Solved

Why is my Zywall-2 firewall behind a cable modem with static ip adress failing to connect to internet?

Posted on 2009-05-05
1
347 Views
Last Modified: 2013-12-14
Hello,

As stated in the title, I am unable to connect to the internet through my Zywall 2 Firewall behind a cable modem.

I switched from an ipcop firewall installed on an old computer to the Zywall last saturday. Connection worked fine with static ip with ipcop and also with the ZyWall until monday 5pm.
 The firewall is at a remote office I couldn't reach it remotely via https. I went on site this morning and couldnt log into it from the lan so I reset it to factory defaults and reconfigured it the same way but it fails to connect to anything. Can't ping outside, it doesn't synch with NTP, etc...I checked and re-checked the settings.

Now if I set the WAN connection of the firewall to DHCP, I get an ip adress and the connection works fine. I have contacted the ISP who is telling me everything is ok on their side and that it should also work with the static ip. I also noticed that the wan led on the firewall keeps blinking really fast and never stops even when changing wan settings from static to DHCP. But still it doesn't work with my static ip.

My setup is simple and as following :

Cable Modem

Zywall 2 Firewall
LAN 192.168.1.1 static
WAN 2xx.xxx.xxx.xxx static
SUBNET 255.255.255.192
GATEWAY 2xx.xxx.xxx.xxx
DNS 2xx.xxx.xxx.xxx
DNS2 2xx.xxx.xxx.xxx

Windows 2003 SBS with Exchange server
DNS, DHCP
192.168.1.2 static

Thanks in advance,
gert
0
Comment
Question by:gertdesmet
[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
1 Comment
 

Accepted Solution

by:
gertdesmet earned 0 total points
ID: 24304116
Just got a call back from a technician at the ISP who told me its an issue with their modem cable and zyxell firewalls...... Something about the mac adress not beeing recognized by the zyxel. He did something on their side, I restarted the Firewall and it worked right away.

Sorry for bothering :)

gert
0

Featured Post

Retailers - Is your network secure?

With the prevalence of social media & networking tools, for retailers, reputation is critical. Have you considered the impact your network security could have in your customer's experience? Learn more in our Retail Security Resource Kit Today!

Question has a verified solution.

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

Optimal Xbox 360 connectivity requires "OPEN NAT". If you use Juniper Netscreen or SSG firewall products in a home setting, the following steps will allow you get rid of the dreaded warning screen below and achieve the best online gaming environment…
I found an issue or “bug” in the SonicOS platform (the firmware controlling SonicWALL security appliances) that has to do with renaming Default Service Objects, which then causes a portion of the system to become uncontrollable and unstable. BACK…
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…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

691 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