BinTec X3200, User Manual

Page: 284 / 419

284 BinTec Communications AG
Security Mechanisms
7
Reverse NAT is especially interesting for system administrators who want to of-
fer NAT to a WAN partner who cannot do NAT himself. Here, X3200 does not
automatically hide the local network behind the global IP address assigned by
the ISP. To obtain the same amount of security, further configuration is neces-
sary.
You can explicitly allow a NAT interface certain IP connections to a certain in-
ternal host in
IP
➧
N
ETWORK
A
DDRESS
T
RANSLATION
➧
E
DIT
➧
ADD:
Field Meaning
Service Service allowed for connections to the host
defined under Destination. Possible values:
■
ftp
■
telnet
■
smtp
■
domain/udp
■
domain/tcp
■
http
■
nntp
■
user defined: If you do not use any of the
predefined services. Enter the required val-
ues under Protocol and Port to define a
service.