I apologize for my confuse exposition. My server has a static, well known IP. The problem is that I don't know the IP of my customers (client side) and then I cannot insert those addresses in pg_hba.conf file. The question il: Is there a method to avoid to insert the addesses of the clients in the pg_hba.conf and to allow connections from internet with security assured only by username and password? The unique (mandatory) solution to solve this problem id to use web services (and then port 80) or there are some other solutions? Thank you Domenico No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.21.3/1307 - Release Date: 02/03/2008 15:59 ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to majordomo@xxxxxxxxxxxxxx so that your message can get through to the mailing list cleanly