Monitoring Tor .onion Websites (uptime alerts)

Uptime Monitoring of Tor .onion Websites

This article will present a few simple website availability monitoring solutions for tor onion services.

Problem

So you've just setup an Onion Service for your website, but how often do you actually check that it's working? Maybe it's a .onion alias to an existing website, and you usually only check it on the clearnet. What's to prevent the darknet presence of your website from going down for weeks without you noticing?

Indeed, it's important to monitor your .onion websites so that you can discover and fix issues before your customers do. But how? Most of the popular uptime monitoring solutions (pingdom, freshping, statuscake, etc) certainly can't monitor .onion websites.

This guide will enumerate some solutions for monitoring .onion websites, so you get an email alert if your site goes down.


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Tor->VPN in TAILS to bypass tor-blocking

This post will describe how to route outgoing traffic in a python script running on TAILS first through Tor, then through a SOCKS proxy created with an ssh tunnel. This is helpful when you want to use the anonymizing capabilities of tor, but you need to access a website that explicitly blocks tor exit nodes (common with sites running CloudFlare on default settings).


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pycurl through Tor without leaking DNS lookups

This article describes the correct way to use pycurl over Tor, such that both DNS lookup data and HTTP(S) traffic is sent through Tor's SOCKS5 proxy.

If you google "pycurl tor", one of the first results is a stackoverflow post that describes how to configure pycurl using the pycurl.PROXYTYPE_SOCKS5 setting. Indeed, even the tutorial To Russia With Love on the Tor Project's Official Website describes how to pass pycurl through Tor using the pycurl.PROXYTYPE_SOCKS5 setting.

However, using pycurl.PROXYTYPE_SOCKS5 will leak DNS queries associated with your HTTP requests outside of the Tor network! Instead you should use pycurl.PROXYTYPE_SOCKS5_HOSTNAME.

The --socks5-hostname argument was added to libcurl v7.26.0. The pycurl.PROXYTYPE_SOCKS5_HOSTNAME argument wasn't added to pycurl until pycurl v7.19.5.1, which (at the time of writing) was less than 2 months ago!

This article will describe how to install pycurl v7.19.5.1 onto the latest version of TAILS at the time of writing, which is TAILS v1.2.3.


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