Block traffic from a specific IP or Network

[cesjr]

How could I block traffic from a specific IP or Network .
I using Firewall –-> Rules and add a rule to block this  specific IP on WAN.
the source IP is a specific IP , source port is any , destination port is any ,but the TCP:S from the attacking IP is still working .
anything suggestion is appreciate ,thanks

[doktornotor]

Flush the states or reboot.

[cesjr]

Thanks a lot , after  using "Advanced features" of TCP ,and select all flags ,then I reboot pfsense ,the block rules is working :)