Date: Fri, 13 Aug 1999 11:09:54 +0100 From: Brian Somers <brian@FreeBSD.org.uk> To: "Andy V. Oleynik" <andyo@prime.net.ua> Cc: Brian Somers <brian@FreeBSD.org.uk>, freebsd-isp@FreeBSD.ORG Subject: Re: Problem with aliasing unregistered IPs on dialup server. Message-ID: <199908131009.LAA27283@keep.lan.Awfulhak.org> In-Reply-To: Your message of "Fri, 13 Aug 1999 11:48:40 %2B0300." <37B3DBE7.F575EF31@prime.net.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
You need to run the aliasing software on the external interface - in = your case, either the external BoxB interface or have the client box = run it. Running it on the private interface of Box B doesn't work :-| > Brian Somers wrote: > = > > > > > > No, it knows. I can ping from client ppp server and other hosts res= iding 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 rout= e 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 defaultrou= ter for > > > my ppp-server > > > doesnt know how to reach 10.0.0.0/24 hosts and they sends their rep= leys 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 destinatio= n by ppp > > > with its own addr. > > > And answers have to be retransmitted to the client. Isnt it? What i= s 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--|Cli= ent| > ---------- > ------------- > 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 =C3%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> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199908131009.LAA27283>