ASA 5506 routing between VLans

[Jack-ITP]

We have an ASA-5506 with 3 interfaces active - 1 outside pointed to the public IP range, 1 inside pointed to the primary internal network (10.1.1.1) and 1 inside2 pointed to a secondary internal domain / network (10.10.10.1). There are static routes and access rules for the public to primary internal network (smtp, web, etc), the secondary internal network has outside (internet) access only. Is it possible to route traffic between the internal interfaces (10.1.1.1 and 10.10.10.1)? What we're trying to accomplish is allow systems on the 10.10.10.x network to access the mail server on the 10.1.1.1 network (10.1.1.4). The mail server at 10.1.1.4 currently has a static route configured to it's public IP address. Thanks.

[Dennis Mink]

I cant see why that wouldnt be possible.

if your mail server has a default route to for instance your 10.1.1.1 interface on the ASA and your 10.10.10.x networks routes all 10.1.1.x traffic to your ASA, and your ACLs allow traffic between the two then you should be able to access your smtp server using the private address.

[Jack-ITP]

Hi Dennis,

Thanks. Right now our 10.10.10.x network only points to the ASA at 10.10.10.1 for internet access - nothing on it routes 10.1.1.x traffic (see ASA config below), is that where the 10.1.1.x routing needs to originate? Since I only want the 10.10.10.x network to be able to access the mail server at 10.1.1.4 I was trying to figure out an ACL that would allow just that.

!
interface GigabitEthernet1/1
 nameif outside
 security-level 0
 ip address 23.xx.xx.xx 255.255.255.248
!
interface GigabitEthernet1/2
 nameif inside
 security-level 100
 ip address 10.1.1.1 255.255.255.0
!
interface GigabitEthernet1/3
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/4
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/5
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/6
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/7
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/8
nameif Lab
security-level 100
ip address 10.10.10.1 255.255.255.0
!
interface Management1/1
 management-only
 no nameif
 no security-level
 no ip address
!
ftp mode passive
object network obj_any
 subnet 0.0.0.0 0.0.0.0
object network obj-10.1.1.4
 host 10.1.1.4
object network obj-10.1.1.15
 host 10.1.1.15
object network obj-10.1.1.16
 host 10.1.1.16
object network obj-10.1.1.17
 host 10.1.1.17
object service Camera
 service tcp destination eq 8000
object-group service rdp tcp
 port-object eq 3389
access-list outside_access_in extended permit tcp any object obj-10.1.1.4 eq smtp
access-list outside_access_in extended permit tcp any object obj-10.1.1.4 eq www
access-list outside_access_in extended permit tcp any object obj-10.1.1.4 eq https
access-list outside_access_in extended permit tcp any object obj-10.1.1.15 eq www
access-list outside_access_in extended permit tcp any object obj-10.1.1.15 eq https
access-list outside_access_in extended permit tcp any object obj-10.1.1.16 eq 3389
access-list outside_access_in extended permit object Camera any object obj-10.1.1.17
pager lines 24
logging asdm informational
mtu outside 1500
mtu inside 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
!
object network obj_any
 nat (any,outside) dynamic interface
object network obj-10.1.1.4
 nat (any,any) static 23.xx.xx.xx
object network obj-10.1.1.15
 nat (any,any) static 23.xx.xx.xx
object network obj-10.1.1.16
 nat (any,any) static 23.xx.xx.xx
object network obj-10.1.1.17
 nat (any,any) static 23.xx.xx.xx
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 23.xx.xx.xx 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 sctp 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
user-identity default-domain LOCAL
http server enable
http xx.xx.xx.xx 255.255.255.255 outside
http 10.1.1.200 255.255.255.255 inside
no snmp-server location
no snmp-server contact
service sw-reset-button
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
no ssh stricthostkeycheck
ssh timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0

dhcpd auto_config outside
!
dynamic-access-policy-record DfltAccessPolicy
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum client auto
  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
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:da722341256ebdddabc516fd6591e444
: end