Home > Ask the Networking Experts > Routing and switching with Sudhanshu Gupta Questions & Answers > How do I connect my VLANs to the Internet using NAT and the appropriately configured ACL?
Ask The Networking Expert: Questions & Answers
EMAIL THIS

How do I connect my VLANs to the Internet using NAT and the appropriately configured ACL?

Sudhanshu Gupta EXPERT RESPONSE FROM: Sudhanshu Gupta

Pose a Question
Other Networking Categories
Meet all Networking Experts
Become an Expert for this site


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us   


>
QUESTION POSED ON: 04 May 2007

I have been using private addressing on my VLANS. Now I need to have them connect to the Internet over the router with sub-interfaces already defined. I know that I need NAT, and I know I need to configure the appropriate ACL, but I don't know how. I have tried several ACL combinations but to no success.

From your reply to some other question close to this, you said static route entries have to be provided with the Internet interface IP specified as outgoing address. But I already have all the interfaces as static (directly connected) routes. I'm confused.


>
EXPERT RESPONSE

Hi Ted,

For all your IPs which are inside your network you can use dynamic NAT, but if you have some servers that need to be accessed from outside, they need to carry a static NAT.

The statement you have mentioned talks about creating a static route pointing towards outside a network so that traffic can go outside. This statement is not related to NAT.

Hope this clarifies.


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us   


RELATED CONTENT
Routing and switching with Sudhanshu Gupta
What does a subnet do?
How to set up a VLAN on multiple switches
Can a Layer 3 switch replace a router for WAN connections?
How can I implement MAC address binding between switches?
How can I use a Layer 3 switch for voice routing?
How to upgrade an Input/Output Supervisor (IOS) router
Inter-VLAN routing with a LAN and WAN on a single router
What do routers use MAC addresses for?
Does each routing protocol have a different routing table?
How can I load balance between DSLs and LLs?

VPN Design
What's the difference between VPN pass-through and multi-tunneling?
How does IPv6 subnetting work in LAN and VLAN network design?
Direct transport VPN configuration
Network-to-network VPN gateway configuration for Cisco EzVPN
Full-crypto VPN hardware client configuration for Cisco EzVPN
Split-tunnel VPN hardware client configuration for Cisco EzVPN
Cisco Virtual Office gives remote workers simple and secure access
Split-tunnel Cisco IPsec VPN gateway with software client
Full-crypto Cisco IPsec VPN gateway with software client
IPsec VPN router configuration: The ISAKMP policy
VPN Design Research

Network Routing Protocols
How to set up a VLAN on multiple switches
What makes a WAN different from a LAN and MAN?
Does each routing protocol have a different routing table?
How can I load balance between DSLs and LLs?
How to configure ISDN and backup leases on routers
Types of link-state advertisements (LSAs) used in Open Shortest Path First (OSPF)
How do I configure two leased lines in one router?
Why IPv4 and IPv6 don't do fragment reassembly in routers
What is the difference between a GRE tunnel and IPsec tunnel?
How can I check connectivity and ping between sites?
Network Routing Protocols Research

RELATED GLOSSARY TERMS
Terms from Whatis.com − the technology online dictionary
extranet  (SearchNetworking.com)
Layer Two Tunneling Protocol  (SearchNetworking.com)
virtual private LAN service  (SearchNetworking.com)

RELATED RESOURCES
2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems
Search Bitpipe.com for the latest white papers and business webcasts
Whatis.com, the online computer dictionary



Search and Browse the Expert Answer Center
Search and browse more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.
Browse our Expert Advice



Expert networking advice and tips for IT professionals
HomeNewsTopicsITKnowledge ExchangeTipsAsk the ExpertsMultimediaWhite PapersNetworking Product Trials
About Us  |  Contact Us  |  For Advertisers  |  For Business Partners  |  Site Index  |  RSS
SEARCH 
TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines.

TechTarget Corporate Web Site  |  Media Kits  |  Reprints  |  Site Map




All Rights Reserved, Copyright 2000 - 2008, TechTarget | Read our Privacy Policy 		  TechTarget - The IT Media ROI Experts