home *** CD-ROM | disk | FTP | other *** search
-
-
-
- The 'IP-Masquerading' feature ( IP-M ):
-
- In IP packages the IP-masquerading function manipulates
- for each outgoing IP package the sender's IP address and port.
- These manipulations are reset when incoming IP packages are received.
-
-
- When is IP-M useful?
-
- 1.) Your provider has assigned you ONE dynamic or fixed IP address
- but you wish to provide other computers in your LAN with an
- internet access, too.
-
- LAN
-
- 10.1.1.1 +-----------+
- | | Linux |
- +---------------+ +--------------+ |
- | | | | |
- | 10.1.1.254 | +-----------+
- | | |
- ISDN | OS/2 mit +-------+ +------------+
- | ISDNPM | | 10.1.1.2 | W95 |
- ......... | | +--------------+ |
- +---------------+ | | |
- | +------------+
- 132.130.4.5 |
- | +------------+
- | 10.1.1.3 | OS/2 |
- +--------------+ |
- | | |
- | ...... +------------+
- |
-
- The following configurations are required on your ISDNPM machine:
-
- 1.1 Configuration of the Lan interface (TCPCFG.EXE)
-
- 1.2 Make sure the forwarding of IP packages between your LAN
- and the serial interface (sl0) as well as the 'IP FORWARDING'
- function are active. (TCPCFG.EXE)
-
- 1.3 The IP-M function must have been activated in 'isdn.cfg'
-
- [ip]
-
- ...
-
- if_masquerade : 2 // all IP packages will be
- // modified
-
- if_masquerade : 3 // the IP packages of the
- // computer on which ISDNPM is run
- // are not modified.
- // There may be Servers on this
- // computer.
-
- The 'DEFAULT-ROUTE' parameter of the computers making up the LAN
- must indicate to the OS/2 computer (10.1.1.254)
-
-
- 1.4 If the IP address of your provider is assigned during a
- login procedure this must be made clear to the system.
-
- rc = SETLOCALIP(Channel,LocalIp)
-
-
- 2.) Your provider has assigned you ONE dynamic IP address. This may
- cause problems when the connection is set up with 'AUTODIAL'
- (i.e. the IP connection is not achieved immediately)
- IP-M helps you to get around this problem.
-
- 2.1 When configuring you ISDNPM pretend to have a fixed IP address
- (NO 'IfconfigFile' in isdnuser.cfg and NO interface configuration
- in TONLINE.FNC)
-
- 2.2 Activate IP-M in 'isdn.cfg'
-
- [ip]
-
- ...
-
- if_masquerade : 2 // all IP packages will be
- // modified
-
- What IP-M cannot do:
-
- It is NOT possible to establish any connections to the PCs of the LAN
- from outside (from the internet).
- When ISDNPM is installed on a PC this machine may NOT be used as a
- server (for FTPD...).
-
-