Port Mapping

Terms in Port Mapping Table

Accessing a Port Mapped Web Server

Tips on Using Port Mapping

Application Interoperability List

Browsers

Mail Clients

Multimedia and Chat Programs

Communication Programs

Games

Miscellaneous

Port Mapping Setup Details

Multimedia and Chat Programs

RealPlayer G2

Mirabilis ICQ

Microsoft Netmeeting v2.1

Netscape Conference

White Pine CUSeeMe v3.12

Communication Programs

Symantec pcANYWHERE v8.0

Symantec pcTELECOMMUTE v1.0

Games

Blizzard Diablo

Blizzard StarCraft

Quake II v3.2

Terms in Port Mapping Table

External IP Address

An External IP address, such as 205.214.100.120, is assigned to the router by an ISP or remote server. In most cases, it is a random address.  It could be a fixed IP address depending on what type of account you received from your ISP. A fixed IP account assigns a fixed IP address, and a dynamic IP account assigns address randomly. The external IP address can be found by going to Apex Manager > Status > Show Detail. Once connected to your ISP, the assigned address will be shown at the bottom of the window as your "ISDN NAT IP Address". If you have a dynamic IP account, this number will change each time you reconnect. A wild card "0.0.0.0" can be used in this field, and the router will take any IP address it is assigned. In the examples shown in "Port Mapping Setup Details", "a.b.c.d" is used to represent the External IP address.
 

Internal IP Address

An Internal IP Address, such as 192.168.1.2, is the computer's IP address on the LAN where you are hosting the server or running special applications. In the examples shown in "Port Mapping Setup Details", "w.x.y.z" is used to represent Internal IP address.
 

External and Internal TCP/IP Port

This is the port number used by the server or application. For example, http uses port 80, and ftp uses 21. If "Any" is selected, any port can be accessed.
 

Protocol Type

This is the protocol type used by the server or application. It can be TCP or UDP.

Accessing a Port Mapped Web Server

To access a port mapped web site in an IP Master LAN, you need to enter "http://external IP address" (where the external IP address is a 32 bit numeric address, such as 207.214.100.120) in the address window of the web browser. If the port mapping has been setup correctly, the packets will be directed to the web server.

Tips on Using Port Mapping

Specify a fixed IP address to the computer instead of using dynamic address

Specify a fixed IP address internally for the computer running the port mapped server or application(s), and then you will only need to setup a port map once. Otherwise, it will have to be modified each time the computer obtains a different IP address from the router. If the router has an IP address/subnet mask of 192.168.1.1/255.255.255.0, then 192.168.1.2/255.255.255.0 can be specified for the computer.

Note:

• Do not forget to assign a Gateway and DNS for the computer that has a fixed IP address. The Gateway should be 192.168.1.1 for the computer based on the above example. You should obtain the DNS information from your ISP.
• Do not forget to reserve the computer's fixed IP address in the Apex router so that the router will not assign the address to another device on the LAN. This can be done by going to Apex Manager > Advanced > LAN Configuration > DHCP IP Address Assignment > Reserved IP Addresses. Highlight the address you would like to reserve and click the arrow button move it to the right. Click Apply, then click Finish.

Obtain a fixed IP account from your ISP

If you obtain a fixed IP account for the NAT client (router), then the router's fixed IP address will always be known. If you use a dynamic IP account then everyone will have to re-acquire your assigned IP address before they will be able to access the port mapping service.

It is also to your advantage to have a fixed IP account when you have a domain name, such as www.yourdomain.com. With a fixed IP address, your ISP will be able to add the IP address and domain name entry into their DNS table.

Multiple services run on a single machine
Multiple services such as Web, FTP, Telnet, or Mail can be run on a single machine. By doing so every associated port has to be mapped to that machine.
 

Multiple services run on different machines
Multiple services can be run on different machines. For example, 192.168.1.2 can run the Web, 192.168.1.3 can run the FTP, and 192.168.1.4 can run the Mail server. By doing so each machine must have an associated port map based on the type of service it is running.
 

Multiple services with same port number
The same service with the same port number cannot be run on different machines. For example, if 192.168.1.2 has been mapped to port 80 (Web), another machine such as 192.168.1.3 cannot also be mapped to port 80. However, specifying a different port for the service, such as 443 for the Web, on a different machine is allowed.

Application Interoperability List

The following applications have been tested and are supported by Arescom Apex1100/Netlinker routers in both IP Master and Static IP mode. Port Mapping settings may be required and some restrictions may be applied for certain applications labeled with "*" in IP Master mode depending on the network settings. Please refer to section "Port Mapping Setup Details" for detail information.

This list is by no means inclusive of all applications that the Arescom Apex1100/Netlinker supports. Please look for periodic updates.

Browsers

• Internet Explorer (Microsoft)
• Netscape Communicator (Netscape)
• Netscape Navigator (Netscape)

Mail Clients

• Outlook Express (Microsoft)
• Outlook 97 (Microsoft)
• Netscape Mail (Netscape)
• Lotus Notes (Lotus)

Multimedia and Chat Programs

• RealPlayer G2 (RealNetworks, Inc.)
• ICQ* (Mirabilis)
• NetMeeting* (Microsoft)
• Cu-SeeMe 3.1* (White Pine)
• Microsoft Chat
• Yahoo Pager
• Yahoo Chat
• Netscape Conference

Communication Programs

• Point to Point Tunneling Protocol (PPTP) and Virtual Private Network (VPN) (Microsoft)
• pcANYWHERE* (Symantec)
• pcTELECOMMUTE* (Symantec)

Games

• Diablo* (Blizzard Entertainment)
• StarCarft* (Blizzard Entertainment)
• Quake (ID Software)
• Quake II* (ID Software)
• Heavy Gear II (Activision)

Miscellaneous

• Host* and Access FTP Server
• Host* and Access HTTP Web Server
• Host* and Access SMTP Mail Server
• Remote Telnet*
• TFTP

Note:

• Some applications use dynamic port or complicated IP address and port translation schemes. Arescom's IP Master NAT allows most applications to work when using a single workstation on the LAN. Due to the limitations of NAT, the application might not work properly if two or more workstations are using the same application at the same time. However, every application should work fine in Static IP mode when simultaneously run on multiple workstations.
• In addition to the well known services like FTP or Web, some applications use self defined ports. Please contact the manufacturer of the application to obtain the Protocol (TCP/UDP) and ports information.

Port Mapping Setup Details

Multimedia and Chat Programs

RealPlayer G2

• NAT to RealPlayer Server: No Port Mapping setup is required.

Note:

• RealPlayer has to be configured.
• In RealPlayer, go to Options > Preferences > Proxy > HTTP Options.  Select "No HTTP Proxy".

  Mirabilis ICQ

• NAT to Static: No Port Mapping setup is required.
• Static to NAT and NAT to NAT: One port map required.

Microsoft Netmeeting v2.1

• NAT to Static: Two port maps required.

Known Issues

• Static to NAT and NAT to NAT does not work.
• When an NAT client accesses a Static host, then the NAT client cannot receive video or audio.
• NAT client cannot place a call directly to a user in the directory. The call must be made by entering the Static host IP address.

  Netscape Conference

• NAT to Static: No port map required.

Known Issues

• Static to NAT and NAT to NAT does not work.
• When an NAT client accesses a Static host, then the NAT client cannot receive audio.

Note:

• NAT client can place call directly to a user in the directory by using Web Phonebook.

  White Pine CU-SeeMe v3.12

• NAT to Static, Static to NAT, and NAT to NAT: Three port maps required.

Note:

• CU-SeeMe uses Multicast to host conferences, which is not supported by most network cards, modems, and routers.
• Multicast Conference is not supported in both Static IP and IP Master mode.
• Regular Internet conference (such as Rio Internet TV Conference on CU-SeeMe's Conference Directory) is supported.
• NAT client can receive audio and video.

  Communication Programs

  Symantec pcANYWHERE v8.0

• NAT to Static: No port maps required.
• Static to NAT and NAT to NAT: Three port maps required.

Note:

• NAT to Static allows multiple NAT clients on the same LAN to access different Static servers on the Internet.

  Symantec pcTELECOMMUTE v1.0

• NAT to Static: No port maps required.
• Static to NAT and NAT to NAT: Four port maps required.

Note:

• NAT to Static allows multiple NAT clients on the same LAN to access different Static servers on the Internet.

  Games

  Blizzard Diablo

NAT to Static, Static to NAT, and NAT to NAT: One port map required.

Blizzard StarCraft

NAT to Static, Static to NAT, and NAT to NAT: One port map required.

Quake II v3.2

• NAT to Static: No port maps required.
• Static to NAT and NAT to NAT: One port map required.

Note:

• Port Mapping is only needed when hosting a game server on an NAT client.
• Multiple NAT users are allowed on the same LAN to join game servers (can be the same server) on the Internet.  No port mapping setup is required.
• An NAT machine can host a game server.  Machines on the same NAT LAN can join the server, while machines outside the LAN can join the game as well.  The above port mapping setup is required.