Hi,
i ran into a problem when trying to install an ASA Security Appliance with AIP-SSM in transparent firewall mode.
Please see the both attachments network-with-asa.pdf and network-without-asa.pdf which will introduce you to the network.
The first picture you should have a look to is network-without-asa.pdf. In this case everythings work fine. All devices are able to connect to the network 10.19.64.x (right router) and to the internet (left router).
Now i plugged in the ASA in transparent firewall mode to sniffer all traffic to the internet (network-with-asa.pdf). I don't understand what now happens:
All devices can connect to the internet, all Ping messages to 10.19.64.x are O.K., but neither TCP nor UDP connections can be established. There is a permit ip any any access-list statement in ASA and the ASA has an IP address in the network 10.119.x.x.
I thought ASA in transparent firewall mode is just like a "stealth device".
BTW: ASA is connected to the correct VLAN on the Layer-3-Switch ;-)
Please see also this configuration of ASA:
ASA Version 7.2(1)
!
firewall transparent
hostname ciscoasa
domain-name xxx.de
enable password xxx
names
!
interface Ethernet0/0
nameif inside
security-level 100
!
interface Ethernet0/1
nameif outside
security-level 0
!
interface Ethernet0/2
shutdown
no nameif
no security-level
!
interface Management0/0
nameif management
security-level 100
ip address 10.19.10.1 255.255.248.0
management-only
!
passwd xxx
ftp mode passive
dns server-group DefaultDNS
domain-name xxx.de
access-list 100 extended permit ip any any
access-list 100 extended permit icmp any any
access-list 101 extended permit ip any any
pager lines 24
logging console debugging
logging asdm informational
logging host management 10.19.10.3
mtu inside 1500
mtu outside 1500
mtu management 1500
ip address 10.119.128.10 255.255.255.0
icmp permit any inside
icmp permit any outside
icmp permit any management
asdm image disk0:/asdm521.bin
no asdm history enable
arp timeout 14400
access-group 100 in interface inside
access-group 100 in interface outside
route management 10.19.8.0 255.255.248.0
route management 0.0.0.0 0.0.0.0 10.119.128.250 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 uauth 0:05:00 absolute
http server enable
http 10.19.0.0 255.255.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
telnet timeout 5
ssh 10.19.0.0 255.255.0.0 management
ssh timeout 5
console timeout 0
!
class-map inspection_default
match default-inspection-traffic
class-map ips
match access-list 101
!
!
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
class ips
ips promiscuous fail-open
!
service-policy global_policy global
prompt hostname context
Cryptochecksum:xxx
: end
ciscoasa#
Can someone tell me what is happening here???
Thanks in advance!!
Regards
Bernd
