Recently, someone or something has been turning off IP forwarding on my CentOS server: -------------------------- [tim@william NumberTheory]$ sudo sysctl net.ipv4.ip_forward net.ipv4.ip_forward = 0 [tim@william NumberTheory]$ sudo sysctl -w net.ipv4.ip_forward=1 net.ipv4.ip_forward = 1 [tim@william NumberTheory]$ sudo sysctl net.ipv4.ip_forward net.ipv4.ip_forward = 1 -------------------------- Who or what can this be?