[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

Connecting ISP Bridge to CPE Router

Posted on 2015-02-19
3
Medium Priority
?
464 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
2 Comments
 
LVL 62

Expert Comment

by:gheist
ID: 40656046
Can you ping ISP gateway from router? And a machine on the LAN?
0
 

Accepted Solution

by:
QuinnCushing earned 0 total points
ID: 40690804
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

Managing Security & Risk at the Speed of Business

Gartner Research VP, Neil McDonald & AlgoSec CTO, Prof. Avishai Wool, discuss the business-driven approach to automated security policy management, its benefits and how to align security policy management with business processes to address today's security challenges.

Question has a verified solution.

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

Keystroke loggers have been around for a very long time. While the threat is old, some of the remedies are new!
In this blog we highlight approaches to managed security as a service.  We also look into ConnectWise’s value in aiding MSPs’ security management and indicate why critical alerting is a necessary integration.
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…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…

612 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