RAD Data comm BLW-04EX User Manual

Page 24

BLW-04EX

Access Control

Using thi s option all ows you to specify different privileges for the cl ient

PCs.

The WAN interface should have a fixed IP address to properly utilize this

functi on. For example, if you set Type/Public Port to TCP/80 (HTTP or

web) and the Privat e IP/Port to 192.168.1.2/8080, then all HTTP requests

from o ut si de users wil l be t ransferred t o port 80 80 on 192. 168 .1. 2.

Therefore, by j ust ent ering the IP Address provided by t he ISP, Internet

users can access the service you provide at the internal address and port to

which the BLW-04EX redirects them.

Some of the more common TCP service ports include:

HTTP: 80, FTP: 21, Telnet: 23 and POP3: 110.

Security Settings Firewall

The firewall does not significantly affect system performance, so we advise

enabli ng i t to protect your network us ers. Select “Enable” an d cli ck the

“APPLY” button to open the Firewall submenus.

The B LW- 0 4 E X ’s firewal l can provide the access co ntrol of co nnected

cl ient PCs, block common hack er at tacks , including IP Spoofing, Land

Att ack, Pi ng of Death, IP wit h zero lengt h, Smurf Att ack , UDP p ort

loo pback , Sno rk At tack, TC P nul l scan, and TC P SYN fl oodi ng. The

firewall does not si gnificant ly affect s ystem performan ce, so we advise

leaving it enabled to protect your network users.

Note:

Wh en y ou select t he “Enabl e” radio b utt on of th e “Enable or di sable

Firewall module function” field, be sure to press the “APPLY” button.