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Re: IP unnumbered and CBAC [7:48721] posted 07/15/2002
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>From the config I see, here's what I'm interpreting:

Router instructed to start monitoring packets coming in s0.1 as defined in
the CBAC statement corp.  Then there's an ACL 100 on the e0/0, going in the
router, but if that's for CBAC, then it's on the wrong interface.  CBAC
needs an ACL to block traffic before it can monitor traffic and allow it to
pass back out.

So if you want to monitor the traffic going back out with CBAC, you'd need
an ACL on the s0.1 out. So I'd permit the inside networks to go out, and
block all other traffic, and then CBAC will let the traffic that came in
s0.1 to go back out.



""Dennis Cooper""  wrote in message
news:200207150308.DAA05629@xxxxxxxxxxxxxxxxx
> service timestamps debug datetime msec localtime show-timezone
> service timestamps log datetime msec localtime show-timezone
> service password-encryption
> !
> hostname firewall
> !
> boot system flash c3620-io-mz.120-3.T3.bin
> logging buffered 100000 debugging
> enable secret 5 $1$hqZ4$k9Mvt5yfvbpipYmFGbTSS/
> !
> username Brisbane password 7 xxxxxxxxx
> username Adelaide password 7 xxxxxxxx
> username Perth password 7 xxxxxxx
> clock timezone EST 10
> ip subnet-zero
> ip host Perth 125.1.100.24
> ip domain-name corp.com.au
> ip name-server 125.1.10.3
> !
> ip inspect name corp tcp
> ip inspect name corp udp
> ip inspect name corp http
> ip inspect name corp ftp
> ip inspect name corp smtp
> frame-relay de-list 1 protocol ip
> frame-relay switching
> isdn switch-type basic-net3
> !
> !
> !
> interface BRI0/0
>  description 64K ISDN On-Ramp Backup Service to Brisbane & Adelaide
>  no ip address
>  no ip directed-broadcast
>  encapsulation ppp
>  dialer pool-member 1
>  isdn switch-type basic-net3
>  ppp authentication chap
> !
> interface Ethernet0/0
>  description Sydney Local Ethernet Segment
>  ip address 172.25.201.1 255.255.0.0
>  no ip directed-broadcast
>  no keepalive
> !
> interface Ethernet1/0
>  desc Sydney untrusted segment
>  ip address 192.168.3.3 255.255.255.0
>  ip access-group 100 in
>  no ip directed-broadcast
> !
> interface Serial1/0
>  description 192K CIR - 576K ACCESS to Perth
>  mtu 800
>  no ip address
>  no ip directed-broadcast
>  encapsulation frame-relay
>  no ip mroute-cache
>  priority-group 1
>  frame-relay lmi-type ansi
>  frame-relay route 16 interface Serial1/1 16
>  frame-relay route 20 interface Serial1/1 20
>  frame-relay route 22 interface Serial1/1 22
> !
> interface Serial1/0.1 point-to-point
>  description 192K CIR PVC to Perth
>  mtu 800
>  bandwidth 192
>  ip unnumbered Ethernet0/0
>  ip inspect corp in
>  no ip directed-broadcast
>  backup delay 5 10
>  backup interface Dialer0
>  frame-relay de-group 1 17
>  frame-relay interface-dlci 17
>  frame-relay payload-compression packet-by-packet
> !
> interface Serial1/0.2 point-to-point
>  description 16K PVC to Adelaide
>  mtu 800
>  ip unnumbered Ethernet0/0
>  no ip directed-broadcast
>  backup delay 5 10
>  backup interface Dialer1
>  frame-relay de-group 1 21
>  frame-relay interface-dlci 21
>  frame-relay payload-compression packet-by-packet
> !
> interface Serial1/0.3 point-to-point
>  description 16K PVC to Brisbane
>  mtu 800
>  ip unnumbered Ethernet0/0
>  no ip directed-broadcast
>  backup delay 5 10
>  backup interface Dialer2
>  frame-relay de-group 1 23
>  frame-relay interface-dlci 23
>  frame-relay payload-compression packet-by-packet
> !
> interface Serial1/1
>  description Frame Relay Voice Service to Micom Marathon
>  mtu 800
>  no ip address
>  no ip directed-broadcast
>  encapsulation frame-relay
>  shutdown
>  clockrate 500000
>  frame-relay lmi-type ansi
>  frame-relay intf-type dce
>  frame-relay route 16 interface Serial1/0 16
>  frame-relay route 20 interface Serial1/0 20
>  frame-relay route 22 interface Serial1/0 22
> !
> interface Dialer0
>  description 64K ISDN Backup Service to Perth
>  ip unnumbered Ethernet0/0
>  no ip directed-broadcast
>  encapsulation ppp
>  dialer remote-name Perth
>  dialer pool 1
>  dialer-group 1
>  ppp authentication chap
> !
> interface Dialer1
>  description 64K ISDN Backup Service to Adelaide
>  ip unnumbered Ethernet0/0
>  no ip directed-broadcast
>  encapsulation ppp
>  dialer remote-name Adelaide
>  dialer string XXXXXXXXXXXXX
>  dialer pool 1
>  dialer-group 1
>  ppp authentication chap
> !
> interface Dialer2
>  description 64K ISDN Backup Service to Brisbane
>  ip unnumbered Ethernet0/0
>  no ip directed-broadcast
>  encapsulation ppp
>  dialer remote-name Brisbane
>  dialer string XXXXXXXXXXXX
>  dialer pool 1
>  dialer-group 1
>  ppp authentication chap
> !
> router eigrp 69
>  redistribute static route-map static2eigrp
>  network 172.25.0.0
>  network 192.168.3.0
>  default-metric 1000 1000 254 1 1500
>  no auto-summary
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 125.1.100.24
> ip route 172.16.10.0 255.255.255.0 192.168.3.1
> ip route 172.16.15.0 255.255.255.0 192.168.3.1
> ip route 172.16.20.0 255.255.255.0 192.168.3.1
> ip route 192.168.4.0 255.255.255.0 192.168.3.1
> ip route 192.168.7.0 255.255.255.0 192.168.3.1
> ip route 192.168.10.0 255.255.255.0 192.168.3.1
> ip route 192.168.52.0 255.255.255.0 172.25.201.3
> ip route 192.168.144.0 255.255.255.0 192.168.3.1
> no ip http server
> !
> !
> map-class frame-relay cir64k
>  frame-relay traffic-rate 192000 500000
>  frame-relay adaptive-shaping becn
> !
> map-class frame-relay cir32k
>  frame-relay traffic-rate 32000 40000
>  frame-relay adaptive-shaping becn
> !
> map-class frame-relay cir16k
>  frame-relay traffic-rate 16000 24000
>  frame-relay adaptive-shaping becn
> access-list 1 permit 192.168.4.0 0.0.0.255
> access-list 1 permit 192.168.7.0 0.0.0.255
> access-list 1 permit 192.168.10.0 0.0.0.255
> access-list 1 permit 192.168.144.0 0.0.0.255
> access-list 1 permit 172.16.10.0 0.0.0.255
> access-list 1 permit 172.16.15.0 0.0.0.255
> access-list 1 permit 172.16.20.0 0.0.0.255
> access-list 100 permit icmp any any
> access-list 100 permit ip 192.168.3.0 0.0.0.255 172.25.0.0 0.0.255.255
> access-list 100 permit tcp any 203.19.170.0 0.0.0.31 eq 3389
> access-list 100 permit tcp any 203.19.170.0 0.0.0.31 eq www
> access-list 100 permit tcp any 203.19.170.0 0.0.0.31 eq 443
> access-list 100 permit tcp any 203.19.170.0 0.0.0.31 eq ftp-data
> access-list 100 permit tcp any 203.19.170.0 0.0.0.31 eq ftp
> access-list 100 permit tcp any any established
> priority-list 1 protocol ip normal
> priority-list 1 protocol cdp normal
> priority-list 1 default high
> dialer-list 1 protocol ip permit
> route-map static2eigrp permit 10
>  match ip address 1
> !
> snmp-server engineID local 00000009020000107B309C81
> snmp-server community public RO
> alias exec sa show access-list
> !
> line con 0
>  transport input none
> line aux 0
> line vty 0 4
>  password 7 XXXXXXXXXXXXXX
>  login
> !
> ""Steven A. Ridder""  wrote in message
> news:200207150158.BAA27946@xxxxxxxxxxxxxxxxx
> > not enough info to tell
> > Need more of the config.
> >
> >
> > ""Dennis Cooper""  wrote in message
> > news:200207150151.BAA26981@xxxxxxxxxxxxxxxxx
> > > Hi Steve
> > >
> > > Here is an extract from the config - access-list 100 controls traffic
> from
> > > the "untrusted" section of the company being migrated.
> > >
> > > "firewall" is the name of the ip inspect policy
> > >
> > > interface Ethernet0/0
> > >  description Sydney Local Ethernet Segment
> > >  ip address 172.25.201.1 255.255.0.0
> > >  no keepalive
> > > !
> > > interface Ethernet1/0
> > >  ip address 192.168.3.3 255.255.255.0
> > >  ip access-group 100 in
> > > !
> > > interface Serial1/0
> > >  description 192K CIR - 576K ACCESS to Head Office
> > >  mtu 800
> > >  no ip address
> > >  encapsulation frame-relay
> > >  no ip mroute-cache
> > >  priority-group 1
> > >  frame-relay lmi-type ansi
> > >  frame-relay route 16 interface Serial1/1 16
> > >  frame-relay route 20 interface Serial1/1 20
> > >  frame-relay route 22 interface Serial1/1 22
> > > !
> > > interface Serial1/0.1 point-to-point
> > >  description 192K CIR PVC to Head Office
> > >  mtu 800
> > >  backup delay 5 10
> > >  backup interface Dialer0
> > >  ip unnumbered Ethernet0/0
> > >  ip inspect firewall in
> > >  bandwidth 192
> > >  frame-relay de-group 1 17
> > >  frame-relay interface-dlci 17
> > >  frame-relay payload-compression packet-by-packet
> > >
> > >
> > > ""Steven A. Ridder""  wrote in message
> > > news:200207131318.NAA13216@xxxxxxxxxxxxxxxxx
> > > > show me the configs
> > > >
> > > > ""Dennis Cooper""  wrote in message
> > > > news:200207131051.KAA04100@xxxxxxxxxxxxxxxxx
> > > > > Hi guys
> > > > >
> > > > > The scenario is two customer networks merging in the same building
> and
> > > we
> > > > > have a Cisco 3620 in between the two LAN networks. (E0/0 and E1/0)
> > > > >
> > > > >
> > > > > S0/0 -----------3620---------------E0/0 172.25.0.0/16
> > > > >                                 ---------------E1/0    192.168.3.0
> > > > >
> > > > >
> > > > >
> > > > > There is a Frame Relay service to head office on interface Serial
> 0/0
> > > and
> > > > is
> > > > > currently ip unnmbered to the E0/0 interface.
> > > > >
> > > > > Using CBAC I cannot get  the ip inspect stuff to work and I
suspect
> > > > either
> > > > > 1. the code 12.0(3)T FFS
> > > > > 2. IP unnumbered
> > > > >
> > > > > Q.  Any one done this before?
> > > > >
> > > > > Regards
> > > > >
> > > > > Dennis Cooper
> > > > > Lab date 13/08/2002 (but who's counting)




Message Posted at:
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