fli4l FAQ

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fli4l_FAQ's
General questions
General questions: DSL
Functions of fli4l
Problems with fli4l (only in german)
Portforwarding
...Example file

Portforwarding FAQ

Q: | What is port forwarding?
A: | Port frwarding is a technique which lets a computer wait for establishing of a connection. This computer will forward this connection to other computers. See also: http://www.tsmservices.com/masq/
Q: | Why would I need port forwarding?
A: | Due to the principles of NAT it is under normal circumstances not possible to establish a connection from remote to a computer which is "behind" a router. This will be enabled when port forwarding is used.
Q: | How do I use port forwarding ?
A: | On one hand you will have to install the port forwarding OPT package and additionally you must include a file entry for ports/hosts into file portfw.sh . ATTENTION: You must not use the same ports for several clients!
Q: | How will I get Napster running ?
A: | To do so, you will have to define port forwarding for port 6699 to the client (ex.: 192.168.0.99); see also: http://www.linuxdoc.org/HOWTO/mini/IPMasquerading+Napster-4.html
Q: | I canīt receive any data in ICQ or receive any chats, etc. Whatīs that ?

A:

This is depending to the principles of NAT (see above). You will have to do the following settings in the ICQ client:
preferences:connections:general: Permanent Connection,ICQ will determine IP automatically.
preferences:connections:server: using firewall, not using proxy
preferences:connections:user: not using proxy, use the following ports ( 5010 - 5030 )
In file/script portfw.sh parts 5010-5030 must be forwarded to the client.

Q: | When using DCC Send in IRC I get the message "unable to connect". How can I get DCC running ?

A:

Load over yours base.txt (config.txt to 2.0.1):

    MASQ_MODULE_X='irc'

adapts

    MASQ_MODULE_N =

and places e.g. in mirc "on connect, always get:" on local host and "lookup method " on normal

Q: | I want to operate a web server behing my FLI4L router. What do I have to do ?
A: | You will have to define port forwarding for TCP port 80. See: Sample script
Q: | I want to operate a FTP server behind my FLI4L router. What do I have to do ?
A: | You will have to define port forwarding for TCP port 21. FTP clients shall use passive mode (PASV). See: Sample script
Q: | I want to play "Siedler 3", what must be done ?
A: | You will have to define port forwarding. See: Sample script
Q: | Which ports do I have to forward for tax program "ELSTER" ?

A:

None, but: http://www.elsterformular.de/navi/FAQ/faq.htm
ElsterFormular 2000 will check before sending your data, if there are any new program versions available. It will establish a FTP connection for this update. Therefore you will have to open the default FTP port (port 21) in the firewall. You will need ports 8000 / 8001 / 8002 for sending of data. These ports must also be open. The protocol for sending the data is not able to use a proxy. Transmission of data via a proxy server is NOT possible.

Q: | I want to start "Diabolo II" as TCP/IP game and not via Bettlenet. which ports do I have to forward ?
A: | You will have to define port forwarding. See: Sample script
Q: | Which ports must be forwarded for "Unreal Tournament fordwarden" ?
A: | None, UT internet games will work without port forwarding. I you want to establish an UT server you will have to define port forwarding. See: Sample script

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