ER-3 -Comcast Fiber

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

then how do i get dhcp on eth1 and get back into the router?

It should go there directly. not sure what you mean by "back in". DHCP isn't needed to access anything.

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

OK just so I am following correctly.. eth0 is my wan..

layer3 ip///

and the eth1 is

my usable lan?

If set by the wizard that way, yes.

[mroth911]

ok so eth1.. that has the 192.168.1 .. what do i put there>

[JaredBusch]

@mroth911 said in ER-3 -Comcast Fiber:

then how do i get dhcp on eth1 and get back into the router?

Is your entire LAN a public network? If not your LAN is a private range that you setup.

[JaredBusch]

@scottalanmiller said in ER-3 -Comcast Fiber:

@mroth911 said in ER-3 -Comcast Fiber:

then how do i get dhcp on eth1 and get back into the router?

It should go there directly. not sure what you mean by "back in". DHCP isn't needed to access anything.

@scottalanmiller He has his own public IP block. noted as LAN from Comcast.

[mroth911]

I have my own public block..

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

THEN I HAVE LAN BLOCK
USABLE IP BLOCK X.X.X.X./27
USABBLE RANGE X.X.X.X-X.X.X.X.
USABLE SUBMET MASK X.X.X.224

Why do you have a LAN block? What is its purpose?

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

I have my own public block..

But why? Is there a purpose to it? You could just not use it.

[mroth911]

IDK!

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

IDK!

Then ignore it and set up as usual. you only want that if you REALLY know why, otherwise, ignore it.

[mroth911]

https://business.comcast.com/help-and-support/ethernet/comcast-business-ethernet-equipment-configuration/

[mroth911]

Thats what i was given from tech support

[JaredBusch]

Ok, I just reread some of your posts here. Let me make you a screenshot.

[mroth911]

ok thank you so much!

[JaredBusch]

Basic Wizard

I always expand the secondary LAN, give it a non-default IP, a /24, and disable the DHCP on it. No reason to use resources.

You can just ignore the LAN block from Comcast.

[mroth911]

so if i configure any ethernet port on a computer connected to the network i will be about to use the public ip ?

[JaredBusch]

@scottalanmiller said in ER-3 -Comcast Fiber:

@mroth911 said in ER-3 -Comcast Fiber:

I have my own public block..

But why? Is there a purpose to it? You could just not use it.

This. If you did not ask for your own public IP block, then ignore it. Though it does likely mean you are overpaying for your internet service.

[JaredBusch]

@mroth911 said in ER-3 -Comcast Fiber:

so if i configure any ethernet port on a computer connected to the network i will be about to use the public ip ?

No, that is not how that works and is not something I care to try and explain.

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

so if i configure any ethernet port on a computer connected to the network i will be about to use the public ip ?

You can do that, but you probably don't want that. That's going to be really limiting and really not add any benefit if those machines are not servers. If this was for a DMZ, it would be different.

[mroth911]

I have 29 static ip address. that i have public facing servers.