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Another day another hacked website 23 Jul 2013 | 05:04 pm
Yesterday morning, phone rings to notify my of a new sms. Someone could not access his website on some server that I am root/administer. I tried to ping the server and got 1 reply every 10-15 packets...
Greek PGP Web of Trust 2012 edition 8 Jul 2013 | 10:18 pm
I’ve very glad for hosting this guest post. Dorothea put some real effort into it. So…enjoy! —————————————————————————————————————– In 2008 Patroklos Argyroudis created the first visualization of th...
How Vodafone Greece degrades my Internet experience 30 May 2013 | 01:11 pm
The title may sound a bit pompous, but please read on and you’ll see how certain decisions can cripple, or totally disrupt modern Internet services and communications as these are offered(?) by Vodafo...
Linux kernel handling of IPv6 temporary addresses – CVE-2013-0343 23 Feb 2013 | 07:27 pm
I reported this bug on November 2012 but as of February 2013 it still hasn’t been fixed. My initial report on oss-security and kernel netdev mailing lists reported it as an ‘information disclosure’ p...
mitigating wordpress xmlrpc attack using ossec 4 Jan 2013 | 02:59 am
I’ve created some local rules for ossec to mitigate some of the effects of the wordpress xmlrpc attack presented here: WordPress Pingback Portscanner – Metasploit Module. They seem to work for me, us...
World city map of Tor nodes 27 Nov 2012 | 04:55 am
Some months ago I started playing with the idea of creating a world map that would have every Tor node on it. Obviously I wan’t the first one…I soon discovered Moritz Bartl’s post on the same topic. L...
Scaling a small streaming system from 50 to 4000+ users 20 Nov 2012 | 02:15 pm
This post was originally written on 09/11/2012 but for various reasons it couldn’t be published earlier. It won’t be very technical, it’s mostly a behind the scenes view of how some of us at NOC GRNET...
Review of the first Athens CryptoParty 13 Nov 2012 | 12:23 am
On Sunday the 11th of November we finally had our first CryptoParty in Athens, Greece. We hosted it at the Athens Hackerspace. Organizing We organized our first CryptoParty in a very ad-hoc way. A p...
When in doubt, always blame the application 7 Nov 2012 | 01:36 am
When you have a misbehaving system and you are not sure what the problem is, always bet on a poorly written application. Here’s a small example of how another poorly written web application caused sy...
Περί αναξιοπιστίας του κ. Βαξεβάνη 29 Oct 2012 | 12:08 pm
TL;DR Ο Βαξεβάνης με την δημοσιοποίηση της “λίστας Lagarde” λέει πως ξεμπρόστιασε το σύστημα. Ο εισαγγελέας φαίνεται να θέλει να τον ελέγξει για τις πράξεις του. Δεν θα βρει τίποτα το μεμπτό και όλα ...
