Internet connection drops randomly using NAT/Basic Firewall

Discussion in 'Server Networking' started by Pierre-Charles Mignault, May 6, 2004.

  1. Hi,

    First off I'll explain my network configuration of our
    small office:

    2 servers:
    - provides DHCP, DC, AD and DNS
    - provides NAT/Basic Firewall (2 nics) and VPN

    All DHCP


    As I installed NAT/Basic Firewall in RRAS everything seemed
    to be working perfectly for about 3 or 4 days. One morning
    I came to work realising that our Internet connection had
    dropped. I went over the NAT server to find out that I
    couldn't access the web from that server either. The first
    thing I tried to do is to release and renew the connection
    on the nic connected to my cable modem. Couldn't contact
    the DHCP server of my ISP so my new IP was something like
    192.X.X.X which should have been 24.X.X.X in normal

    After that I contacted my ISP. From his side he was able
    to communicate to the modem perfectly and explained that
    the problem was on my side. I hung up and tried to resolve
    the problem myself... I unpluggued and pluggued the power
    cord of the modem. Cleared the ARP cache and released and
    renewed the connection from the command prompt. It finally
    came back to life for another day...

    Now I have to do these steps everyday so I can get the
    Internet to work on our LAN...

    Can someone please help me resolve this problem???


    Pierre-Charles Mignault, May 6, 2004
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