Network security is a hot topic today, and will only increase in importance in the months and years ahead.
Laptop Battery While most of the attention is paid to exterior threats, there are some steps you can take to prevent unwanted Cisco router access from within your organization.
- Your computers are in an internal network behind a NAT based router. Only the router has a public IP address. You can access your internal network computers via the Internet. To do this you need to configure 'Forwarding' firewall. Configure the router to forward connections from a port on the router to a specific IP address and port (Radmin server's default port is 4899) of the target computer in your internal network. You need to assign a port on the router for every computer you need to access. The router will then forward the connection to your computer in the internal network.
- Your PCs have real IP addresses but the firewall has its port 4899 closed. In this case you have to open 4899 or use another open port.
- Radmin Server does not start on the server. Examine the log file on the server for the reason.
Thinkpad Whether you want to limit what certain users can do and run on your routers, or prevent unauthorized users in your company from getting to config mode in the first place, here are four important yet simple steps you can take to do so.
It' - the included Setup Wizard takes you through configuring the Router, step by step. The Router can act as a DHCP server for your network, so your PCs are configured automatically. Play (UPnP) lets specialized Internet applications configure the Router so you don't have to. in NAT technology helps keep intruders out of your computers.
Microsoft
Encrypt the passwords in your running configuration.
It' - the included Setup Wizard takes you through configuring the Router, step by step. The Router can act as a DHCP server for your network, so your PCs are configured automatically. Play (UPnP) lets specialized Internet applications configure the Router so you don't have to. in NAT technology helps keep intruders out of your computers.
Laptop Computers This is a basic Cisco router security command that is often overlooked. It doesn't do you any good to set passwords for your ISDN connection or Telnet connections if anyone who can see your router's running configuration can see the passwords. By default, these passwords are displayed in your running config in clear text.
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Laptop Computer One simple command takes care of that. In global configuration mode, run service password-encryption. This command will encrypt all clear text passwords in your running configuration.
To protect your data and privacy, bit WEP encryption, Fi Protected Access (WPA) wireless security. The Router protects your PC from most known Internet attacks with a powerful Stateful Packet Inspection firewall. It can also serve as a DHCP Server, through, and can be configured to filter internal users' access to the Internet. And even with all this power, based configuration utility.
Desktop Computer Set a console password.
Notebooks If I walked into your network room right now, could I sit down and start configuring your Cisco routers?
Lenovo If so, you need to set a console password. This password is a basic yet important step in limiting router access in your network. Go into line configuration mode with the command "line con 0", and set a password with the password command.
Hard Drive Limit user capabilities with privilege level commands.
Travelstar Not everyone who has access to your routers should be able to do anything they want. With careful use of privilege levels, you can limit the commands given users can run on your routers.
Gateway Privilege levels can be a little clumsy at first, but with practice you'll be tying your routers down as tight as you like. Visit www.cisco.com/univercd for documentation on configuring privilege levels.
Laptop Parts Configure an "enable secret" password.
Software It's not uncommon for me to see a router that has an enable mode password set, but it's in clear text.
Hard Drives By using "enable secret", the enable mode password will automatically be encrypted. Remember, if you have an enable password and enable secret password set on the same router, the enable secret password takes precedence.
Electronics These four basic steps will help prevent unwanted router access from inside your network. If only preventing problems from outside your network was as simple!
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