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jsarinanaFlag for United States of America

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Comcast router

Running a Small Business Server 2012 Essentials with 7 users
We also have several NVA security camera systems. After creating a few passthroughs that would not work properly we would call Comcast support, support would do some changes and the passthroughs would work just fine. I'm not sure what they did to get it to work, I assume they simple allowed certain ports.

A couple months ago I had to add another passthrough but again it would not work. I called support and this time they could not get the passthrough to work properly so they recommended I use my own Router, Comcast support turned the Comcast router into bridging mode and  I installed a Linksys LRT224 and configured all my passthroughts. Everything worked just fine. My new Linksys router would answer to 192.168.1.1
 DHCP on the Linksys router is turned off and my SBS2012 server is doing DHCP and DNS.
Today I'm having network issues, if I go to http://192.168.1.1 the Comcast router comes up and not my Linksys.
I called Comcast support and all they can tell me is that my Comcast router is still in Bridge mode. I removed the Linksys and now my Network is running ok but of course none of my passthroughs are working.

Question if my Comcast router was set to bridge mode wouldn't I lose the internal address 192.168.1.1?

Any suggestions are appricated
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Joshua Hopkins
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Ususally when the comcast modem is set to bridge mode you lose access to the web gui for it.  I would call comcast and have them adjust it.

Alternatively you can change your internal network schema to something other than 192.168.1.x to something else.
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When Comcast changed it to bridge mode I did lose my gui, then I setup my Linksys with schema 192.168.4.1. Now the Comcast router responds to 192.168.4.1
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hypercube
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I don't know what you mean that "the Comcast router responds to 192.168.4.1".
I mean the address 192.168.4.1 gives me the Comcast router gui. 192.168.4.1 used to give me the Linksys router gui that's when everything worked correctly.
Well, that's very interesting.  I wouldn't have thought that the Comcast would have an address like that.
But then, it's not all that "unusual" a subnet or perhaps I should say "imaginatively unusual" as compared to something like 10.123.234.1.

What are the IP addresses on the LAN now?

When you can get into the Linksys, it would be interesting to see the Status page.
It would also be somewhat interesting to know what happens if you hook a laptop or other computer up wired directly to the Comcast device.
There's a bit of a mystery here that needs a bit more illumination.
I found the Comcast router still had a DHCP service running, as soon as I turned it off things started to work properly