We help IT Professionals succeed at work.
Get Started

Win 2008 server lost access to network router

193 Views
Last Modified: 2016-08-03
Have a Win2008 server in a small LAN. It is running as a domain controller and is also running an email server. LAN is connected to Internet via a ZyWALL router (192.168.1.1), and it has worked well for a long time. Yesterday I noticed that the server seemed to not access the Internet anymore (mail server failed dns lookups to external dns). Inbound emails work fine (the server responds to external requests).

Investigation showed that the server doesn't "see" the router.
I'm able to ping the router from other devices in the LAN. From the server I'm able to ping all other addresses - except the router address. From PCs in the LAN I'm able to ping the server's IP address. This tells me that there may be something that prevent the server to access the router. Have checked the routing tables, and the address 0.0.0.0 is routed to the correct address (192.168.1.1).

Expect that there may be some process or service that prevents the server from accessing the rouer's IP addres, but I'm not able to fine what it is. The server is running Malwarebytes to prevent attacks and malware. Have tried to disable it, but not sure if I've done it right.

Are there any other steps to take in order to solve this problems?  Thanks!
Comment
Watch Question
Technology and Business Process Advisor
CERTIFIED EXPERT
Most Valuable Expert 2013
Commented:
This problem has been solved!
Unlock 2 Answers and 5 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE