Solved

Connecting ISP Bridge to CPE Router

Posted on 2015-02-19
  • Routers
  • Networking Hardware-Other
  • Wireless Hardware
  • Hardware Firewalls
  • Network Security
  • +1
3
377 Views
Last Modified: 2016-11-23
Hello. I have an Ethernet over Copper circuit that terminates into an Adtran 838 Bridge. I have to use a Cisco router to connect the circuit into my firewall. My router (Cisco 1841) has two (2) FastEthernet (FE 0/0 & FE 0/1) Interfaces. FE 0/0 is programmed and connected to the CPE WAN IP of the Adtran Bridge. The other Interface (FE 0/1) is programmed to the gateway LAN subnet provided by the ISP, and connected to my firewall. My firewall is a Dell SonicWall NSA3500.

 I am unable to ping the gateway of the LAN subnet provided by the ISP from behind the firewall. I can ping the IP addresses of both FastEthernet interfaces from the router console. From the router console I cannot ping anything on The Internet.

I am not a Cisco expert, but, I would imagine I need the following to happen:

1.  I need the ability to ping the ISP LAN Subnet Gateway IP Address from behind my firewall.
2.  I need the ability to ping anything pingable on The Internet from the router console.

Thanks in advance for any assistance offered.
0
Comment
Question by:QuinnCushing
3 Comments
 
LVL 61

Expert Comment

by:gheist
Comment Utility
Can you ping ISP gateway from router? And a machine on the LAN?
0
 

Accepted Solution

by:
QuinnCushing earned 0 total points
Comment Utility
I could ping from the router to the ISP gateway. I was unable to ping the ISP gateway from the LAN.
I made a change on the firewall, to allow ICMP packets to pass from the LAN to the WAN via NAT translation.
All is working as expected now.
0

Featured Post

Threat Intelligence Starter Resources

Integrating threat intelligence can be challenging, and not all companies are ready. These resources can help you build awareness and prepare for defense.

Join & Write a Comment

This subject  of securing wireless devices conjures up visions of your PC or mobile phone connecting to the Internet through some hotspot at Starbucks. But it is so much more than that. Let’s look at the facts: devices#sthash.eoFY7dic.
This paper addresses the security of Sennheiser DECT Contact Center and Office (CC&O) headsets. It describes the DECT security chain comprised of “Pairing”, “Per Call Authentication” and “Encryption”, which are all part of the standard DECT protocol.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

743 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now