Notice that when i'm not in TPROXY mode ie standaard acces on port 3128. access are logged in access.log and my contents are filtered. this may meen that there is no probleme with squidGuard Config and squid. the problem may be with TPROXY. when configuring Squid-3 source as: ./configure --enable-linux-netfilter In the config log I can see : error: linux/netfilter_ipv4/ip_tproxy.h: No such file or directory Is this normal ? regards.