3Com OfficeConnect 3C855 User Manual

Also see for OfficeConnect 3C855: Using Setting up Installation guide Installation guide Frequently asked questions

Contents

3Com OfficeConnect 3C855 User Manual Manual pdf 46 page image

46 CHAPTER 5: GATEWAY CONFIGURATIONSecuritySelect Security to display the Advanced Settings screen. (Figure 43)Figure 43 Security ScreenThe Internet connects millions of computer users throughout the world. The vastmajority of the computer users on the Internet are friendly and have no intentionof breaking into, stealing from, or damaging your network. However, there arepeople out there who may try to break into your network.Allow PING from the Internet PING is a utility, which is used to determinewhether a device is active at the specified IP address. PING is normally used to testthe physical connection between two devices, to ensure that everything is workingcorrectly.By default the Gateway has PING disabled in order to make the device moredifficult to find on the Internet and less prone to attack.This feature is enabled by clicking on the check box so that a tick can be seen andthen pressing the Apply button.3Com recommends that you leave this disabled.Disable Firewall The Gateway contains a firewall that detects attack patternsused by hackers on the Internet and once detected will block their access to yournetwork. When an attack is detected a log entry will be generated and the AlertLED will be lit for 2 seconds. The firewall will block Internet access to all unusedports.The Firewall is disabled by clicking on the check box so that a tick can be seen andthen pressing the Apply button.3Com recommends that you leave this enabled.