> I´ve tried to monitoring a syncppp link over isdn. I can see IP packets, but
> sometimes there are strange IP packets. For tcpdump and libpcap there is a
> patch which solve this problems. I´ve tried to use the patched libpcap with
> ethereal. It compiles clean, but when I capture on someone interface, the
> prog freeze :(.
Does the machine have any non-ISDN network interfaces?
If so, what happens if you capture on them?
If Ethereal freezes when that happens, the problem is probably that
"libpcap" *also* needs a patch to support on Linux a feature on which
Ethereal depends in order *not* to freeze; the patch can be found at
http://ethereal.zing.org/~gerald/libpcap-0.4-guy-gerald.patch
although if you have a "libpcap" with Alexey Kuznetsov's patches, a
different patch is needed (if the above patch doesn't apply, it may be
because your "libpcap" has Alexey's patches).
BTW, where can those patches be found? The ISDN4Linux FAQ mentions that
they're on "ftp.gwdg.de", but the FAQ entry is two years old, and, at
least right now, that machine is responding neither to pings nor to
attempts to connect by FTP. Are there other places where it can be
found? (The FAQ also mentions that another patch can be found in the
mailing list archives; however, it's a uuencoded patch, and I've never
had much success with uuencoded patches in HTML mailing list archives,
and this time was no different....)
