Cisco ASA 5505 - Manual (Page 580)

29-26
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 29 Information About NAT
DNS and NAT
a static rule between the inside and DMZ, then you also need to enable DNS reply modification on this
rule. The DNS reply will then be modified two times.In this case, the ASA again translates the address
inside the DNS reply to 192.168.1.10 according to the static rule between inside and DMZ.
Figure 29-23 DNS Reply Modification, DNS Server, Host, and Server on Separate Networks
DNS Server
Outside
Inside
User
1
2
3
5
6
DNS Reply Modification 1
209.165.201.10 10.1.3.14
7
Translation
10.1.3.14
4
DNS Reply Modification 2
10.1.3.14
DNS Reply
209.165.201.10
DNS Reply
DNS Query
ftp.cisco.com?
FTP Request
ASA
ftp.cisco.com
10.1.3.14
Static Translation 1
on Outside to:
209.165.201.10
Static Translation 2
on Inside to:
192.168.1.10
192.168.1.10
192.168.1.10
192.168.1.10
192.168.1.10
DMZ