It is the only software that features HTTP, NAT, SOCKS 4/5 server, DNS server, Telnet, FTP, POP3 and SMTP email, RealAudio, Port Mapping, VPN(PPTP and IPSec), DHCP server and Dial-Up remote control together yet with sufficient simplicity for ALL Windows platform. With the NAT technology, there is virtually no setup requirements for most of Internet software.

Comtun can be used in your home, small business, even in an enterprise company. After you install and start running Comtun from one of your computers which connects direct to the Internet , all other computers will share the same connection by TCP/IP, thus your computer becomes a gateway between the Internet and your local network. Since the gateway machine acts as a firewall by only opening a few well-known ports, no other users on Internet can access your LAN, thus Comtun protects you from the attack of Internet hackers. You don't have to use this gateway exclusively for Comtun, you can run other software applications on this host because all the connection traffics are in the background.

Comtun supports DNS request routing for your local network. It is very likely that your ISP (Internet Service provider) has provided DNS (Domain Name Service) to you, so that an alpha-numeric web address (e.g. www.yahoo.com) can be translated to a pure numeric IP address (e.g. 204.71.200.75). This is required by some Internet applications. Comtun automatically routes all those requests to your default DNS server or any other DNS servers Comtun can find (up to three external DNS servers). In most cases, you may let Comtun directly resolve your DNS requests or broadcast them without specifying the DNS server name.

Comtun supports NAT (Network Address Translation). NAT not only eases the configuration of Internet software in the client hosts, it also improves the performance of the Internet sharing.

Minimum System Requirements:

1. Intel 486DX/66 or higher (100% compatable)
2. 24 MB memory
3. Windows 95/98/Me/NT/2000/XP
4. TCP/IP Local Area Network (must install TCP/IP protocol in Windows)
5. Internet connection made directly to the gateway host
6. Require one additional Ethernet network card besides the Ethernet card already used for your internet connection

1. email filtering through POP3 daemon (supports incoming emails)
2. email filtering through SMTP daemon (supports incoming and outgoing emails)
3. supports black/white list, string matching, DNS-based RBL blocklist, blocking executable attachment, Spam Assassin, etc...
4. log POP3 and SMTP emails
5. log firewall blocking packets
6. display log files under the Tools menu in the Manager window

Release 4.5a build 1:

1. new HTTP caching module - embedded Apache Web Server 1.3.27
2. add trigger configuration allowing incoming port forwarding in circuit level.
3. support a range of ports in the trigger configuration.
4. add DHCP configuration wizard
5. add an icon in the system tray area (status area in the destop screen) for the service engine.
6. add SOCKS 4/5 authentication
7. allow remote login from the Internet
8. check client ip addresses from the About Comtun window
9. fix some minor problems. (e.g. accessing an internal web server from local network - reverse port forwarding)

Release 4.00/4.00a build 10:

1. fix HTTP cache module caching file problem (saving to the disk) (Plus verson only).
2. add a firewall rule to allow email server running behind the firewall
3. fix a minor problem with the OK button in the main window to save the configuration

Release 4.00a build 9:

1. fix a problem with receiving Set-Cookie http response header in the HTTP cache module (affecting www.hotmail.com, mail.yahoo.com login)

Release 4.00a build 8:

1. support Apache v1.3.24 (see Apache Home)
2. list common banner words for the banner blocking in the HTTP cache daemon
3. minor cosmetic fix (User Group Tab display)

Release 4.00/4.00a build 7:

1. fix a problem with xDSL connection in the NAT driver

Release 4.00a build 6:

1. activate Apache Web Server to support automatic proxy configuration through a proxy.pac file located in the Comtun proxy server.

Release v4.00/4.00a build 5:

1. fix a bug with CacheSize directive with the Plus version. The unit should be MB not KB.
2. including completed help file.

Release v4.00/4.00a build 4:

1. add ARP support for local packet routing (useful when used as an intermediate NAT router)
2. add a PDF format help file into the software package

Release v4.00/4.00a build 2:

1. fix a Win9x installation error message

Release v4.00/4.00a build 1:

1. stealth firewall configuration (circuit level)
2. firewall rule timing control
3. remote management
4. user management
5. HTTP caching (plus version)
6. HTTP authentication (plus version)
7. HTTP access restriction (plus version)
8. HTTP banner blocking (plus version)
9. HTTP proxy cascading (plus version)

Release v3.08/3.08a build 3:

1. support MS Netmeeting 3.01 ( you can call-out on any client host. However, you may need to specify the destination IP address in the Netmeeting. You should exchange your IP address information with your party in the MSN text messages. Netmeeting running on the gateway itself should be ok. )
2. flexible and better dialing control(maintain a connection or restrict a connection)
3. indication of connection status at the status bar
4. individually enable/disable PPTP VPN, IPSEC VPN, Game Zone, etc...
5. change the splash window

Release v3.06/3.06a build 4:

1. completely support Windows Millennium
2. support IPSec VPN clients(v3.06a and above, tested with Nortel Extranet Access Client v02_62.33).
3. improve the routing performance (NAT) by at least 20% (build 1 and above).
4. fix a driver compatability problem with Windows 2000 SP2
5. fix a problem with outbound gateway MAC address auto-detection.
6. add an uninstallation icon into the program folder

Release v3.05/3.05a build 1:

1. partially support Windows Millennium (except NAT for dial-up networking).
2. improve the setup wizard.
3. save the manager window position and the size when exiting.
4. minor bug fixing

Release v3.04/v3.04a build 1:

1. support Windows 2000(all version) .

Release v3.03a build 1 :

1. add VPN (MS PPTP) support. You can run MS VPN client from behind Comsocks proxy server.

Release v3.02 build 1 :

1. fix a minor problem with enabling NAT in some Windows 9x platform

Release v3.01 :

1. Support DialPad
2. Test with a lot of games, including Starcraft, Quake 3, Unreal Tournament, Half-Life
3. Test with Napster
4. Test with pcAnywhere host and client
5. Test with MS Chat
6. Test with Yahoo Chat
7. Test with ICQ2000
8. Test with RealPlayer 8
9. Add buffer congestion control
10. Add "Any IP" port mapping

Release v3.00 :

1. NAT (Network Address Translator)
2. Reverse DNS (PTR)
3. Configuration Wizard
4. Allow Ping to the Internet

Release v2.65 build 6:

1. Windows NT and 95/98 Service
2. Keep Dialup Connection Alive
3. Improve Logging Format
4. Maximum Simultaneous Connections
5. Resizable Property Page
6. DNS Caching (reduce DNS response time>
7. DHCP Server (only available in the Plus version v2.65a)

Release v2.64:

1. fix some web page loading problems
2. support CERN FTP (Norton LiveUpdate)
3. support FTP server behind the firewall
4. fix a login problem with some FTP server sites.
5. remind enabling the daemon or port mapping service after the configuration
6. fix the license problem with related to run a web server behind the firewall

Release v2.63:

1. auto-disconnect dial-up networking
2. auto-check a newer version
3. fix a UDP port mapping problem
4. fix a bug relating to save daemon and port mapping information on NT
5. revise the help file and add a troubleshooting chapter
6. no need to install RAS in Windows NT if you don't use dial-up networking
7. support HTTP 1.1 proxy
8. fix a bug with a very long URL
9. verify license key once entering and no need to restart ComSocks
10. add a menu item to open the HOSTS file
11. add a option to disable Dial-On-Demand for DNS requests
12. support hotmail account within OutLook Express 5

Version 2.6 New Features

Version 2.5 Features

Version 2.0 Key Features