Firewall Security Level Services Table | Actiontec electronic GT701

Firewall Security	F
Firewall Security
Level Services Table

The following information is related to the Firewall options (High, Medium, and Low) section in the “Using Advanced Setup” chapter of this manual (see page 33). The types of services and their respective ports are listed in the two right-hand columns: the “In” column details whether a particular service can be accessed by a user outside of the network; and the “Out” column details whether a computer on the Modem’s network can access a particular incoming service.

For example, in the “High Security Level” section below, the http service uses port 80. Since no is listed in the In column, a user outside the Modem’s network cannot access a computer on the network via the http service; in this case, no computers on the network can be used as a Web server (i.e., to host a Web site accessible to outside users). However, since yes is listed in the Out column, all computers on the Modem’s network can access the Internet via the http port.

If Basic Security is selected in the “Firewall” screen, firewall filtering is based on the basic NAT firewall.

High Security Level

Service	Port	In	Out
http	80	no	yes
dns	53	no	yes
ftp	21	no	no
telnet	23	no	no
smtp	25	yes	yes
pop3	110	yes	yes
nntp	119	no	no
real audio/video	7070	no	no
icmp	n/a	no	yes
H.323	1720	no	no
T.120	1503	no	no
SSH	22	no	no
imap	163	yes	yes
https	443	yes	yes
secure imap	983	yes	yes
secur pop3	885	yes	yes

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Actiontec electronic GT701 user manual Firewall Security Level Services Table, High Security Level

Contents

DSL Modem Table of Contents Glossary Firewall Security Level Services Table Setting Up Static IP on the ComputerSpecifications Non-Windows System Setup Package Contents Introduction1 Features Minimum System Requirements Getting to Know the Modem Internet Light Power LightDSL Light Ethernet Light USB Port Phone PortPhone port is used to connect the Modem to a phone jack Ethernet Port Power Port On/Off SwitchReset Button Power port is used to connect the Power cord to the Modem Connecting a Computer to the Modem Setting Up ModemConnecting Via Ethernet Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Installing Phone Filters Remove the phone filters from the clear bag. Click Next Setting Up the Modem USB Click Next Next, go to Setting Up the DSL Connection on the next Setting Up the DSL Connection Setting Up the Modem Installation Buddy checks the configuration of the Modem Modem is successfully configured and ready for use Performing a Basic Setup Basic SetupPage Performing a Basic Setup Changing the Admin User Name and Password Click Save and Restart at the bottom of the screen Accessing Advanced Setup Using Advanced SetupTo access the Advanced Settings configuration screens WAN IP Address Transparent Bridging PPP Auto Connect Encapsulation PPPoA only Specify a Static IP Address LAN IP Address Dhcp Server Ending IP Address Beginning IP AddressDNS Dynamic or Static Services Blocking DNS Server Website Blocking Remote Management Port Forwarding Using Advanced Setup DMZ Hosting Firewall Dynamic Routing NAT Network Address Translation Static Routing Viewing Modem’s Settings StatusPage Routing Table WAN Status LAN Status Active User List Using Utilities Web Activity Log DSL Settings Restore Default Settings Upgrade Firmware This page left intentionally blank Cannot Use the Internet TroubleshootingTroubleshooting Physical Connections Which protocols does the Modem support? Frequently Asked QuestionsConnection to the Internet Which connection speeds does the Modem support? How do I find out which IP address my computer is using? Is the Modem flash-upgradeable? How do I do it?What is the valid IP range I can use for my home network? Will my Xbox work with the Modem? Yes, if the application is designed to run over a network How many computers can be connected through the Modem? What is the default username for the Modem?What is NAT and how does it protect my network? Does the Modem function as a firewall? This page left intentionally blank Reference Locating Computer Information Locating Windows Operating System Files Appendix a Reference Click Search Setting Up Static IP On the Computer Windows 98 SEPage 192.168.0.2 Windows Me Enter the following address in the Subnet mask text box Appendix B Setting Up Static IP on the Computer 192.168.0.2 Windows Page Appendix B Setting Up Static IP on the Computer 192.168.0.2 Windows XP Page Appendix B Setting Up Static IP on the Computer 192.168.0.2 Comparing DSL Service with a Dial-Up Modem Computer Security Computer Security Modem SecurityWeb Browsers Electronic Security This page left intentionally blank Specifications D General Power, DSL, Internet, Ethernet, USB LED IndicatorsEnvironmental Access Point GlossaryPage Ssid This page left intentionally blank Firewall Security Level Services Table High Security Level Medium Security Level Low Security Level Service Acronym Definitions Basic Security Level 323 Real audio/videoIcmp 120 Non-Windows G System Setup ClassicPage Appendix G Non-Windows Setup Page Installation Buddy Settings 100 Modifications Regulatory Compliance NoticesClass B Equipment Miscellaneous Legal Notices All other names are the property of their respective owners Limited Warranty 103 104 Limited Warranty 106 Index 108 Index 110 111 112