ip_resend aims at solving the problem of timeout related delays on demand-dial ppp links. Users frequently suffer from this if the ppp link uses dynamic IP-address assignment. These problems are, e.g., caused by the loss of the first DNS-lookup packet which triggered the demand-dialling.
ip_resend is implemented entirely in user space (no kernel patches required!). It should work with any Linux 2.2.x and 2.4.x kernel. It should work with isdn_ppp as well as async ppp.
The EUROFile protocol is a file transfer protocol frequently used via the ISDN. More info about the Linux-implementation HERE.
I am the current maintainer of the Linux X.25 protocol stack. If you use or want to use the protocol stack, have a look here.
In particular, there is a kind of mini FAQ. Patches to allow linux-x25 being used with the local loopback network interface are in loopback
There is currently work in progress to allow IP and PPP tunneling on top of linux-x25. Please have a look at the sk_tunnel directory. For an overview, please have a look at the extended abstract of a talk given at the Linux Kongress 2000. You can also download tarballs containing LaTeX source and PostScript files of the extended abstract and the slides.
I recently tried to connect two Linux machines via GSM and ISDN: The mobile computer was an Apple iBook (running Linux), which was attached to a Motorola Timeport 260 mobile GSM phone via an ATEN USB-serial adapter. The (ordinary) stationary (Linux) PC was attached to the ISDN via isdn4linux. This turned out to involve several non-trivial subtasks. The related experience is shared in this article. The effort resulted in two kernel patches:
Background information and rationale about the patches is also contained in the above mentioned article:
Have a lot of fun
Henner
eis (-: :-) baty.hanse.de