Cannot access certain websites...
Posted on 2004-11-17
Ok, I have read and read and read and researched and not found a damn thing!!! I am sure it is something simple but anyways, here's the problem.
I cannot seem to get to yahoo.com, romeoville.org and a few other selected sites. I just chalked it up to the sites bouncing, but have dropped that theory since I can remote to my home computer and get on the sites with no problem. I can go into my firewall here at work and ping each site without a problem, I can go into the INTERNET router and ping the sites with no problems. I can ping the sites from the Web Filter as well with no problems. The problem lies within trying to ping/traceroute from our internal core router. I get a "Destination unreachable" back from the router. Nothing has changed in either router to make this happen. I have checked, double checked and triple checked DNS and Name-Servers. I have cleared the ARP Cache and the DNS Cache on our routers and DNS servers. I have cleared Temp Internet files, Cookies and even gone as far and building a machine from scratch to test this theory. Somewhere between the firewall and the outside internet router, something is lost in translation......here is an example of the network.....
INTERNET ROUTER (outside of firewall) xxx.xxx.xxx.xxx
Sonicwall Pro Firewall Wan port xxx.xxx.xxx.xxx Lan port 192.168.1.3
Network Core Router (LAN Port of firewall) 192.168.1.1
This network has been in place and functioning for quite sometime and now these certain sites aren't accessible. I have also run repeated tests for spyware/adware/malware/viruses and checked the hosts files for redirects. Please let me know what information I can provide to someone to help me resolve this issue. I have contacted the ISP as well and they report no trouble, which is proven through the traceroutes and pings from the internet router. I can only assume that it's a routing issue with the core router or the firewall.