Date: Fri, 7 Mar 2008 09:32:56 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Siraj Shaikh <siraj.shaikh@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Manually opening TCP ports Message-ID: <20080307153256.GA69157@dan.emsphone.com> In-Reply-To: <3b2ddd940803062347w3fefeb72w519ac28ca73f24d7@mail.gmail.com> References: <3b2ddd940803062347w3fefeb72w519ac28ca73f24d7@mail.gmail.com>
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In the last episode (Mar 07), Siraj Shaikh said: > I am just wondering if there is a utility (or any feature in FreeBSD) > that allows me to manually open a TCP port on a machine. I am looking > for a way that could either allow me to open ALL or many TCP ports on > a machine. > > Also, is there any way of running a service on more than a single > port, or on all or many ports? If you are concerned about managing 65000 listening sockets ports in a single process, you can write a single ipfw rule to collapse many incoming ports into a single one, so you only have to open one listening socket in your program: ipfw add 1300 fwd 127.0.0.1,7000 tcp from any to me dst-port 7000-8000 The correct answer to your question really depends on why you need to open so many ports in the first place. -- Dan Nelson dnelson@allantgroup.com
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