---- a/src/fw_iptables.c
-+++ b/src/fw_iptables.c
-@@ -449,7 +449,7 @@ iptables_fw_init(void) {
- /* CHAIN_TO_ROUTER, related and established packets ACCEPT */
- rc |= iptables_do_command("-t filter -A " CHAIN_TO_ROUTER " -m state --state RELATED,ESTABLISHED -j ACCEPT");
- /* CHAIN_TO_ROUTER, bogus SYN packets DROP */
-- rc |= iptables_do_command("-t filter -A " CHAIN_TO_ROUTER " -p tcp --tcp-flags SYN SYN --tcp-option \\! 2 -j DROP");
-+ rc |= iptables_do_command("-t filter -A " CHAIN_TO_ROUTER " -p tcp --tcp-flags SYN SYN \\! --tcp-option 2 -j DROP");
-
- /* CHAIN_TO_ROUTER, packets to HTTP listening on gw_port on router ACCEPT */
- rc |= iptables_do_command("-t filter -A " CHAIN_TO_ROUTER " -p tcp --dport %d -j ACCEPT", gw_port);