Ok, so your acceptor was "unopened". Note that you can use the constructor that creates & opens the acceptor (i.e. puts it into listening mode): http://www.boost.org/doc/libs/1_37_0/doc/html/boost_asio/reference/basic_soc... 2008/11/24 stefys

You were right, my apologies. Apparently, the problem was lying in preparing the acceptor to wait for clients. I was doing .bind() on it, but I was forgetting to do .listen().

Best regards, Steven