Eric Kung
asked on
NAT configuration on cisco 1941
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 63.100.100.1 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.
GuruChiu
You do mean 555-5560, not 5550-5560? The way Cisco implement port forwarding, you have to list the ports one by one. I do not aware a way to port forward a range. That means to forward port 555-5560 you need thousands of line. Pls confirm you indeed want 555 not 5550.
So, based on the ports, I am presuming you're trying to make a Tandberg Classic Video Conferencing system available on the Internet to outside companies trying to make video calls to your company. (notes from http://www.vsgi.com/support/technical_faq.php)
So the following ports need to be opened in both directions:
TCP 1720
TCP 5555-5560
UDP 2326-2365
What version of the IOS are you running on the 1941? We can crank out a configuration with explanations for you fairly quickly.
So the following ports need to be opened in both directions:
TCP 1720
TCP 5555-5560
UDP 2326-2365
What version of the IOS are you running on the 1941? We can crank out a configuration with explanations for you fairly quickly.
please show the whole config
ASKER
Yes, we are trying to make a tanberg VC system available on the internet. I know how to open signal ports, but how can I open a range of ports?
TCP 1720
TCP 5555-5560
UDP 2326-2365
How can I find out my IOS? Thank you.
TCP 1720
TCP 5555-5560
UDP 2326-2365
How can I find out my IOS? Thank you.
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