07-18-2012 09:54 PM - edited 03-11-2019 04:32 PM
I want to allow ICMP traffic on ASA 5510 from LAN interface to DMZ. I've permit any traffic and added ICMP to the inspestion list also but still there is problem. Belos is the configuration. The image is asa822-k8.bin
:
ASA Version 8.2(2)
!
hostname fw-01
names
!
interface Ethernet0/0
nameif LAN
security-level 50
ip address 172.20.4.2 255.255.255.252
!
interface Ethernet0/1
nameif DMZ
security-level 100
ip address 172.20.4.65 255.255.255.252
!
interface Ethernet0/2
no nameif
no security-level
no ip address
!
interface Ethernet0/3
no nameif
no security-level
no ip address
!
interface Management0/0
nameif management
security-level 100
ip address 172.20.1.220 255.255.255.0
management-only
!
boot system disk0:/asa822-k8.bin
ftp mode passive
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
access-list DMZ-->LAN extended permit ip any any
access-list DMZ-->LAN extended permit icmp any any
access-list LAN-->DMZ extended permit ip any any
access-list LAN-->DMZ extended permit icmp any any
pager lines 24
logging enable
logging asdm informational
mtu LAN 1500
mtu DMZ1500
mtu management 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
access-group LAN-->DMZ in interface LAN
access-group DMZ-->LAN out interface LAN
access-group DMZ-->LAN in interface DMZ
access-group LAN-->DMZ out interface DMZ
route LAN 10.0.0.0 255.0.0.0 172.20.4.1 1
route DMZ 172.30.0.0 255.255.255.0 172.20.4.66 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
aaa authentication telnet console LOCAL
http server enable
http 10.0.0.5 255.255.255.255 LAN
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
telnet 0.0.0.0 0.0.0.0 LAN
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
username cisco password 3USUcOPFUiMCO4Jk encrypted
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect icmp
!
service-policy global_policy global
prompt hostname context
call-home
profile CiscoTAC-1
no active
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email callhome@cisco.com
destination transport-method http
subscribe-to-alert-group diagnostic
subscribe-to-alert-group environment
subscribe-to-alert-group inventory periodic monthly
subscribe-to-alert-group configuration periodic monthly
subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:0055841bfefc4136bb22c6cd5b425b9b
: end
07-18-2012 09:58 PM
You would also need to configure:
no nat-control
Then "clear xlate"
Assuming that you wont' be configuring any NAT commands in the future.
07-18-2012 10:02 PM
Hi Bro
Cisco ASA FW is a stateful FW. This means in your rules, you don't have to permit 2-way. Just do the following to permit ICMP and TRACEROUTE, and all will be good :-)
Note: Please change the security-level LAN from 50 to 100 & DMZ from 100 to 50.
nat-control
static (LAN,DMZ) 172.20.4.0 172.20.4.0 netmask 255.255.255.252
static (LAN,DMZ) 10.0.0.0 10.0.0.0 netmask 255.0.0.0
no access-list DMZ-->LAN extended permit ip any any
no access-list LAN-->DMZ extended permit ip any any
no access-list LAN-->DMZ extended permit icmp any any
no access-list DMZ-->LAN extended permit icmp any any
access-list DMZ-->LAN extended permit icmp any any echo
access-list DMZ-->LAN extended permit icmp any any echo-reply
access-list DMZ-->LAN extended permit icmp any any time-exceeded
access-list DMZ-->LAN extended permit icmp any any unreachable
access-list DMZ-->LAN extended permit udp any any range 33434 33464
access-list DMZ-->LAN deny ip any any log
access-list LAN-->DMZ extended permit icmp any any echo
access-list LAN-->DMZ extended permit icmp any any echo-reply
access-list LAN-->DMZ extended permit icmp any any time-exceeded
access-list LAN-->DMZ extended permit icmp any any unreachable
access-list LAN-->DMZ extended permit udp any any range 33434 33464
access-list LAN-->DMZ deny ip any any log
no access-group DMZ-->LAN out interface LAN
no access-group LAN-->DMZ out interface DMZ
access-group LAN-->DMZ in interface LAN
access-group DMZ-->LAN in interface DMZ
policy-map global_policy
class inspection_default
inspect icmp error
inspect icmp
class class-default
set connection decrement-ttl
Note: Provided your workstations have the correct default gateway set in LAN and DMZ.
07-18-2012 10:14 PM
Hi Jeniffer,
I need NAT in future. Actually I started to configure this firewall but in first stage I faced this issue and that's why I permitted anything in two direction.
07-18-2012 10:19 PM
In that case, pls configure the following instead:
static (DMZ,LAN) 172.30.0.0 172.30.0.0 netmask 255.255.255.0
static (DMZ,LAN) 172.20.4.64 172.20.4.64 netmask 255.255.255.252
Then "clear xlate" after the changes.
07-18-2012 11:11 PM
Problem still exist. I have tested it on ASA5520 and there is no problem on that. Is there diffrence between them in rules?
07-18-2012 11:58 PM
No, there is no difference at all between 5520 and 5510 as far as software and configuration is concern, they should behave in exactly the same way.
Are you trying to ping the host or interface of the ASA?
Just FYI, you can't ping cross interface, ie: from a host on LAN you can't ping ASA DMZ interface and vice versa. You can only ping through the ASA, ie: from host on LAN towards host on DMZ and vice versa.
Please advise what you are trying to ping to and from, and also run "debug icmp trace" to see if the ASA is receiving and replying to the ICMP packets.
07-19-2012 12:19 AM
I want to ping through ASA. From host on LAN towards host on DMZ. Debug icmp shows that packet is coming from LAN interface to DMZ, but no reply is sent back.
07-19-2012 12:26 AM
Can you please advise what ip address you are trying to ping from and to?
Also does the DMZ host and/or 172.20.4.66 device knows to route back towards the ASA DMZ Interface IP for access towards LAN host?
Can you ping between the 172.20.4.66 and 172.20.4.1 devices through the ASA?
07-19-2012 05:25 AM
Hi i am sending topology and running config ,i hope it will help you.
i am able to recieve icmp packet from lan to dmz and dmz to lan
!
interface GigabitEthernet0
nameif management
security-level 100
ip address 10.1.1.1 255.0.0.0
!
interface GigabitEthernet1
nameif outside
security-level 0
ip address 20.1.1.1 255.0.0.0
!
interface GigabitEthernet2
nameif LAN
security-level 50
ip address 172.20.4.2 255.255.255.252
!
interface GigabitEthernet3
nameif DMZ
security-level 100
ip address 172.20.4.65 255.255.255.252
!
interface GigabitEthernet4
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet5
shutdown
no nameif
no security-level
no ip address
!
ftp mode passive
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
access-list LAN_access_in extended permit icmp any any
access-list LAN_access_out extended permit ip any any
access-list DMZ_access_in extended permit ip any any
access-list DMZ_access_out extended permit ip any any
pager lines 24
mtu management 1500
mtu outside 1500
mtu LAN 1500
mtu DMZ 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
access-group LAN_access_in in interface LAN
access-group LAN_access_out out interface LAN
access-group DMZ_access_in in interface DMZ
access-group DMZ_access_out out interface DMZ
route LAN 173.1.0.0 255.255.0.0 172.20.4.1 1
route DMZ 174.1.0.0 255.255.0.0 172.20.4.66 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable
http 10.1.1.2 255.255.255.255 management
no snmp-server location
no snmp-server contact
crl configure
07-19-2012 06:03 AM
and boss there is also another way to do this
you can create a police map or edit default policy map
policy-map global-policy
class global-class
inspect dns
inspect esmtp
inspect ftp
inspect h323 h225
inspect h323 ras
inspect ip-options
inspect netbios
inspect rsh
inspect rtsp
inspect sip
inspect skinny
inspect sqlnet
inspect sunrpc
inspect tftp
inspect xdmcp
inspect icmp
inspect icmp error
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide