Brian Fairchild

After using a Cisco 837 router for sometime now I have upgraded my home network to a Cisco 1720 router with a wic-1adsl card and a cisco 1548u micro switch. You can pick these units up at a very reasonable price now on Ebay.com. I was forced to do this because of the bandwidth and limited memory of the Cisco 837 router. The router stock comes with a old version of IOS which doesn't recongnize the WIC-1ADSL card, so you will need to get a later version of IOS. I found the version that works best is the c1700-Sy7-Mz.123-4.T3 version. You will also need to make sure you have at least 48 megs of memory and at 16 meg flash card. Here is my current config of my working router:

version 12.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot system flash:c1700-Sy7-Mz.123-4.T3
boot-end-marker
!
no logging buffered
enable secret 5 $1$QpwW$Z4.Nt4C/OcW6eId9ThcRe.
enable password xxxxpasswordxxxx <-- your router password
!
username CRWS_Santhosh privilege 15 password 0 $1$W1fA$o1oSEpa1975878949
username Router password 0 xxxxpasswordxxxx <-- your router password
username CRWS_Venky privilege 15 password 0 $1$W1fA$o1oSEpa1433198556
username CRWS_Giri privilege 15 password 0 $1$W1fA$o1oSEpa538999584
memory-size iomem 25
no aaa new-model
ip subnet-zero
!
!
ip name-server 206.13.31.12
ip name-server 68.94.157.1
ip name-server 192.168.2.8
ip dhcp excluded-address 192.168.2.8
ip dhcp excluded-address 192.168.2.1
ip dhcp excluded-address 192.168.2.1 192.168.2.99
!
ip dhcp pool POOL1
network 192.168.2.0 255.255.255.0
!
ip dhcp pool CLIENT
import all
default-router 192.168.2.1
lease 0 2
!
!
ip cef
!
!
!
!
interface Null0
no ip unreachables
!
interface ATM0
no ip address
ip nbar protocol-discovery
no ip mroute-cache
no atm ilmi-keepalive
pvc 0/35
pppoe-client dial-pool-number 1
!
dsl operating-mode auto
!
interface FastEthernet0
ip address 192.168.2.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip route-cache same-interface
ip route-cache flow
ip tcp adjust-mss 1452
speed auto
full-duplex
arp timeout 60
no cdp enable
hold-queue 4096 in
hold-queue 4096 out
!
interface Serial0
no ip address
shutdown
!
interface Dialer1
ip address negotiated
ip mtu 1492
ip nat outside
encapsulation ppp
dialer pool 1
dialer remote-name redback
dialer-group 1
ppp authentication pap chap callin
ppp chap hostname This e-mail address is being protected from spambots. You need JavaScript enabled to view it
ppp chap password 0 xxxxpasswordxxxx <-- your ATT password
ppp pap sent-username This e-mail address is being protected from spambots. You need JavaScript enabled to view it password 0 xxxxpasswordxxxx <-- your ATT password
ppp ipcp dns request
ppp ipcp wins request
!

!
ip nat translation timeout 3600
ip nat translation tcp-timeout 3600
ip nat translation udp-timeout 240
ip nat translation finrst-timeout 30
ip nat translation dns-timeout 45
ip nat inside source list 102 interface Dialer1 overload
ip nat inside source static tcp 192.168.2.12 22 interface Dialer1 122
ip nat inside source static tcp 192.168.2.8 80 interface Dialer1 80
ip nat inside source static udp 192.168.2.8 143 interface Dialer1 143
ip nat inside source static tcp 192.168.2.8 143 interface Dialer1 143
ip nat inside source static tcp 192.168.2.8 22 interface Dialer1 22
ip nat inside source static tcp 192.168.2.8 7 interface Dialer1 7
ip nat inside source static udp 192.168.2.8 7 interface Dialer1 7
ip nat inside source static tcp 192.168.2.8 2703 interface Dialer1 2703
ip nat inside source static udp 192.168.2.8 2703 interface Dialer1 2703
ip nat inside source static tcp 192.168.2.8 110 interface Dialer1 110
ip nat inside source static tcp 192.168.2.8 21 interface Dialer1 21
ip nat inside source static tcp 192.168.2.8 25 interface Dialer1 25
ip nat inside source static tcp 192.168.2.8 23 interface Dialer1 23
ip nat inside source static tcp 192.168.2.8 2812 interface Dialer1 2812
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
no ip http server
ip http authentication local
!
!
!
access-list 102 permit ip 192.168.2.0 0.0.0.255 any
access-list 103 deny   tcp any host 66.114.48.49 eq www
access-list 199 permit icmp any any
dialer-list 1 protocol ip permit
!
route-map BlackHoleICMP permit 10
match ip address 199
set interface Null0
!
!
control-plane
!
banner motd ^CC

****************************
* WARNING BANNER *
****************************

WARNING - authorized users only

The owner and any subsidiary companies, has proprietary rights
over this system and data. Unauthorized access is unlawful and may
result in disciplinary action and/or legal proceedings.

Access to this system is monitored.
^C
!
line con 0
line aux 0
line vty 0 4
exec-timeout 120 0
login local
length 0
!
scheduler max-task-time 5000
ntp clock-period 17179991
ntp server 128.2.129.21
!
end