ASA 5505 newbie 1

[robbhan]

Hi,
I can't seem to figure the asa 5505 out.

I want to allow incoming http traffic to a host on a vlan called dmz-office but everything seems to get dropped no matter what kind of firewall rule set i configure. The inside -> outside traffic is working just fine.

The outside interface has a dhcp assigned (for now) on 192.168.10.15.

Please help


This is my config.

ASA Version 8.0(3)
!
hostname x
domain-name x
enable password x
names
!
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address dhcp setroute
!
interface Vlan3
nameif dmz-office
security-level 50
ip address 172.16.3.1 255.255.255.0
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
switchport access vlan 3
!
interface Ethernet0/6
!
interface Ethernet0/7
!
passwd x
ftp mode passive
dns server-group DefaultDNS
domain-name mideye-intra
access-list dmz-office extended permit ip any host 192.168.10.15
access-list dmz-office extended permit tcp any host 172.16.3.4 eq www
pager lines 24
logging enable
logging asdm informational
mtu outside 1500
mtu inside 1500
mtu dmz-office 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-603.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
static (outside,dmz-office) 172.16.3.4 192.168.10.15 netmask 255.255.255.255
access-group dmz-office in interface dmz-office
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
dynamic-access-policy-record DfltAccessPolicy
aaa authentication ssh console LOCAL
aaa authorization command LOCAL
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
no crypto isakmp nat-traversal
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 inside
ssh timeout 30
ssh version 2
console timeout 0
dhcpd auto_config outside
!
dhcpd address 192.168.1.2-192.168.1.254 inside
dhcpd enable inside
!

threat-detection basic-threat
threat-detection statistics access-list
username root password VHthHU93VSOk43i0 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
!
service-policy global_policy global
privilege cmd level 3 mode exec command perfmon
privilege cmd level 3 mode exec command ping
privilege cmd level 3 mode exec command who
privilege cmd level 3 mode exec command logging
privilege cmd level 3 mode exec command failover
privilege show level 5 mode exec command import
privilege show level 5 mode exec command running-config
privilege show level 3 mode exec command reload
privilege show level 3 mode exec command mode
privilege show level 3 mode exec command firewall
privilege show level 3 mode exec command interface
privilege show level 3 mode exec command clock
privilege show level 3 mode exec command dns-hosts
privilege show level 3 mode exec command access-list
privilege show level 3 mode exec command logging
privilege show level 3 mode exec command vlan
privilege show level 3 mode exec command ip
privilege show level 3 mode exec command failover
privilege show level 3 mode exec command asdm
privilege show level 3 mode exec command arp
privilege show level 3 mode exec command route
privilege show level 3 mode exec command ospf
privilege show level 3 mode exec command aaa-server
privilege show level 3 mode exec command aaa
privilege show level 3 mode exec command eigrp
privilege show level 3 mode exec command crypto
privilege show level 3 mode exec command vpn-sessiondb
privilege show level 3 mode exec command ssh
privilege show level 3 mode exec command dhcpd
privilege show level 3 mode exec command vpnclient
privilege show level 3 mode exec command vpn
privilege show level 3 mode exec command blocks
privilege show level 3 mode exec command wccp
privilege show level 3 mode exec command webvpn
privilege show level 3 mode exec command uauth
privilege show level 3 mode exec command compression
privilege show level 3 mode configure command interface
privilege show level 3 mode configure command clock
privilege show level 3 mode configure command access-list
privilege show level 3 mode configure command logging
privilege show level 3 mode configure command ip
privilege show level 3 mode configure command failover
privilege show level 5 mode configure command asdm
privilege show level 3 mode configure command arp
privilege show level 3 mode configure command route
privilege show level 3 mode configure command aaa-server
privilege show level 3 mode configure command aaa
privilege show level 3 mode configure command crypto
privilege show level 3 mode configure command ssh
privilege show level 3 mode configure command dhcpd
privilege show level 5 mode configure command privilege
privilege clear level 3 mode exec command dns-hosts
privilege clear level 3 mode exec command logging
privilege clear level 3 mode exec command arp
privilege clear level 3 mode exec command aaa-server
privilege clear level 3 mode exec command crypto
privilege cmd level 3 mode configure command failover
privilege clear level 3 mode configure command logging
privilege clear level 3 mode configure command arp
privilege clear level 3 mode configure command crypto
privilege clear level 3 mode configure command aaa-server
prompt hostname context
Cryptochecksum:x
: end

 

[bell1996]

robhan -

If you want folks from the "outside" to access your web server (which it appears you do), then you'll need an ACL to allow

http://www into

the DMZ. You'll need to add the following ACL:

access-list outside-acl extended permit tcp any host 192.168.10.15 www

Then apply the ACL to the "outside" interface:

access-group outside-acl in interface outside

You also have you static backwards. Just reverse it. It should read like this:

static (dmz-office,outside) 192.168.10.15 172.16.3.4 netmask 255.255.255.255

Try this and see if it works.

 

[robbhan]

I still can't get it to work. I must be missing something obvious. I'm trying to allow incoming http trafic on the outside interface. But everything gets dropped.

I think the port forwarding is set up correctly that'll do me little good when everything gets drop by the default acl rule.

Why does ASA drop my incoming requests?

my config:
ASA Version 8.0(3)
!
hostname x
domain-name x
enable passwordx encrypted
names
!
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address dhcp setroute
!
interface Vlan3
nameif dmz-office
security-level 50
ip address 172.16.3.1 255.255.255.0
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
switchport access vlan 3
!
interface Ethernet0/6
!
interface Ethernet0/7
!
passwd x
ftp mode passive
dns server-group DefaultDNS
domain-name x
object-group protocol TCPUDP
protocol-object udp
protocol-object tcp
access-list outside_access_in remark test rule
access-list outside_access_in extended permit object-group TCPUDP any host 192.168.10.35 eq www
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
mtu dmz-office 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-603.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
static (outside,inside) tcp 192.168.1.2

http://www 192.168.10.35

http://www netmask

255.255.255.255
access-group outside_access_in in interface outside

 

[bell1996]

robbhan -

Ahhh, I see your problem. Your outside acl reads as:

access-list outside_access_in extended permit object-group TCPUDP any host 192.168.10.35 eq www

Well the destination host address you're using is 192.168.10.35. This is the IP address of the server on the inside. Well, when someone is trying to access your server they use the OUTSIDE IP address of the ASA. Which you don't know ahead of time, because it's DHCP assigned. That's why all packets from the outside are being dropped. You can't permit outside devices to access inside directly (well you could but that's a different story).