Re: Nameserver activity
Hi Steve,
both problems (nameserver lookups without any user activity and ns lookups when connecting to the mainframe) disappeared after putting the dummy ip addresses for my host(!) for ippp0 and ippp1 into /etc/hosts.
Klaus
Steve George wrote:
> Hi,
>
> If I get this right you are saying that even though you have a route to the IBM network the ISDN line to your ISP is coming up when you make a connection to the IBM network. My guess would be that the client program you are using is using DNS to connect the IBM host. If you are trying to connect to a place via a name then DNS will be called: you can put the host you want in your /etc/hosts file and alter /etc/resolv.conf so that it checks hosts before the resolver will stop this.
>
> As for the DNS calls it has to be something on your network that is trying to get out. I'm guessing you might have looked for things. The only thing I can think of is if the IBM network calls you, if you have tcp_wrappers running and PARANOID in I think it will do a reverse on the incoming IP address to try and stop spoofing.
>
> Steve
>
> On Sat, Jun 26, 1999 at 04:38:38PM +0200, Klaus Pieper wrote:
> > Hi,
> >
> > I user an isdn dialup network with two isdn ppp interfaces for
> > connections to the ISP and to an IBM host on two telephone lines.
> >
> > 1. I get spontaneous nameserver requests (port) without doing anything.
> > 2. When I connect to the IBM host there is a nameserver request (to the
> > ISP) AFTER dialing the number for ippp1 on the other line.
> >
> > There is an independent route to the mainframe.
> >
> > ifconfig ippp0 blabla .. (ISP)
> > route add default ippp0
> >
> > ifconfig ippp1 ... pointopoint 10.18.1.2
> > route add <ibm_host> gw 10.18.1.2 ippp1
> >
> > This is repeated in the ip-up-script for the real ip address.
> >
> > Klaus
> >
> >
> > --
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> >
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