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Sometimes you can use unnumbered Serial interface. How big is a block of public addresses for your new location?
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Sometimes you can use unnumbered Serial interface. How big is a block of public addresses for your new location?

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This is Cisco NAT FAQ<br />
<a href="http://www.cisco.com/en/US/tech/tk648/tk361/technologies_q_and_a_item09186a00800e523b.shtml" rel="ugc">http://www.cisco.com/en/US/tech/tk648/tk361/technologies_q_and_a_item09186a00800e523b.shtml</a>
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This is Cisco NAT FAQ
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_q_and_a_item09186a00800e523b.shtml [http://www.cisco.com/en/US/tech/tk648/tk361/technologies_q_and_a_item09186a00800e523b.shtml]

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My company will be moving. I have a Cisco 2821 just handling the T1 then a watchguard X1250 behind it. Before the move, our ISP gave us a block of public IPs, then a block of LAN public IPs. The LAN public IPs were obviously for the Ethernet port on the router to go to the Watchguard WAN port. Now the new ISP just gave one block of public IPs, so I'm assuming I have to NAT on the router to get to the Watchguard. What commands do I have to issue in order to do this? The ports that i need to be able to get to on the Watchguard to administer it from the outside are 4103, 4105, 4117, 4118. Thanks for the help!<br />
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My company will be moving. I have a Cisco 2821 just handling the T1 then a watchguard X1250 behind it. Before the move, our ISP gave us a block of public IPs, then a block of LAN public IPs. The LAN public IPs were obviously for the Ethernet port on the router to go to the Watchguard WAN port. Now the new ISP just gave one block of public IPs, so I'm assuming I have to NAT on the router to get to the Watchguard. What commands do I have to issue in order to do this? The ports that i need to be able to get to on the Watchguard to administer it from the outside are 4103, 4105, 4117, 4118. Thanks for the help!



setting up nat on a cisco 2821

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.