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Hi all,
i try to setup a small network, and i have this problem...
The network is a private class C, 192.168.0.0/24 and connected
to the Internet through ISDN Dialup...
I use a ISDN Card in a GNU\Linux Box to do the
Firewalling/Routing. All
is working fine except that i can't make the automatic hangup to
work...=20
So i try to investigate and find that, even when i have done the
following :
A)
IPTABLES -P INPUT DROP
IPTABLES -P OUTPUT DROP
IPTABLES -P FORWARD DROP
B)
connect to ISP and get the
local IP address xxx.xxx.xxx.10
remote IP address yyy.yyy.yyy.4
C)
run tcpdump on ISDN interface=20
tcpdump -i ippp0
Result
i see traffic between remote IP Address (not local IP address)
and PIM-ROUTERS.MCAST.NET and ALL-SYSTEMS.MCAST.NET
and the connection is remaining open ...
Is this normal ? Does anyone know if this kind of traffic=20
prevent the isdn4linux to hangup? And if it is how do i block it?
Dimitris
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<DIV> </DIV>
<DIV>Hi all,</DIV>
<DIV> </DIV>
<DIV> i try to setup a small network, and i have this=20
problem...</DIV>
<DIV> </DIV>
<DIV> The network is a private class C, 192.168.0.0/24 =
and=20
connected<BR>to the Internet through ISDN Dialup...</DIV>
<DIV> </DIV>
<DIV> I use a ISDN Card in a GNU\Linux Box to do=20
the<BR>Firewalling/Routing. All<BR>is working fine except that i can't =
make the=20
automatic hangup to<BR>work... <BR>So i try to investigate and find =
that, even=20
when i have done the<BR>following :</DIV>
<DIV> </DIV>
<DIV>A)<BR> IPTABLES -P INPUT =
DROP<BR> =20
IPTABLES -P OUTPUT DROP<BR> IPTABLES -P FORWARD =
DROP</DIV>
<DIV> </DIV>
<DIV>B)<BR>connect to ISP and get the</DIV>
<DIV> </DIV>
<DIV> local IP address =
xxx.xxx.xxx.10<BR> =20
remote IP address yyy.yyy.yyy.4</DIV>
<DIV> </DIV>
<DIV>C)<BR>run tcpdump on ISDN interface </DIV>
<DIV> </DIV>
<DIV> tcpdump -i ippp0</DIV>
<DIV> </DIV>
<DIV><BR>Result</DIV>
<DIV> </DIV>
<DIV>i see traffic between remote IP Address (not local IP =
address)<BR>and=20
PIM-ROUTERS.MCAST.NET and ALL-SYSTEMS.MCAST.NET<BR>and the connection is =
remaining open ...</DIV>
<DIV> </DIV>
<DIV> Is this normal ? Does anyone know if this kind =
of=20
traffic <BR>prevent the isdn4linux to hangup? And if it is how do i =
block=20
it?</DIV>
<DIV> </DIV>
<DIV>Dimitris</DIV>
<DIV> </DIV>
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<DIV> </DIV>
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