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Topic:
How to use block of 5 static IPs from Comcast
This thread has 30 replies. Displaying posts 16 through 30.
Post 16 made on Thursday January 16, 2014 at 10:11
alihashemi
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So to let you know how I've seen it work:

ISP comes out, install's two separate modems, each modem is given a static IP. Each person connects to their modem and configures their router for static IP given by ISP. Simple as that. If ISP isn't putting in two separate modems, they'll put in something that can separate the IP's. You just plug from the ISP device into your WAN port, then configure router to the ISP provided static IP info.
Ali Hashemi
Post 17 made on Thursday January 16, 2014 at 10:21
lippavisual
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On January 16, 2014 at 08:18, Mario said...
Yes, CG3000DCR is what's provided and it has 4 ports.
So the IPs doesn't have to be assigned to specific port? 
So if Comcast give me 100.0.0.50 thru 100.0.0.54 then I just tell my 750 that the WAN is one (ie 100.0.0.51) and I'm off to the races?
In that case there won't be any issues with double NAT and the usual double router mess?
Will CG3000DCR have to do any port forwarding or routing?

I'm sure this will be all clear to me in 4 hours when I'm onsite but the cell coverage in the building is non existent so if I need to call Comcast tech support, it will be challenging to ask them questions and verity their idea of solution.
 

I've personally never ran into that Netgear unit before, so I couldn't tell you if ports need to be assigned or not, sorry. But with most modems it's not necessary, they are typically setup for DHCP.

Setup your 750 with one of the provided static IP's as your WAN port address.

You shouldn't be running into any double NAT issues since you only have a gateway/modem and your/his routers. I don't believe that Netgear unit is a router as well.
Post 18 made on Thursday January 16, 2014 at 11:24
CreativeHT
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On January 16, 2014 at 10:11, alihashemi said...
So to let you know how I've seen it work:

ISP comes out, install's two separate modems, each modem is given a static IP. Each person connects to their modem and configures their router for static IP given by ISP. Simple as that. If ISP isn't putting in two separate modems, they'll put in something that can separate the IP's. You just plug from the ISP device into your WAN port, then configure router to the ISP provided static IP info.

Modems arent assigned IPs, yor router is assigned a dhcp or static IP from the isp network. You can have one modem and have one or a hundred IPs from the isp. With the shortage of public IPs, most providers want to see only one IP used per account unless your paying for more. I worked on a business a few years ago with Shaw internet and they had Motorola modem connected direct to switch and every computer in the office was pulling a public dhcp IP. Im sure Shaw would have had a fit if they knew one customer was using 40+ IPs.
Post 19 made on Thursday January 16, 2014 at 15:27
fcwilt
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If you check the specs on the Netgear device you will see that it has a Coax F connector for the single WAN port.

I cannot find a manual anywhere. If someone can find a PDF version I will be glad to read it.

The Netgear site describes this unit as a "Commercial Cable Router" so hopefully it has the required features to allow the IT guy to configure this device to route one of static IP addresses to one of the LAN ports and the other static IP to another of the LAN ports.

But it might not - the LAN ports may simply be part of a dumb switch. Without the manual I cannot be sure - I'm simply making an educated guess based on other gear I have used.

If this device was to be placed in "bridge mode" (assuming that is possible) then you would need another router to provide the routing/firewall/etc functions it currently provides.



 
Regards, Frederick C. Wilt
Post 20 made on Friday January 17, 2014 at 02:35
Ernie Gilman
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In this mess, is the IT guy using some of the wires that you ran for the network, or in any way making you run additional wires, or not provide services you quoted and wired for, because he has to have his network separate? If so, I'd put it on him to work out how to do his exceptional limited super-fazzap network thingie, as everything was clear and properly cost-estimated until he made his demands.

I'd go so far as to tell him the guaranteed way for him to be totally separate is to supply his own connection to the ISP. Two ISP feeds, two modems, etc; voila, two separate networks. This is not technically necessary but proposing that he should provide exceptional wiring for his exceptional needs, and him working out the guarantee that your network does not "connect" to his, does not seem unreasonable as, basically, his requirements are causing the problems.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
OP | Post 21 made on Friday January 17, 2014 at 03:22
Mario
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A bit of followup.
Comcast issued the 5 IPs. 
Comcast placed the unit in bridge mode by disabling DHCP, firewall, and few other things.

By the time I got onsite, the IT guy was able to grab first of the static IPs, put the DNS settings into his firewall and he was done.

Me, not so much :-(
I have never had to do that with 750 so I struggled.
750 is so powerful that it makes it a challenge for new things. 
Without Internet access onsite I had hard time trying to figure out on my cellphone how to get things going.
The IT guy even tried to help but he's unfamiliar with Mikrotik.
Frustrated, I left and I'm still doing research at the office at 1:30AM. 
Jayson from IP has been very helpful and I hope I can get things going in the morning.

IT guy even told me that he'll read up on the router for his own learning/knowledge and to assist me if I still have issues.

I will followup when I succeed, because one way or another I will succeed. 
Post 22 made on Friday January 17, 2014 at 10:07
lippavisual
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Mario,

What exactly was your problems? It should be just plug and play for the most part.
Post 23 made on Saturday January 18, 2014 at 07:52
edizzle
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Dude. You got it all wrong! It's all wireless now!!
I love supporting product that supports me!
OP | Post 24 made on Sunday January 19, 2014 at 03:53
Mario
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On January 17, 2014 at 10:07, lippavisual said...
Mario,

What exactly was your problems? It should be just plug and play for the most part.

Nothing with 750 or RouterBoard in general is plug and play.

In the end help from fellas on IP and following this video nbsp;did the trick.
OP | Post 25 made on Sunday January 19, 2014 at 04:02
Mario
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To summarize for anyone that might be new to multiple static IP addresses on cable based systems.

My local Comcast provided the gateway (CG3000DCR). 
After a phone call to business tech support, they (Comcast) removed firewall, port forwarding, DHCP server and few other things, which put the gateway into bridge mode (or as close to it as you can get).
I could have also done it myself if I knew which settings to disable.

With Comcast, there is no username, no password, no PPPoE, that needs to be setup in the router, which makes things simple.

Tell the router, in my case Mikrotik RB750GL, which one of the 5 (or 100) IP addresses you want to use, configure about 10 other things (covered in the video) and you're ready to go.
If I wanted another network setup, I would follow same process until I ran out of addresses. 

As someone pointed out, if the gateway doesn't have enough ports (mine has 4), than simple, unmanaged network switch between gateway and n-routers will do the trick.
Post 26 made on Sunday January 19, 2014 at 09:04
Rob Grabon
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Thank you all for the education.
Great thread.
Technology is cheap, Time is expensive.
Post 27 made on Sunday January 19, 2014 at 11:58
fcwilt
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So what did the IT guy use for his router? Was he upset that he had to add more hardware?
Regards, Frederick C. Wilt
Post 28 made on Sunday January 19, 2014 at 16:01
lippavisual
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On January 19, 2014 at 03:53, Mario said...
Nothing with 750 or RouterBoard in general is plug and play.

True. But I assumed you are/were fluent with RB.
OP | Post 29 made on Sunday January 19, 2014 at 16:24
Mario
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On January 19, 2014 at 11:58, fcwilt said...
So what did the IT guy use for his router? Was he upset that he had to add more hardware?

IT was always going to use a Watchguard. I don't have a specific model, but it looks like  Watchguard XTM 515 - WG515001 or higher.

He wasn't upset at all as the separate network, or the additional static IP addresses didn't affect him at all.
He told me that in Watchguard he typed the WAN IP, Submask, Gateway and the 2 DNS addresses and he was done.

Truth be told, my limited (non-existent really) knowledge into how multiple IP addresses are handled was the culprit.

Now I know that no matter if I get 1 or a million IP addresses, all I have to do is configure my router to use one of them and that's all there is to it. 

I'm still unsure how I could take advantage of the other 3 addresses,
Also, if single router can be configured to accept multiple WAN addresses, can I use single WAN port or does each IP address need to have it's own plug?
I'll read up on it when I have a free minute.
OP | Post 30 made on Sunday January 19, 2014 at 16:25
Mario
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On January 19, 2014 at 16:01, lippavisual said...
True. But I assumed you are/were fluent with RB.

Nope, total nOOb. I have it setup in my own house but I haven't played with static IPs to this point, nor have I handled multiple IPs scenario.

 
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