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--- networking:cisco-1841-config-nat [12/11/2022 08:30] – created - external edit 127.0.0.1
+++ networking:cisco-1841-config-nat [04/06/2026 09:19] (current) – andrew
@@ Line 1: / Line 1: @@
 ====== ADSL 1841 NAT config ======
+Almost nothing yet
+===== DNS server =====
+<code>
+configure terminal
+ ip dns server
+ ip domain lookup
+ ip name-server 1.1.1.1
+ ip host printer.int.domain.com 192.168.1.41
+end
+</code>
+<code>
+Current configuration : 3678 bytes
+!
+! Last configuration change at 20:35:55 BST Tue May 12 2026
+! NVRAM config last updated at 12:24:03 BST Mon Apr 20 2026
+! NVRAM config last updated at 12:24:03 BST Mon Apr 20 2026
+version 15.1
+service timestamps debug datetime msec
+service timestamps log datetime msec
+service password-encryption
+!
+hostname 1841-isp
+!
+boot-start-marker
+boot system flash:c1841-advipservicesk9-mz.151-4.M6.bin
+boot-end-marker
+!
+!
+logging buffered 51200 warnings
+enable secret 5 $T0P_Secret
+!
+no aaa new-model
+!
+clock timezone GMT 0 0
+clock summer-time BST recurring 4 Sun Mar 1:00 4 Sun Oct 2:00
+dot11 syslog
+ip source-route
+!
+!
+ip dhcp excluded-address 192.168.64.1 192.168.64.100
+!
+ip dhcp pool lan
+ network 192.168.64.0 255.255.255.0
+ default-router 192.168.64.1
+ dns-server 1.1.1.1
+ domain-name rainsbrook.co.uk
+!
+!
+!
+ip cef
+ip domain list rainsbrook.co.uk
+ip domain name rainsbrook.co.uk
+ip name-server 1.1.1.1
+ipv6 source-route
+ipv6 unicast-routing
+ipv6 cef
+ipv6 multicast-routing
+!
+multilink bundle-name authenticated
+!
+crypto pki token default removal timeout 0
+!
+!
+!
+!
+license udi pid CISCO1841 sn FCZ14096XXX
+username admin password 7 not_quite_so_secret
+!
+redundancy
+!
+!
+ip ssh time-out 60
+!
+!
+interface FastEthernet0/0
+ description LAN
+ ip address 192.168.64.1 255.255.255.0
+ ip nat inside
+ ip virtual-reassembly in
+ duplex auto
+ speed auto
+!
+interface FastEthernet0/1
+ description WAN to ISP
+ no ip address
+ duplex auto
+ speed auto
+ pppoe enable group global
+ pppoe-client dial-pool-number 1
+!
+interface Dialer0
+ description WAN link to ISP
+ ip address negotiated
+ ip nat outside
+ ip virtual-reassembly in
+ encapsulation ppp
+ dialer pool 1
+ dialer idle-timeout 0
+ dialer persistent
+ dialer-group 1
+ ipv6 enable
+ ipv6 traffic-filter adsl-ipv6 in
+ ppp chap hostname user1234@a.1
+ ppp chap password 7 1234abcd1234abcd
+!
+ip forward-protocol nd
+no ip http server
+no ip http secure-server
+!
+!
+ip dns server
+ip dns spoofing
+ip nat inside source list 1 interface Dialer0 overload
+ip route 0.0.0.0 0.0.0.0 Dialer0
+!
+ip access-list standard snmpv4
+ permit 123.123.123.123
+!
+access-list 1 permit 192.168.64.0  0.0.0.255
+access-list 22 permit 234.234.234.234 log
+access-list 22 deny   any log
+dialer-list 1 protocol ip permit
+ipv6 route ::/0 Dialer0
+!
+!
+!
+!
+snmp-server community xxxx RO 22
+snmp-server community secret123 RO snmpv4
+snmp-server ifindex persist
+snmp-server location planetearth
+snmp-server contact goaway@rainsbrook.co.uk
+!
+!
+control-plane
+!
+!
+banner exec ^CC
+Session established to $(hostname) on line $(line)^C
+banner login ^CC
++-------------------------------------------------------+
+|             This is a private system and              |
+|      is only for the use of authorized personnel.     |
+|                                                       |
++-------------------------------------------------------+
+|                                                       |
+|  If you are allowed access, you will have been told.  |
+|    If you have to ask anyone if you are authorized,   |
+|                                                       |
+|                   -*YOU AREN'T*-                      |
+|                                                       |
++-------------------------------------------------------+
+^C
+banner motd ^CCx^C
+!
+line con 0
+ password 7 12341234abcd
+ login
+line aux 0
+line vty 0 4
+ access-class 22 in
+ password 7 12341234abcd
+ login
+ transport input all
+!
+scheduler allocate 20000 1000
+ntp server 216.239.35.0
+ntp server 1.1.1.1
+ntp server 216.239.35.4
+end
+-isp#
+</code>
+----
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