tcpd vs. firewall

Hi, at home I use a modem connection to my provider and up to now have tcpd installed to do basic access restrictions. So my /etc/hosts.deny forbids in principle everything to the outside world. Is it really necessary to use instead a firewall for such dial-up connections? Which arguments could you find from Security point of view??? Actually I'd prefer to stick with this simple solution, but maybe someone has convincing arguments against this approach... Regards, Marko -- O _ O 0 0 ------------------m-\o/-m------------------------------------------ Dr. Marko K"aning Tel/Fax: +49-3834 554 442 / -3834 554 301 INP Greifswald email : kaening@inp-greifswald.de