Date: Sat, 21 Aug 1999 10:34:40 +0300 From: "Andy V. Oleynik" <andyo@prime.net.ua> To: Brian Somers <brian@Awfulhak.org> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: Problem with ICMP when aliasing enabled? Message-ID: <37BE568F.4EA45BEE@prime.net.ua> References: <199908201448.PAA02932@keep.lan.Awfulhak.org>
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I'll try to clarify situation. Client use M$WinXXX to dialup into FBSD ppp server which provides ppp with aliasing on server side. I didnt especially disable aliasing on dialup modem pool coz I dicided that it didnt matter in the dialup case. Generally aliasing is ajusted in default section and serves the leased mppp link to the base backbone (defaultroute). Thus aliasing propagated on the dialup ppp links too. And dialup clients(real dynamic IPs) say that they have usual tcp traffic but they cant to ping remote hosts but the dialup ppp server. And I can ping clients only from dialup ppp server only but not from another hosts. Though ECHO requests goes through the dialup links w/o any replies. Was I clear? |backbone---------echo requests w/o replies ---------------> | |-------------|Client1 |-------------------------------| ppp dialup server|---echo requests with replies----------> | mppp leased link with |-------------|ClientN | aliasing dialup ppp with propagated aliasing Brian Somers wrote: > > Here is another strangeness but I'm not sure that this > > > > is relevant to aliasing. Well, clients are serviced by > > > > user ppp on dialin side of server providing dynamic > > > > IP distribution per ttyd basis. IPs are real. And everithing > > > > is Ok but ICMP (particularly ECHOREQ/ECHOREP). There is > > > > normal traffik from clients to Inet and wise a versa > > > > on the ppp links. But I can ping and take repley from > > > > clients only from ppp host exactly. When I ping them from > > > > other hosts I take no repleys. But tcpdump shows that > > > > echo-reqs goes from dialup ppp link to the clients PCs. > > > > All other proto's works good. There are no FW's rules > > > > denying incoming ICMP traffik from clients. Any ideas? > > Maybe I don't understand you... this works ok for me - when I dial > the 'net from home I run ppp -alias. A ping from an external machine > to the dialed-up machine works ok... > > > -- > > 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 > > -- > 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 -- 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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