Re: isa on a single subnet

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

I think your solution however is best, to (if I understand you) connect
the cable modem to a hub and the router also connects to the hub and
thus has access to the cable modem.

Yes. That is exactly what I was suggested you.

Then and a cable from the hub goes
into the internal network which goes to all computers as well as the
ISA server.

Oh, my...
Absolutely no! No way!
Your external network should be physically disconnected from the internal network.

I can't find any more words to express myself. Let's do the picture (see attachments).
Now your network look like this: "current_setup.gif".
And I suggest you to do this: "proposed_setup.gif"

Red lines crossing the D-Link router on the proposed setup diagram mean "get rid of this D-Link box after you deploy and thoroughly test the ISA server".

My concern was that this might not be secure because external packets
from the cable modem would be circulating in the internal network, and
some packets might be from hackers and so on.

There is *no* concerns at all with the setup I'm trying to suggest you. All you need to do, is to understand my proposal and deploy the network accordingly.

--
Regards,
Andrew

GIF image

GIF image

Relevant Pages

  • Re: Odd web site behaviour using any browser in FC2 and FC3
    ... > FC system NATs internal network at home to address attached to cable modem. ... > When I use ANY browser from the FC system to go to www.galottery.com, ... the connection is set up WITHOUT the CWR and ECN flags set. ...
    (Fedora)
  • Re: [SLE] how to limit cable modem upload speed?
    ... >>The trouble is that both internal and external traffic go through the ... >>same card. ... Presumably you have an internal network and and external ... There's a wireless router plugged into the cable modem; ...
    (SuSE)
  • Re: New on cable. Bash prompt name changed?
    ... software running on a cable modem. ... modem connect directly to my internal network. ... m0n0wall or pfsense on soekris or wrap, openwrt on a wrt54gs ...
    (Fedora)
  • [SLE] how to limit cable modem upload speed?
    ... I want to limit the speed at which my linux box will upload to the ... cable modem, since, above a certain rate, this slows everything down. ... streaming to the internal network. ... POking around on Google tells me there is a "tc" command, ...
    (SuSE)
  • Re: setting up a home network
    ... Router will handle the WAN, an give you an firewall, plus most has 4 ports ... the hub to Netgear, so I would like to make this work if possible. ... Cable modem, plug in to router, then each computer, to the router, each ... After running MS network setup wizard. ...
    (microsoft.public.windows.mediacenter)