News archive September 2007 - Koos van den Hout

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2007-09-27 (#) 12 years ago
Ik heb vanavond iets aparts gedaan in Asterisk : ik heb er een echt telefoongesprek met een echt mens mee gevoerd! Na alle testen wilde ik wel eens weten of het routeren van een extension naar een telefoontoestel (ok, een softphone) werkte. Het werkte in een keer ;)

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2007-09-27 (#) 12 years ago
Een simpele vraag waarom doe je niet het weerbericht? toen ik me afvroeg wat ik nog meer kon doen in Asterisk heb ik nu beantwoord met Asterisk metar weerbericht. Nu nog in het engels, omdat de weertermen in het engels zijn en omdat nederlands voor festival nog erg in ontwikkeling is.

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2007-09-25 (#) 12 years ago
About one and a half hour later, ntp.cs.uu.nl peaked at 1000.60 packets/second.

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2007-09-25 (#) 12 years ago
I'm a timegeek, and part of that is making our timeserver at work perform great in the NTP Pool project. With the recently updated pool dns system, servers that have more upstream bandwidth get more clients. We have been ogling our ntp stats for ntp.cs.uu.nl a lot seeing how the client count is through the roof (the internal data structures of ntp can't count beyond 3500 clients without serious hacking) and traffic is rising seriously lately. Still waiting for the first time we get over 1000 packets/second ntp traffic. Our ntp server has no problem at all dealing with this.

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2007-09-25 (#) 12 years ago
Mijn Asterisk projecten hebben allemaal eigen paginas waar scripts en uitleg staan. Even een overzichtje: project 002: sprekende klok, bel een podcast en project belspel: hou bellers aan de lijn bezig. Sommige dingen zijn een beetje 'af' (maar kunnen natuurlijk nog verbeterd worden), andere projecten zijn net aan wild idee. Reacties zijn welkom.

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2007-09-20 (#) 12 years ago
I visited a HP Procurve seminar yesterday about network security. Interesting talks, including one by the HP Procurve security architect. I had a chat with him about network loops which took down the university network a few times recently and he told me that HP Procurve switches now offer loop protection which would detect loops (even the ones that spanning tree would 'miss' because some older equipment may silently drop spanning tree packets), shutdown the originating port and report the error. The security architect told me that unauthorized loops and rogue dhcp servers are the major problems in university networks, and I agree. I found a weblog entry describing the HP Procurve loop protection very nicely.

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2007-09-16 (#) 12 years ago
I kept seeing things in the logs like Sep 16 05:52:39 gosper named[779]: denied query from [143.215.129.200].22632 for "www.capitalone.com" A/IN, all from 143.215.129.200, 143.215.129.102, 143.215.129.43 without any explanation to be found on the web. The name guesses some sort of study of DNS answers, and all queries seem to be for phishing targets, but several thousand answers "your query was denied" doesn't make them stop asking. Solution: iptables -t filter -I INPUT 8 -j REJECT --source 143.215.129.0/24 --protocol udp --dport 53 --reject-with icmp-admin-prohibited. Mail to noc@ was never answered.

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2007-09-13 (#) 12 years ago
Wardrive results 31 August (I missed a few days when they fell out of the WiGLE upload stats) to 12 September: 618 new networks with gps locations. Not much, due to me mostly being on the recumbent bike (which has no place to mount the gps module and extra antenna yet) and I'm still learning cycling in the city with the recumbent.

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2007-09-08 (#) 12 years ago
I bought my own recumbent bike (ligfiets), a Nazca Pioneer. I was thinking about it anyway, the holiday trip only made those thoughts more serious and now the ligfietser.nl shop is closing so I got a nice deal on the bike I rode around with during my holiday. The bike was still adjusted to my length so I guess I have been the only renter.

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2007-09-06 (#) 12 years ago
Printing manpages in nice postscript is something I do very rare, so I always forget the right incantation. The last time I had to use it was when I still had a Solaris desktop. Anyway, wanted to do it today from a redhat manpage source. Google found me Printing manpages .. and I adjusted the command to be: gzip -dc dhcpd.conf.5.gz | groff -t -e -mandoc -Tps | lpr.

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2007-09-06 (#) 12 years ago
Timegeeks who can make the serious commitment towards being a long-time ntp pool member but don't have the hardware available to pick that last nanosecond of precision from the sky should peek at this announcement: Meinberg is donating some really great timekeeping equipment to the ntp pool project and it will be available to a pool member.

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2007-09-05 (#) 12 years ago
I was trying some stuff in Asterisk yesterday evening and I got weird errors on trying the command MP3Player with a podcast mp3. The error message was NOTICE[2925] app_mp3.c: Poll timed out/errored out with 0. Trying mpg123 0.59r by hand on that file showed what went wrong: it gives a segfault, probably on the weird id3v1 / id3v2 tags. Solution: id3v2 -D thepodcast.mp3 which strips all id3 tags. After that the dail-a-podcast idea worked.

The scripts for this are available (with Dutch comments): Asterisk podcast per telefoon.

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, reachable as koos+website@idefix.net. PGP encrypted e-mail preferred.

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