EXP Computer ThinConnect4 - Manual (Page 108)

<98> ThinConnect4
7.1 Firewall - IP Filter Table setting
Setup the Firewall - IP Filter Table is optional. ThinConnect4 can function without it. The
firewall function is a packet filtering gateway process. After the firewall is setup properly,
PC resources on LAN will be protected by the IP filtering function that is placed in between
LAN IP frame and WAN (Serial Port) IP frame.
Caution: For this type of IP address setting you should have a good knowledge oft
TCP/IP. Please be very careful in setting up this section because a wrong setup
may cause ThinConnect4 to stop working. Unless it is necessary to change the
settings, we suggest that you to use the default setting on the next page.
Layer3 Filtering Control
Processing protocol is objected filtering control for IP frame only.
Other layer3 protocol (IPX) will be all closed down.
Layer4 Filtering Control
Processing protocol is objected filtering control for ICMP, TCP and UDP.
Other layer4 protocol (EGP, OSPF) will be transparent.
Layer5 Filtering Control
• ICMP Control: No control
• TCP Control: Monitoring port number and flag.
• UDP Control: Monitoring port number.
1. Click the “Firewall - IP Filter Table” button in the “Settings for LAN Port”.
Note: Data in the window is an example for your reference. Please enter your
proper setting to meet with your LAN requirements.