The above URL has the most recent one. Neither […] Here’s an interesting blog entry comparing SE Linux and AppArmor. It has some amusing comments, one of which I used for the title of this entry. There are two things I don’t like about AppArmor. One is that it doesn’t label Inodes but instead bases it’s access control on file names. This means that renaming […] Yesterday Erich Schubert blogged about reducing Debian SE Linux work due to lack of hardware. To solve such problems I’ve put a Debian/unstable machine on the net and given Erich the root password. Also now I am starting work on Debian SE Linux again too. There should be some significant developments in Debian SE Linux […] In regard to my post yesterday about Planet Debian I received the following response: James Purser said I’m betting that your feed is an atom feed. We had the same problem on PLOA with Jeff and Pias feeds when they switched to atom. Planet needs to be upgraded. Well I am using an atom feed, […] To get the maximum value out of my writing when I am asked a question that is of general interest in private mail I will (without in any way identifying the person or giving any specifics of their work) blog my reply. I hope that not only will this benefit the general readers, but also […] Dutch police arrested 12 people for acting suspiciously on a flight to India. A passenger said “They were not paying attention to what the flight attendents were saying”, I don’t pay attention to the flight attendents either. When you fly more than 10 times a year you learn how to do up your seat-belt and […] Today (well yesterday as of 30 minutes ago) I spoke at the Open Source Symposium in Melbourne. This is an event sponsored by Red Hat. The first day was the business day and the second day was the Red Hat developers day. I attended both days and spoke on the second day (today). My talk […] In the game show The Weakest Link competitors get voted off, usually not on whether they are weak but on whether the other contestents consider them to be a threat. It’s mildly amusing as a TV game show but not funny at all when carried out on an airline. Recently a flight from Malaga to […] |
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