How to set server's ip address, router, network mask and set if it is an internal or external ip?

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# 1  
Old 11-14-2010
How to set server's ip address, router, network mask and set if it is an internal or external ip?

Hello, I need to write a program which sets server's ip address, router, network mask. Program also should set if it is an internal or external ip. Maybe someone can help me ? Any information from u is very useful Smilie
I stopped at .. Smilie

A=`hostname -i`
echo "server ip address is $A"

any ideas how to write further?
# 2  
Old 11-14-2010
Which OS in which version?

Basically, the server itself doesn't care about "external" or "internal", that type of configuration depends more on the cabling and access restrictions (via firewall and/or VLANs) than on the IP address.
# 3  
Old 11-15-2010
Maybe, I explained not clearly.. I should set the configurations of the server of my Internet provider, I am not sure, but I think that the OS is Linux
# 4  
Old 11-16-2010
I found subnet mask ip, router ip and server ip. The last thing left is to write a script which sets if it is an external or internal ip, maybe someone can tell anything on that? any ideas?
# 5  
Old 11-17-2010
There is a convention for using certain IP address ranges for Intranets and these IP address ranges are not used on the Internet.
There is a reserved range for Class A, B and C Intranets.
Providing that the convention has been followed it is possible to determine whether an IP address is Internal or External.

RFC 1918 - Address Allocation for Private Internets (RFC1918)
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