Hi list, I have a Linux 2.4.19 box doing NAT, PPPoE, Traffic Shapping and Firewalling. It is a 2xPIII 733MHz with 512Mb RAM. Everything was working just fine until 5 or 6 days ago we started having some strange behavior. Under moderate traffic, 15 to 20 NAT users, we find that traffic suddenly stops for 10 or 15 seconds and then comes back. During this periods I've figured out that if I ping my interfaces or Internet addresses I get: sendto: No buffer space available ping: sent 64 octets to xxx.xxx.xxx.xxx, ret=-1 I've made lots of searchs in mailling lists, Internet and in the kernel source but couldn't work on it. Can you guys help me to solve this problem? tks in advance for your help and attention. Andre andre.correa@pobox.com