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New traffic record for GRNET NOC streaming service
Around a year ago I wrote a blog post about how me and @zmousm scaled our streaming infrastructure at GRNET NOC so that we could cope with a sudden demand on the streaming service that we provide to...
View ArticleAnonymize headers in postfix
E-mail headers usually leak some information about the person sending the email. Most servers reveal the sender’s originating IP, but sometimes we might not want this behavior. Here’s a simple way to...
View ArticleCreating a new GPG key with subkeys
A few weeks ago I created my new GPG/PGP key with subkeys and a few people asked me why and how. The rationale for creating separate subkeys for signing and encryption is written very nicely in the...
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Ασφαλιστικά μέτρα ΑΕΠΙ κατά παρόχων, 2013 edition
Πριν λίγες μέρες έγινε πάρα πολύ σημαντική δίκη για το Ελληνικό Internet. Δυστυχώς όμως δεν έγινε καμία αναφορά από τους δημοσιογράφους που ασχολούνται με τα “νέα μέσα” για το θέμα, οι μόνοι οι οποίοι...
View ArticleSMTP over Hidden Services with postfix
More and more privacy experts are nowdays calling people to move away from the email service provider giants (gmail, yahoo!, microsoft, etc) and are urging people to set up their own email services, to...
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Anonymous edits in Hellenic Wikipedia from Hellenic Parliament IPs
Inspired from another project called “Anonymous Wikipedia edits from the Norwegian parliament and government offices” I decided to create something similar for the Hellenic Parliament. I downloaded the...
View ArticleΚατάργηση ηλεκτρονικών ψηφοφοριών και ψηφιακός αναλφαβητισμός
Στις 08/05/2015 στην βουλή σχολιάστηκαν οι ηλεκτρονικές ψηφοφορίες των πρυτανικών συμβουλίων και ουσιαστικά ο Πρωθυπουργός κ. Τσίπρας υπερασπίστηκε την κατάργησή τους. Το κύριο πρόβλημα (μου) με το...
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Ασφαλιστικά μέτρα ΑΕΠΙ κατά παρόχων 2015
Έχει αρχίσει να καταντάει βαρετό ίσως αλλά η ΑΕΠΙ αποφάσισε να μας απασχολήσει και φέτος. Συγκεκριμένα καταθέτει νέα ασφαλιστικά μέτρα κατά των παρόχων: Vodafone Forthnet HOL Wind Cyta OTE OnTelecoms...
View Articlekeys.void.gr – A GPG Keyserver in Greece
After some months of entertaining the idea of setting up a public gpg keyserver I finally managed to find some time and do it this weekend. Habemus keys.void.gr Keyserver! Some history The first time I...
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επισκόπηση της λογοκρισίας στο Ελληνικό Internet
Οι περισσότεροι χρήστες του Ελληνικού Internet αν ρωτηθούν για το κατά πόσο υπάρχει, κρατική ή μη, λογοκρισία σήμερα μάλλον θα απαντήσουν αρνητικά. Η λογοκρισία τη σύγχρονη εποχή δυστυχώς είναι πολύ...
View ArticleThe sorry state of STARTTLS support of Greek email providers
I started looking into the STARTTLS support of Greek email providers completely by accident when one email of mine wasn’t being delivered for some reason to a friend who has an email address at a...
View ArticleUpdate on the state of STARTTLS support of Greek email providers
2 months ago I wrote a blog post describing the really bad state of STARTTLS support of Greek email providers. Things have slightly gotten better since then. Updates on STARTTLS support per provider...
View ArticleFirejail with Tor HOWTO
A few years ago I created a set of scripts to start applications inside a linux namespace and automatically “Tor-ify” their network traffic. The main reason behind this effort was to provide some...
View ArticleTormap – World map of Tor nodes – 5 years later
5 years ago I forked Moritz’s tormap project, updated it a bit and wrote about it. Tormap kept running for years until some changes in googlemaps broke it, not all KMLs were loading as they should. I...
View ArticleLinux network troubleshooting a la Dr. House
Intro The following story is inspired by a recent case I had to troubleshoot at work. I think it is a nice example of troubleshooting Linux networking issues, so I’ve modified/simplified the setup a...
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