Solved

Firewall blocking vpn traffic

Posted on 2012-04-02
3
409 Views
Last Modified: 2012-07-13
Hi

We have an intercampus VPN managed by a new company and we are in the process of migrating the current system to the new one.

My current system used an ipsec vpn between campuses and is a clearOS (centos) system. We had a server running the clearOS OS at every campus and then used the built in ipsec vpn to connect them.

The new system is managed by a 3rd party with cisco routers. Basically all campuses connect to the same network with the cisco routers and there is a single breakout point at the 3rd party offices to the outside.

My servers seems to be blocking the VPN traffic. If I switch off the firewall everything is fine but if it is one I can only connect to the actual servers and no other PC's on the campus LAN. They do provide a firewall so this question is more about me being curious than critical. My servers are to become file servers only so the firewall is not a big issue but if possible I would like to have the option.

Here is the setup:
Network layout
A traceroute from within campus 01 shows the problem to be the eth0 NIC on the server. Everything stops at 10.70.21.2. I can ping and access samba on 192.168.0.1 (the server) but not on other PC's in that network. I specifically need to get to 192.168.0.254.

As I said before when I switch off the firewall at campus 02 I can access everything and the VPN is fine.
0
Comment
Question by:QuintusSmit
[X]
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
  • 2
3 Comments
 
LVL 5

Accepted Solution

by:
andrew1812 earned 400 total points
ID: 37799421
What is the default gateway configured on the PC's on the 192.168.1.0 network. It should be the IP 192.168.0.1.

Also try this test.

Install wireshark on any of the PC's in the 192.168.1.0 network. (Ex: PC with IP 192.168.1.2)

ping 192.168.1.2 from campus 1

In th wireshark capture check if you are able to receive the ping request triggerred from campus 1 and if a response is being sent out. If a response is not being sent out, then it would be the gateway issue.
0
 
LVL 1

Author Comment

by:QuintusSmit
ID: 37799447
ok- will do that and report back. I can only do it at night when everyone has gone home so wil try it tonight.
0
 
LVL 1

Author Closing Comment

by:QuintusSmit
ID: 38183253
Suggestion of using wireshark was a good one. In the end though the problem was on the side of the service provide. This is bit technical for me but turns out the package sizes used by clearOS was not compatible with their system which caused things to go in a loop on their side
0

Featured Post

What Is Transaction Monitoring and who needs it?

Synthetic Transaction Monitoring that you need for the day to day, which ensures your business website keeps running optimally, and that there is no downtime to impact your customer experience.

Question has a verified solution.

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

I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
This article offers some helpful and general tips for safe browsing and online shopping. It offers simple and manageable procedures that help to ensure the safety of one's personal information and the security of any devices.
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

726 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