Re: cable modem and ISA 2004
- From: Duncan McC <hard@xxxxxxx>
- Date: Tue, 5 Aug 2008 23:06:45 +1200
In article <E7018298-29F3-404C-A795-86FD707B3E31@xxxxxxxxxxxxx>,
bgreg@xxxxxxxxxxxxxxxxxxxxxxxxx says...
Recently switched from Verizon DSL to cable modem provided by Cablevision in
NJ. With DSL I had external NIC set to 192.168.1.3 and connected patch cable
to DSL modem/router at 192.168.1.1. Inside nic to 172.25.10.3. Worked well
for years. With cable config using cable modem Motorola SBV5222 a router must
be used. Purchased Linksys BESFR41. From ethernet port of cable modem I
connect to ethernet port of Linksys router. IP address of cable modem is
192.168.100.1 so I configured ethernet port of Linksys to 192.168.100.5 and
external nic to 192.168.100.3, 255.255.255.0 with gateway
192.168.100.5(Linksys)I logged in to linksys and get external address and DNS
listed as 167.206.245.129 & .130. Have rerun CEICW mutiple times using DNS
addresses listed by Linksys. I cannot get out to internet at server or any
workstations on LAN. If I connect LAN card directly to cable modem and allow
DHCP at LAN card, I can connect. Same occurs at at workstation. I 've
observed logging at ISA 2004 and connection is opened and closed at port 53.
It seems that it is being blocked. Anyone had similar problems with Cable
modem /cable ISP blocking specific ports. Ports are listed open (stealth
mode) via GRC's Shields up. Anyone experienced similar issues?
Yes. But first... you don't need a router on the cable modem.
My config is thus:
cable modem, into server
out (of server), into router, to wk.stations
I think your problem is *really* simple. REBOOT THE SERVER (and it will
pickup the MAC address from the cable modem, and just work.
I beat my brains out about this. :) You can't just plug in a cable
modem to a working server and see it work - you need to reboot the
computer. (I might be wrong, BTW about "picking up" a MAC addy, it
might be that the cable modem gets the MAC set from the computer
(server) - but regardless - I think you'll find that's yer problem,
reboot the server (*after* the cable modem is plugged in, connected,
etc).
--
Duncan
.
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