Pages by Tag
Index of pages filed with the "SysAdmin" tag (listing records 1 to 10 of 12):
- As the Dust Settles...
(Date: Sun 27-Mar-2005 | Comments: 1 | Permalink)
Oh boy, the Urban Mainframe server migration certainly didn't go according to plan. In theory it should have been a simple exercise: copy the MySQL database, CMS and web-server file-system from an aging and under-performing Linux 7.3 server to a new RedHat ... (continue reading) - ModSecurity: Web Server Defences
(Date: Tue 1-Feb-2005 | Comments: 10 | Permalink)
I can't believe I've been ignorant of this module until today. ModSecurity is an open source intrusion detection and prevention engine for web applications. Operating as an Apache web-server module, the purpose of ModSecurity is to increase web application ... (continue reading) - Technical Weblogs
(Date: Tue 25-Jan-2005 | Comments: 10 | Permalink)
I need to feed (pun intended) my hunger for technical weblogs and add a few more feeds to my blogroll. I am particularly interested in weblogs that cover the following topicsSoftware DevelopmentCPerl / mod_perlRuby / RailsApacheDatabases / MySQLUnix ... (continue reading) - One-to-Many File Distribution
(Date: Mon 3-Jan-2005 | Comments: 6 | Permalink)
I recently had to update some CGI scripts duplicated within thirty or so virtual servers on one physical box. The thought of manually FTPing the revised scripts into each website's file-system wasn't a very attractive one. So I wrote a little shell script ... (continue reading) - Web Server Flood Barrier
(Date: Thu 30-Dec-2004 | Comments: 30 | Permalink)
It's safe to say that my last attempt to implement "flood" defences on this web server was, well, disastrous. I installed mod_throttle and brought the server to its knees for around 8 hours. Despite this, ahem, minor setback - I continued to investigate ... (continue reading) - Throttling Down
(Date: Mon 20-Dec-2004 | Comments: 3 | Permalink)
The Urban Mainframe was effectively offline for almost an hour last night when an overly aggressive bot flooded the web-server with more concurrent requests than it can handle. I have now installed the mod_throttle bandwidth and request throttling module ... (continue reading) - Blocking the Referrer Spammer
(Date: Mon 15-Nov-2004 | Comments: 13 | Permalink)
I have mostly passed under the radar of the Referrer Spammers, but my invisibility spell has gradually depleted. This past weekend (13-14 Nov, 2004) my access logs recorded 187 hits from referrer spammers. I'll admit that 187 hits isn't a lot, but I usually ... (continue reading) - Unix Shell on Windows
(Date: Thu 21-Oct-2004 | Comments: 10 | Permalink)
Our Shapeshifter application servers all run some variant of Unix. Whilst working on the servers I spend most of my time in the BASH shell. On my Windows XP desktop computer, I spend a large portion of my time using the DOS shell. The problem is that ... (continue reading) - Remote PC Viewer / Controller
(Date: Wed 20-Oct-2004 | Comments: 5 | Permalink)
A large part of my job involves travel to clients and resellers in order to perform presentations, training or technical support. It's a considerable drain on time and resources. For example, if I have to give a presentation in London, I'm going to lose ... (continue reading) - Windows 2000 Server Has Pissed Me Off for the Last Time
(Date: Tue 31-Aug-2004 | Comments: 4 | Permalink)
I returned to the office after my week's sojourn in Paris only to find that one of my file-servers had died in my absence. It seems our building suffered a direct hit during an electrical storm and, in accordance with Murphy's Law, I had a single server ... (continue reading)
W3C VALIDATE XHTML
W3C VALIDATE CSS