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Date:      Tue, 17 Jun 1997 17:04:39 +0800 (TSD)
From:      "Victor A. Sudakov" <vas@vas.tomsk.su>
To:        toj@gorilla.net (Tom Jackson)
Cc:        questions@freebsd.org
Subject:   Re: NT4 ISP
Message-ID:  <199706170904.RAA07410@vas.tomsk.su>
In-Reply-To: <19970616183342.11874@peeper.my.domain> from "Tom Jackson" at "Jun 16, 97 06:33:42 pm"

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Tom Jackson wrote:

> Well first I misunderstood that you had alias'd lo0, I thought you had used
> ifconfig for tun0. 

There is no need to use ifconfig for tun0. iijppp does everything by itself.

> Secondly I was going to say that it sounded like a good idea
> to alias lo0 with your hostname but I tried it and it did*not* work with ppp.

What does lo0 have to do with ppp? I think they even do not know about each
other. How exactly did it not work with ppp? I think it would be a good idea
though to take different addresses for lo0 alias and for /etc/ppp/ppp.conf
to avoid confusion. Say, 192.168.1.1 and 192.168.2.1

Please IP experts correct me here.

> As I said before, I ended up with a 'my addr' of 192.168.0.1 and of course the
> ppp session failed.

If you mean the "ifaddr" statement in your /etc/ppp.conf file, try

set ifaddr 192.168.0.1/0

thus allowing iijppp to assign ANY address received from the ISP to your
tun0 interface.

> > > > > I have dynamic assigned address. My /etc/hosts file has only the loopback
> > > > > address, 127.0.0.1, and nothing else (I have no ethernet card). If I use
> > > > > anything there with my hostname, my isp will try to use that address and
> > > > > the connection will fail. 
> > > > 
> > > > Why should he try to use that address? And how is he going to know about it,
> > > > anyway?
> > > > 
> > > 
> > > Well for one reason, that is the default standard everyone starts with. You
> > > only muck it up when you start modifying the file :)
> > 
> > Sorry, I did not understand this phrase. I mean if you assign another IP
> > address to your lo0 interface, the ISP will not know about this and this
> > will cause no problems at all.
> > 
> > > 
> > > > > This is something I wish somebody would clearup.
> > > > 
> > > > I also have a dynamically assigned address. However, I have in my /etc/hosts
> > > > file:
> > > > 
> > > > 127.0.0.1		localhost 
> > > > 192.168.1.1	vas.tomsk.su vas
> > > 
> > > I think maybe you have an ethernet card, yes?
> > 
> > No, I have none.
> > 
> > > 
> > > > 
> > > > And in my /etc/rc.local:
> > > > 
> > > > /sbin/ifconfig lo0 inet 192.168.1.1 alias
> > > > 
> > > 
> > > Everything I've seen posted recommends against using this assignment. I'm
> > 
> > What is the reason of recommending against this assignment? What is wrong
> > with it? Note the "alias" parameter I use. Thus, lo0 has two addresses.
> > 
> > > glad it works for you though.
> > > 
> > > > It works fine, I can ping vas.tomsk.su even if I am offline. It does not
> > > > prevent me from using ppp because 192.168.1.1 is associated with lo0 and has
> > > > nothing to do with tun0.
> > > > 
> > > 
> > > I'm not sure I understand this. I thought the 127 address was the loopback
> > > address.
> > 
> > Certainly. In my case, the lo0 interface has two addresses:
> > 
> > 127.0.0.1	localhost
> > 192.168.1.1	vas.tomsk.su vas
> > 
> > I can ping both 127.0.0.1 and 192.168.1.1


-- 
Victor Sudakov
http://www.tomsk.su/r/persons/vas.htm



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