03-11-2003 07:00 PM - edited 03-02-2019 05:47 AM
Could someone explain the purpose of the nat outside statement on the BVI1 interface in this config. when there is already a nat inside on E1?
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Router
!
no logging buffered
no logging console
no logging monitor
no logging on
!
ip subnet-zero
ip name-server 10.4.1.1
ip name-server x.x.x.x
ip name-server x.x.x.x
!
ip inspect name myfw cuseeme timeout 3600
ip inspect name myfw ftp timeout 3600
ip inspect name myfw rcmd timeout 3600
ip inspect name myfw realaudio timeout 3600
ip inspect name myfw smtp timeout 3600
ip inspect name myfw tftp timeout 30
ip inspect name myfw udp timeout 15
ip inspect name myfw tcp timeout 3600
ip inspect name myfw h323 timeout 3600
!
bridge irb
!
!
interface Ethernet0
ip address 10.4.1.99 255.224.0.0
ip nat inside
no cdp enable
hold-queue 100 out
!
interface ATM0
no ip address
atm vc-per-vp 64
no atm ilmi-keepalive
pvc 0/35
encapsulation aal5snap
!
dsl operating-mode itu-dmt
bridge-group 1
hold-queue 224 in
!
interface BVI1
ip address dhcp client-id Ethernet0
ip access-group 111 in
ip nat outside
ip inspect myfw out
!
ip nat inside source list 102 interface BVI1 overload
ip classless
ip route 0.0.0.0 0.0.0.0 BVI1
no ip http server
!
!
no logging trap
logging source-interface Ethernet0
logging 10.4.1.98
access-list 23 permit 10.0.0.0 0.31.255.255
access-list 30 permit 10.4.1.2
access-list 102 permit ip 10.0.0.0 0.31.255.255 any
access-list 111 permit icmp any any administratively-prohibited
access-list 111 permit icmp any any echo
access-list 111 permit icmp any any echo-reply
access-list 111 permit icmp any any packet-too-big
access-list 111 permit icmp any any time-exceeded
access-list 111 permit icmp any any traceroute
access-list 111 permit icmp any any unreachable
access-list 111 permit udp any eq bootps any eq bootpc
access-list 111 permit udp any eq bootps any eq bootps
access-list 111 deny icmp any any redirect
access-list 111 deny ip any any
no cdp run
snmp-server community xxxxxxx RO 30
bridge 1 protocol ieee
bridge 1 route ip
!
line con 0
exec-timeout 120 0
stopbits 1
line vty 0 4
access-class 23 in
exec-timeout 120 0
password 7 123456789
login
length 0
!
03-11-2003 11:50 PM
Hi
NAT is configured on the router at the border of a stub domain (referred to as the inside network) and a public network such as the Internet (referred to as the outside network). NAT translates the internal local addresses to globally unique IP addresses before sending packets to the outside network.
So somehow you have to descide from which side you want to translate addresses.
So the inside command marks you the interface connected to the inside and
the outside command marks you the interface connected to the outside.
Hope that helps
Roger
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