Perle Systems IOLINK-520 - Manual (Page 69)

Applications
IOLINK-520 & IOLINK-PRO Installation & Applications Guide — 2.49
First the firewall on the ISP connection (remote site 1) of the WAN is set-up. The firewall
option is set to “inbound” to have this WAN firewall filter traffic from the ISP to the
IOLINK router while allowing unrestricted access out to the Internet.
Firewall
Location: Main
! Configuration
! Applications Set-up
! Firewall Set-up
!
WAN Firewall Set-up
! enter ID# 1 for ISP remote site
! Firewall
! inbound
The firewall on the Internet connection is set-up to protect the entire corporate
network, including the branch office, from unauthorized traffic.
Then the entries are made in the “Designated Servers” menu to allow Internet access to the
FTP and Web servers on the corporate network.
FTP & WWW Designated Servers
Location: Main
! Configuration
! Applications Set-up
! Firewall Set-up
!
WAN Firewall Set-up
! ID# 1 for ISP remote site
! Designated Servers
! FTP Server
— 195.100.1.12
! WWW (HTTP) Server
— 195.100.1.20
When defining a designated server you will be prompted for the IP
address of that device. Adding an entry to the designated servers list
allows you to quickly setup a firewall entry without having to figure out
TCP port values.
Next, the LAN firewall is set-up to restrict access to the LAN. The firewall option is set to
“outbound” to have the LAN firewall filter traffic from the IOLINK router.
Firewall
Location: Main
! Configuration
! Applications Set-up
! Firewall Set-up
! LAN Firewall Set-up
! Firewall
! Outbound
Note: if this IOLINK-520 has a second LAN interface installed, you will be requested to
select which LAN this firewall entry is to be used with.
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