topic Re: Pinging through ASA 5510 in Network Security

Pinging through ASA 5510

rpsribeiro — Mon, 11 Mar 2019 17:52:23 GMT

Hi,

i'm configuring a ASA 5510, i've the following partial configuration

interface ethernet 0/1

nameif Outside_net2
security-level 0
ip address 10.0.2.2 255.255.255.0

interface Ethernet0/3
nameif Inside_vlans
security-level 100
ip address 192.168.10.254 255.255.255.0
!

access-list nat_ADSL permit ip 192.168.10.0 255.255.255.0 any

access-list 100 permit icmp any any

access-list 110 permit icmp any any

global (Outside_net2) 1 10.0.2.3

nat (Inside_vlans) 1 access-list nat_ADSL

access-group 100 in interface Outside_net2

access-group 110 in interface Insidev_lans

At thie moment i don't have any other interfaces configured.

Behind interface Inside_vlans i've a switch with the IP 192.168.10.251 witha a default-gatewy 192.168.10.254

Next to the interface Outside_net2 i've an ADSL router with the IP 10.0.2.1 in the LAN interface.

When i ping from ASA to the ADSL Router or to the Switch everything it's ok, i can ping successfully from swith to ASA too, but when i try to ping from switch to the ADSL Router (10.0.2.1) it fails, for troubleshouting i've made a capture in both interfaces of ASA and i saw that the icm request pass in both interfaces, the icmp reply pass in the Outside_net2 interface but the packet doesn't appear in the interface Inside_vlans.

In the xlate table i've seen a PAT line to the switch IP.

Anyone can help me finding the solution for this problem?

Thank's in advance

Re: Pinging through ASA 5510

Federico Coto Fajardo — Fri, 28 May 2010 18:33:47 GMT

Hi,

In order to be able to PING through the ASA from the inside to the outside you need either one of two things:

1. An ACL allowing the echo-reply

2. Include inspection for ICMP

Federico.

Re: Pinging through ASA 5510

Panos Kampanakis — Sat, 29 May 2010 00:33:05 GMT

You global is "global (Outside_net2) 1 10.0.2.3"

10.0.2.3 is a private ip. It will not be routable for the Internet.

Did you mean to translate to the outside interface ip "global (Outside_net2) 1 interface"?

Also as Federico mentioned make sure you have icmp inspection under the policy map "sh run policy-map".

Re: Pinging through ASA 5510

rpsribeiro — Tue, 01 Jun 2010 15:33:27 GMT

Thank's for the response, i added de inspect icmp without any nchanges and the solution works.