RE: Reflexive access-list

From: Hung, Sing-Yu (Sing-Yu.Hung@pccw.com)
Date: Tue Oct 29 2002 - 03:47:46 GMT-3


Hi,

        I have the below config

        
------(e3/1)r13(atm1/0)--.1--------30.30.30.0/24-----------.2--s0(ti)e0-----

r13#sh run int a1/0
Building configuration...

Current configuration : 164 bytes
!
interface ATM1/0
 ip address 30.30.30.1 255.255.255.0
 ip access-group inbound in
 ip access-group outbound out
 atm ilmi-keepalive
 pvc 0/100
  ubr 256
 !
end
r13#sho access-l
Extended IP access list inbound
    permit ospf any any (1380 matches)
    permit tcp any eq bgp any eq bgp
    evaluate tcptraffic
Extended IP access list outbound
    permit ip any any reflect tcptraffic
    permit tcp any any reflect tcptraffic
    permit tcp any eq telnet any reflect tcptraffic
    permit icmp any any reflect tcptraffic
Reflexive IP access list tcptraffic

why I can't ping router (t1)
r13#ping 30.30.30.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 30.30.30.2, timeout is 2 seconds:
.....
r13#sho access-l
Extended IP access list inbound
    permit ospf any any (1388 matches)
    permit tcp any eq bgp any eq bgp
    evaluate tcptraffic
Extended IP access list outbound
    permit ip any any reflect tcptraffic
    permit tcp any any reflect tcptraffic
    permit tcp any eq telnet any reflect tcptraffic
    permit icmp any any reflect tcptraffic
Reflexive IP access list tcptraffic

Bradford Hung

 Pacific Century CyberWorks
 Tel: 288 33125

-----Original Message-----
From: Hansang Bae [mailto:hbae@nyc.rr.com]
Sent: Monday, October 28, 2002 5:59 AM
To: ccielab@groupstudy.com
Subject: RE: Reflexive access-list

>-----Original Message-----
>From: Ahmed Mamoor Amimi [mailto:mamoor@ieee.org]
>Sent: Friday, October 25, 2002 8:43 AM
>To: ccielab@groupstudy.com
>Subject: Reflexive access-list
>Can someone point me to an example and notes of reflexive access-list.

I highly recommend Gil Held's Cisco Access List Field Guide.

hsb



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