Need much more than 350 established network connections

[Wiese, Hendrik]

Hello,
 
We develop a load simulator which simulates subscribers by establishing
a high number of connections to different VLAN IPs. Now we got a problem
here with Fedora 4, where we can only establish 350 connections from one
IP to another one. But we need to establish much more connections
between two specific IP addresses. SELinux is disabled, so this can't be
the reason. We are rather sure that this is a security limitation, which
isn't required in our systems. Any help breaking this limitation would
be greatly appreciated.
 
Ragards,
H. Wiese