Using a 2610 setup with a cable modem connection? 1

[paintballer4lfe]

Alright im trying to get my router to work with my motorola surfboard modem(i know old and why do i have a setup like this, dont worrie its just me messing around with network equipment)

i read up on this post:

http://www.tek-tips.com/viewthread.cfm?qid=1174179&page=1

My setup:
Timewarner/Roadrunner with Dyndns domain, using dynamic IP.
I also need ports open through NAT these ports:
HTTP, HTTPS, IMAP, SMTP, FTP, and others.
I followed the posts config but switched around some IP's to accommodate my IP scheme from ISP and my LAN setup.

So far pinging IP's from the router wont work with that setup.

Can someone help me setup this router, i took and graduated from CCNA but it didnt really teach us on this kind of setup, if someone can help please do, if you need more info, just post what you need.

some basic info:
LAN IP scheme:
192.168.1.1 255.255.255.0
need to have minimum of 20 computers on subnet(if using different)
modem setup
107.10.x.x 255.255.224.0

Thanks to whoever can help me

 

[greenemk]

Please post a scrubbed config...

CCNA, CCNP, Sec+

 

[paintballer4lfe]

Main-2610#show run
Building configuration...

Current configuration : 1142 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Main-2610
!
boot-start-marker
boot-end-marker
!
enable secret *****
enable password ***
!
no aaa new-model
ip subnet-zero
no ip source-route
ip cef
!
!
no ip domain lookup
no ip dhcp conflict logging
ip dhcp excluded-address 107.10.0.0 107.10.10.61
!
ip dhcp pool internal
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 209.18.47.61 209.18.47.62
lease 5
!
no ip bootp server
!
!
!
!
interface Ethernet0/0
description DMZ
ip address dhcp
no ip unreachables
no ip proxy-arp
ip nat outside
half-duplex
no cdp enable
no mop enabled
!
interface Serial0/0
no ip address
shutdown
no fair-queue
no cdp enable
!
ip nat inside source list 1 interface Ethernet0/0 overload
no ip http server
ip classless
!
!
access-list 1 permit 107.10.0.0 0.0.31.255
no cdp run
snmp-server community public RO
!
line con 0
exec-timeout 0 0
password 991
logging synchronous
login
line aux 0
line vty 0 4
access-class 1 in
password nate
login
!
!
end

Main-2610#

i only have one ethernet interface for now, i just want to get the router working before i buy the 4 port WIC.
NOTE: tested my connectivity by trying to ping IP addresses, came out 0% successfull

 

[imbadatthis]

im just reading the config and commenting as it goes:

ip dhcp excluded-address 107.10.0.0 107.10.10.61

you aren't giving out public ips, I think what u want is:
ip dhcp excluded-address 192.168.1.1

above line will stop your DHCP from giving out its own IP to other clients.

ip nat inside source list 1 interface Ethernet0/0 overload
no ip http server
ip classless
!
!
access-list 1 permit 107.10.0.0 0.0.31.255

your access-list 1 should be

access-list 1 permit 192.168.1.0 0.0.0.255

you have a dhcp that is giving out 192.168.1.0/24 why are you creating NAT on 107.10.0.0/21

now this has nothing to do with your ping. just config issues.

I suspect that your setup is Internet---> Modem (107.10.x.x) ---> Cisco Router.

do the following:

sh ip route

above command should give you at least one default route with source that is usually your DHCP address if NOT then thats your problem. something like this

S*   0.0.0.0/0 [254/0] via 192.168.1.254

my setup is Internet -->(Public IP) adsl router (192.168.1.254)--> Cisco Router

sh ip inter brief
this should give you the IP address of your Fast Ethernet interface

EarlGrey-Hot#sh ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            192.168.1.64    YES DHCP   up                    up

notice how both status and Protocol show as UP. and that the IP address on FA0/0 is part of the subnet that my default route originated from?

see if you are getting an IP address from your modem.
If yes, see what said IP address is. Try pinging with that interface's IP address:

ping ip 8.8.8.8 source fa0/0

If you dont have a default route (although u really should be getting it as dhcp is defined under fa0/0) you can use the following command to hardcode it in :

ip route 0.0.0.0 0.0.0.0 fa0/0
[code]

if you are getting an IP address, and ping still not going through, its probably your modem that is blocking ping. See if there is a firewall active on the modem.

Hope this helps, 
post your output for said commands if you need more help. 

cheers, 

We must go always forward, not backward
always up, not down and always twirling twirling towards infinity.

 

[paintballer4lfe]

So far the pinging works, but im just waiting on the WIC module i just bought(fast ethernet)
do you have any example commands or anything for the interface im going to use to the LAN?
I.E. setup commands, NAT, DHCP etc?