Date: Fri, 13 Aug 1999 11:48:40 +0300 From: "Andy V. Oleynik" <andyo@prime.net.ua> To: Brian Somers <brian@FreeBSD.org.uk> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: Problem with aliasing unregistered IPs on dialup server. Message-ID: <37B3DBE7.F575EF31@prime.net.ua> References: <199908130803.JAA00498@keep.lan.Awfulhak.org>
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Brian Somers wrote: > > > > No, it knows. I can ping from client ppp server and other hosts residing on > > > > the same ethernet in the same subnet can too . Also I can reach 10.0.0.1 > > client from ppp server > > and these hosts. I understand that while ppp-server has direct route to the > > client and > > other hosts on the ether have this ppp-server as defaultrouter they can > > reach client. > > But hosts from outside this subnet, such as host that is defaultrouter for > > my ppp-server > > doesnt know how to reach 10.0.0.0/24 hosts and they sends their repleys to > > their > > defaultrouters - checked with tcpdump. And my question was why ppp doesnt > > alias the > > packets from unregistered networks. I think ppp have to works like natd in > > this case. > > I.e. every packet from unregistered have to be resent to destination by ppp > > with its own addr. > > And answers have to be retransmitted to the client. Isnt it? What is the > > reason of my failure? > > If you've got the following setup: > > ------- ------------- -------- > 'net---| Box A |-- LAN --| Box B (ppp) |-----| Client | > ------- ------------- -------- > No, but similar: _______ ________ INET------|BOXA|---PPP-leased-multi-line---|BOX B |---PPP-dialup--|Client| ---------- ------------- On the BOXB ppp-server side I have aliasing with: alias enable yes alias unregistered_only yes BOXB have real IP. All the packets from Client go w/o aliasing through the BOXB outside the subnet. > > You need to run the aliasing software on the 'net side of Box A and > make sure that Box A knows how to route to Client via Box B (10/24) > so that it makes everything look like it comes from itself when it > transmits to the 'net and so that it knows what to do with the > replies when it gets them back. > > My suspicion was that Box A didn't know how to route to Client via > Box B. > > If Box A can talk directly to Client, and Box A runs either natd or > ppp -alias on it's 'net interface, there should be no problem. > > > -- > > WBW Andy V. Oleynik (When U work in virtual office > > prime.net.ua's U have good chance to obtain > > system administrator virtual money Ã%o) > > +380442448363 > > -- > Brian <brian@Awfulhak.org> <brian@FreeBSD.org> > <http://www.Awfulhak.org> <brian@OpenBSD.org> > Don't _EVER_ lose your sense of humour ! <brian@FreeBSD.org.uk> -- WBW Andy V. Oleynik (When U work in virtual office prime.net.ua's U have good chance to obtain system administrator virtual money ö%-) +380442448363 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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