There's a UDP packet relayer available by anon-ftp:
ftp.wang.com:/pub/fitz/udprelay-0.2.tar.Z
It consists of two parts: 1) a daemon running on a firewall system which
forwards UDP traffic through the firewall as permitted by a configuration
file, and 2) Rsendto/Rrecvfrom routines which can be linked with
cooperative client programs to allow them to choose who they contact in the
outside world.
>From the original announcement:
| It allows forwarding between:
|
| 1) specific pairs of internal and external hosts (nice for ntpd),
| 2) any internal host and a specific external host (nice for ntp query clients
| or archie clients that you can't modify the source to), or
| 3) any internal host and any external host (nice for clients which you can
| modify, since it requires replacing calls to sendto and recvfrom with
| Rsendto/Rrecvfrom, in the spirit of socks).
Everyone who received 0.1 from me via e-mail should pick this up, it has
some small security fixes to protect users inside the firewall from other
users inside the firewall - no known bugs will make you vulnerable to
outsiders.
--
Tom Fitzgerald Wang Labs, Lowell MA, USA fitz @
wang .
com 1-508-967-5278
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