that's a high level overview of network security...and it really sounds like that might be what you need - in the long run.
in the short term, we need more information from you to recommend specifics. is your problem on a router or firewall? model? IOS version? OS version? etc. what are you trying to prevent, or what would you like to prevent. we need specifics.
And I'm using NAT becuase we are using a regular 3.5G router modem, so we need a NAT.
one of my subnetworks requires to access internet, and single computer in another subnetwork.
The people in that computer's subnetwork figured out that he can access internet, so they change thier IPs.
I tried to prevent changing the IPs by taking the administrative rights from them. But now, they are using another computers, they are using thier personal laptops, they simply plug the network cable that connects thier company's desktop computers.
I'm so angry of this behavier, do you agree with me?
If yes, please help me to prevent it.
I think that I have to do some encryption on router and install the encryption key on the Windows XP or Vista.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...