PayPal is not the only organization that blocks Tor.

Jonathan Lassoff jof at
Mon Aug 23 22:21:46 UTC 2010

On Mon, Aug 23, 2010 at 1:18 PM, Matthew <pumpkin at> wrote:
> It is also worth noting that Craigslist prevents the use of Tor albeit in a
> very strange way.
> If you try to post using Tor the ad will be permitted at first and people
> can contact you.  However, after about 15 minutes (and it is always about 15
> minutes) the post is "flagged" and disappears.  This happens even if the
> exit node is in the same location as the section where you are trying to
> place the ad e.g. using a Californian exit server and the ad is something to
> do with California.
> I can understand that every day or week the Craigslist system has a look at
> the Tor exit nodes directory and therefore can identify Tor nodes.
> What I fail to understand is why the Craigslist policy is to permit the
> posting then "flag" it after 15 minutes or so?  Is this automatic?  Is it
> human?  I find it bizarre.  What might be the reasons?

That's interesting. I haven't tried this myself, but I would imagine
it may have to do with the way that craigslist generates their pages.
I could be very wrong, but I think that they're regularly generating
static pages to be served rather than making them dynamically.

For example, if you're searching for a popular term or watching a
popular category, the page for a search only seems to get updated
every 15 - 20 mins at which point several new entries will show up.

Maybe posts created from tor exit nodes are flagged in this automatic
page regeneration?

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