03-01-2004 03:13 AM - edited 03-02-2019 01:56 PM
hi,
we have 4 internetsurfstations in 4 different locations.
these stations are win95 or win98 pc with a 7xx router and a isdn connection.
we saw, that these pc´s make a connection to the internet in times where none has physical access to the stations.
it seems that a win95/98 service sends an ip paket to
the internet - i do not know why ??
this is the reason that we have high isdn costs.
any idea what can cause 95/98 to dial out ???
03-01-2004 03:56 AM
You might have configured broadcast forwarding (ip helper address) for DHCP. This can cause unwanted calls while the windows broadcasts (port 138, 139) are forwarded as well.
On an IOS router you would configure something like:
no ip forward protocol udp 138
to filter these packets. Unfortunamtely I do not know the alternative for the %^&*($ 7xx series.
Still I hope to have given you a hint as where to start searching.
Regards,
Leo
03-01-2004 12:38 PM
95/98 can generate quite a bit of traffic that could cause it to dial out. One thing you can do is "debug dialer packets" to figure out what it is considering to be "interesting" traffic that is causing it to dial out.
Another thing you could do is put in time-based ACL's to only allow dialing out during certain hours...
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