Cisco 5505 ASA Site to Site VPN question

Posted on 2014-10-09
Last Modified: 2014-10-22
Hi All...

I am preparing to configure a Site to Site VPN from our head office to a new remote location in the very near future. I am fretting about how our network is configured and if I'll run into problems.

Our Network it set up more or less as follows:

<-- (LAN) (Linksys RVS4000 set to "Gateway") ---> <--- ASA 5505) ---Outside IP--->

When I set up the VPN, I need our remote location to be able to access the network. Do I need to do any fancy configurations to get the Tunnel to cross the 192.168 network?
Question by:TORLYSIT
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2

Author Comment

ID: 40371594
Adding a simplistic vis. drawing of the network I'm speaking ofNetwork diagram
LVL 10

Expert Comment

by:Schuyler Dorsey
ID: 40375204
I'm sort of confused here...

Are are Linksys gateway and Cisco ASA separated across the internet? (I assume so by your saying a new remote site). But your diagram is confusing to me.

Just curious.. why do you have a Cisco RVS at then going to the ASA at I'm not quite sure what your WAN segment is accomplishing year. I often see a l3 switch or a router with a /30 between itself and the firewall for security reasons but unsure on your setup.

But.. a standard site to site vpn shouldn't be an issue regardless.

Author Comment

ID: 40379891
The ASA and the RVS4000 are at the same site (This was built before I was hired to admin it.)

Instead of creating a Port based DMZ, one of my predecessors installed an RVS4000 in Gateway mode with IP ACLs limiting traffic from the network to the network (All local traffic) sitting behind a Cisco ASA 5505 that terminates at our ISP Router.

I'm currently working on an initiative to find out if I can untangle it without impact but have to set up the new site in a short bit. Hence my question about site to site in our current environment.
Visualize your virtual and backup environments

Create well-organized and polished visualizations of your virtual and backup environments when planning VMware vSphere, Microsoft Hyper-V or Veeam deployments. It helps you to gain better visibility and valuable business insights.

LVL 10

Expert Comment

by:Schuyler Dorsey
ID: 40385290
There shouldn't be an issue setting up the site to site even in the current setup.
LVL 29

Accepted Solution

Alan Huseyin Kayahan earned 500 total points
ID: 40396014
RVS4000 in Gateway mode with IP ACLs limiting traffic from the network to the network

Make sure you put an permit ACE in RVS400 allowing traffic sourced from the local network of Beli networks destined to

Second, make sure that RVS4000 is not doing any type of NAT between and

Finally make sure that the local side of the interesting traffic ACL in ASA is and not

Doublecheck if RSV4000 has either a default route or manual route regarding Beli Networks' local subnet to Also ASA has a route to for

As an advice, in case you need to go for restructuring your network, never use the factory default subnets of many vendors such as or It would cause you headaches if by any chance the remote end of the VPN is using the same subnet.

Author Comment

ID: 40397635
Thank you MrHusky.

The subnets were definitely not my choice as I inherited the whole thing when I started here.

Thanks for all the information!
LVL 29

Expert Comment

by:Alan Huseyin Kayahan
ID: 40398203
You are welcome!

Featured Post

Webinar May 25: Cloud Security Strategies for SMBs

Small and mid-sized businesses are a driving force behind cloud adoption, and it’s no wonder: cloud benefits are BIG.  But for all the convenience that moving to the cloud provides, where does security come into play?

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
Many of the companies I’ve worked with have embraced cloud solutions due to their desire to “get out of the datacenter business.” The ability to achieve better security and availability, and the speed with which they are able to deploy, is far grea…
Here's a very brief overview of the methods PRTG Network Monitor ( offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor ( If you're looking for how to monitor bandwidth using netflow or packet s…

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question