My company is setting up a TCP/IP network and we've come the point of
deciding on whether we should try to use registered class C addresses or
unregistered class A addresses.
Background:
We will probably have very few hosts which need Internet access, the switch
to TCP/IP is mostly for internal use. Those hosts would probably need
access only for Web browsing and maybe FTP.
When we connect to the Internet it will definitely be through a proxy
server or firewall machine not directly from any host.
We applied for registered IP network numbers and got 16 class C numbers.
The problem is that due to the physical layout of our company we run
into several problems with the max of 254 hosts per subnet.
If we use unregistered class A addresses than almost all the problems go
away and we can even assign some meaning to the addresses. I'm assuming
that we would gain our Internet access through a proxy server or perhaps
a network address translation server so the class A addresses wouldn't be
a problem on the Internet.
The questions I have (finally) are:
1) If we use unregistered class A addresses internally what Internet
services will we have a problem using? i.e. what can't we do through
a proxy server or network address translation server?
2) In your opinion, do you think we will we be painting ourselves into a
corner if we go with unregistered class A addresses? Do you think
this may become a liability for us in the future in that, there may
be a new service available on the Internet which will not work
through a proxy server or firewall and will require registered IP
addresses on our side?
TIA, Brad McCarty
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