http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7829736 en Sat, 26 Mar 2022 13:56:24 EDT Sat, 26 Mar 2022 13:56:24 EDT http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7909206 http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7909206 Mon, 08 Sep 2003 14:14:26 EDT http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7871082 http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7871082 Thu, 04 Sep 2003 08:24:13 EDT http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7869936
I'm not sure what route-map and match ip do, so can't answer that one for you.

The 12.x.x.x addresses are the public IP addresses assigned on ex-ATTBI comcast networks. They are assigned dynamically by DHCP.

The loopback interface is just the interface the router uses to refer to itself, usually denoted with a 127.0.0.1 localhost address. It is not necessary to create this one in your config as it is already configured in your router by default.

The 10.x.x.x addresses on the other hand are private addreses, not publicly accessible on the internet. Generally your modem and head end (where you connect to the local office and then to the internet) are assigned this type of address.

Hope this sheds a little light on your problem!]]> http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7869936 Thu, 04 Sep 2003 01:23:41 EDT http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7868399 http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7868399 Wed, 03 Sep 2003 22:23:06 EDT http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7847688
What is the difference between access list 10 and 120?
What are these commands going to change:
route-map nonat permit 10
match ip address 120

What are the 12. addresses? Are they coming off of Comcast's network automatically? I don't remember seeing any 12.'s before.

As far as my loopback goes, isn't that suppose to have my global ip? The one that I use to get to the internet?

I haven't tried anything yet because there might be a problem at my house, so I have a service call setup for tomorrow, but please let me know about the changes to the config and if you could, the pro's and con's vs. the way I had it and your changes. I am trying to learn as I go to - LOL!

Thanks man,
Christo]]> http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7847688 Mon, 01 Sep 2003 20:37:26 EDT http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7845078
Here is what I would try:

remove the ip default-gateway string, its not needed. Your loopback adapter will have you public IP address, which will talk to the cable-modems IP address, which talks to the outside world.

remove your loopback0 adapter. (so the router can create it automatically)

remove the ip nat inside source list 10 string as well, and replace with:

ip nat inside source route-map nonat pool LAN_POOL overload

then add the following:

access-list 120 permit ip 10.1.1.0 0.0.0.255 any

remove your access list 10

route-map nonat permit 10
match ip address 120
[then type exit to return to the normal config, then end, then reload, yes on save, confirm reload]

That should give your cable-modem0 interface a 10. address, automatically create a nat pool called LAN_POOL with a 12. address, and create your loopback adapter with that 12. address.

That should work with comcast. Let me know if you are not sure how to perform the tasks mentioned above.

Maven]]> http://www.dslreports.com/forum/Re-UBR-924-and-Comcast-7845078 Mon, 01 Sep 2003 15:23:09 EDT http://www.dslreports.com/forum/UBR-924-and-Comcast-7829736
Here is a copy of my current config - please help!

version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname routerone_pa
!
clock timezone - -5
ip subnet-zero
ip tftp source-interface cable-modem0
no ip domain-lookup
ip dhcp excluded-address 10.1.1.250
ip dhcp excluded-address 10.1.1.249
ip dhcp excluded-address 10.1.1.10
ip dhcp excluded-address 10.1.1.3
ip dhcp excluded-address 10.1.1.2
ip dhcp excluded-address 10.1.1.1
!
ip dhcp pool LAN_USERS
network 10.1.1.0 255.255.255.0
domain-name (removed - but I know what this is)
dns-server (removed - but I know what this is)
default-router 10.1.1.250
!
ip audit notify log
ip audit po max-events 100
call rsvp-sync
!
!
!
!
!
!
!
!
interface Loopback0
no ip address
!
interface Ethernet0
ip address 10.1.1.250 255.255.255.0
ip nat inside
no ip mroute-cache
no cdp enable
!
interface cable-modem0
ip nat outside
no ip mroute-cache
no cable-modem compliant bridge
cable-modem dhcp-proxy nat LAN_POOL
!
ip default-gateway 10.100.120.1 (not sure if this is the problem - don't know where this info is obtained)
ip nat inside source list 10 pool LAN_POOL overload
ip classless
no ip http server
no ip http cable-monitor
!
access-list 10 permit 10.1.1.0 0.0.0.255
no cdp run
snmp-server engineID local 00000009020000036BD6B7C0
snmp-server packetsize 4096
snmp-server enable traps tty
snmp-server manager
!
voice-port 0
input gain -2
output attenuation 0
!
voice-port 1
input gain -2
output attenuation 0
!
!
line con 0
line vty 0 4
login
!
scheduler max-task-time 5000
end]]> http://www.dslreports.com/forum/UBR-924-and-Comcast-7829736 Sat, 30 Aug 2003 13:42:09 EDT