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During operation, a connection will be automatically generated from time to time, without user intervention.
This can also be another computer in the local network, if the ISDN computer is being used as a gateway.
If this doesn't apply, then try testing which daemon wants to build the connection. A (trivial) possibility is to stop all daemons one after the other, until this activity no longer occurs, at which point the bad guy has been found.
isdnctrl verbose 3
.
The ISDN subsystem will then protocol in
/var/log/messages
why a connection was
built each time it occurs.
Examples:
Mar 7 16:48:55 Galois kernel: OPEN: 192.168.102.11 -> 192.168.200.2 TCP, port: 1163 -> 23Explanation: Here you see which computer (
192.168.102.11
, which
in this case is not the ISDN computer) would like to build a connection
to which target address.
The port number (in this case 23
) indicates that a
telnet session initiated the connection.
The port numbers are listed in /etc/services
.
Mar 7 17:01:10 Galois kernel: OPEN: 192.168.102.6 -> 192.168.200.9 TCP, port: 513 -> 1023Explanation: 513 = login
Mar 7 16:57:40 Galois kernel: OPEN: 192.168.102.22 -> 192.168.200.11 TCP, port: 1364 -> 21Explanation: 21 = ftp
Mar 7 17:19:00 Galois kernel: OPEN: 192.168.102.11 -> 192.168.200.2 UDP, port: 1212 -> 37Explanation: 37 = time (
netdate
was started)
OPEN: 194.95.192.145 -> 194.95.192.254 TCP, port: 1242 -> 110Explanation: Netscape was started, and it regularly tries to obtain mail via POP3 (Port 110).
Torsten Römer (dode@muenchen.org) writes:
Then I changed the setting in Options | Mail & News Preferences
from Check for Mail every xx Minutes
to never
.
That solved the problem.
/etc/host.conf
starts with hosts, and then the name server:
order hosts bind multi on
/etc/hosts
.
In particular: the ISDN computer directly connected to yours,
the name server, and your computer's IP address (if it isn't
dynamically assigned).
routed
, instead use static routing.
See also:
Keywords: ISDN, SENDMAIL, DIAL, CONNECTION
Feedback welcome: Send Mail to kfr@suse.de (Please give the following subject: SDB-isdn_dial
)
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