Hello: TC1000 1-HiPer NMC 2-HiPerARC 10-Hiper DSP We are a small ISP (400 customers). We have 2-ISDN-PRI lines for our customers to dial in. Our entire system looks like this: / / T1 to External Internet / CISCO 26XX Router | HUB 10/100 | ---------------------------------------------------------------| | | | | | NMC ARC1 ARC2 Web Authentication ----------- 3Com ------------ Server/Email | | | | | | | | | Customer Dial-In Our customers can dial-in, are authenticated and can access the internal web site (www.tibonline.net) and retrieve their email. But when they try to connect to any web site (outside our network) on the external net (such as www.yahoo.com), they time out with a message saying that "this page can't be displayed". Originally I thought that the problem was a DSN problem. However, I have checked & DNS is resolving IP addresses. As a matter of fact, I have no problem, when I connect the internet from my own terminal, which is on LAN. I have reprogrammed 3COM box (ARC1 & ARC2) BUT the problem persists. Following are new the IP address: NMC (Port 17) 12.21.237.240 ARC1(Port 15) 12.21.237.241 IP Pool: 12.21.237.48/31 ARC2(Port 16) 12.21.237.242 IP Pool: 12.21.237.96/31 This problem was first noticed about a month ago. Somehow it disappeared (magic). It is back again. Is it possible that either one of the ARC or DSP card is bad? Kirti