I am new in cisco, and I have one question about NAT. I have a 1941 router. I need to do port forwarding for TCP 2326-2365 and TCP/UDP 555-5560 from outside 126.96.36.199 to one of our internal server (IP 192.168.0.1). Please help me step by step how to do this. Also is it safe to open TCP/UDP 555-5560? It seems some Trojan are usng those ports. Thank you in advance.