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PHP – decoding ‘gzinflate(str_rot13(base64_decode’ hack attempts

Monday, April 9th, 2012

A recent ‘alarm’ about RFI (remote file inclusion)  ‘attacks’ against PHP coded web sites (i.e. any WordPress site) got me curious about some of my log messages.  In this case the web server/PHP application were not compromised due to a somewhat guarded server configuration.  The configuration also ‘captured’ the triple-encoded attack code (some excerpts below.) Continue reading →

mod_rails AKA mod_rack AKA mod_passenger AKA mod…

Friday, January 27th, 2012

mod_rails AKA mod_rack AKA mod_passenger AKA mod_works_some_times Mixing:  Apache 2.x, Ruby on Rails 3.x, Passenger 3.0.9, Fedora Linux (FC 13.) As always the problems that you encounter may be self-inflicted – in this case I had to ‘turn off’ anything that I thought that I knew about configuring Apache…   The mod_passenger documentation provides many examples  Continue reading →

Installing Rails 3.1 – sample_app_3_1

Friday, December 2nd, 2011

Rails 3 Sample Application This is simply one of those problems you may not see – especially if you have some sort of ‘standard OS build’ for a development server. >> gem list rails *** LOCAL GEMS *** rails (3.0.1, 3.0.0) >> which rails /usr/local/rvm/gems/ruby-1.9.2-p290@rails3tutorial/bin/rails >> gem install rails –version 3.1.0 Fetching: multi_json-1.0.3.gem (100%) Fetching: Continue reading →

Linux GeoIP Firewall via iptables (using ipset)

Saturday, September 24th, 2011

In a previous post using GeoIP data with xtables-addons was discussed. CAVEAT – GeoIP data changes constantly – if you implement such a solution then make sure that you also add some sort of auto-data-update process.  Also, GeoIP filtering does not provide any guarantee that a system from ‘filtered IP space’ cannot access your resource Continue reading →

Long 1-Wire (MicroLan) networks

Thursday, July 21st, 2011

Long is, of course, relative…  After much tinkering/testing with Arduino and 1-Wire networks I discovered what seem to be some limitations: using an Arduino Uno I reached a maximum of 54 sensors on a large bread board – add sensor #55 and the network stops working when using parasite power on my ‘real lan’, during Continue reading →

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