Date: Wed, 31 Dec 2003 13:13:20 +0900 From: horio shoichi <bugsgrief@bugsgrief.net> To: Terry Singh <terrysingh@yahoo.com> Cc: freebsd-questions@freebsd.org Subject: Re: arp request problem with firewall Message-ID: <20031231.041325.ffcbd3fce0f52dd7.10.0.3.9@bugsgrief.net> In-Reply-To: <20031230003040.81915.qmail@web40707.mail.yahoo.com> References: <20031230003040.81915.qmail@web40707.mail.yahoo.com>
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On Mon, 29 Dec 2003 16:30:40 -0800 (PST) Terry Singh <terrysingh@yahoo.com> wrote: > this is my first post to freebsd questions. > > MY NETWORK > > Internet -- WAN_IF | FIREWALL - 5.1 RELASE | LAN_IF -- LAN network > > The WAN_IF has several public addresses as aliases. I have about 20 servers in > the LAN that require various services allowed to the public Internet. > > I basically am doing a "bimap" one to one mapping per server in the LAN. > This all works great, meaning I can surf etc etc from any LAN server to the > Internet and also, from the Internet I can get published services on LAN > servers. > > Here's the problem: > I already mentioned that each server with a 192.168.50.x address is "bimap"ed > to a public address. The problem is that if I am on any of the LAN servers, and > want to connect to the public address of a server in the LAN, I CANNOT. > Now first of, I could connect using private addresses and of course this works > like it should. But our applications have real DNS names coded in the apps so I > need this to work. > > I know it has something to be with proxy arp so I even tried placing this line > in sysctl.conf: net.link.ether.inet.proxyall=1.\ > no luck. > > ANY IDEAS? > > -------------- > Second problem > One of the LAN servers is a FTP server. From the Internet, I can only connect > using ACTIVE MODE even though I allow both 20/21/tcp inbound. Here's what > happens when passive mode is used: The initial connection is accepted, but then > the server sends its private address instead of its proper public address! Of > course it's not gonna work! So I forced active mode and voila! it worked. > What's the fix for this bugger? I now outbound FTP has some built-in proxy ftp > in freebsd but what about inbound? > > thanks, tsingh. > > > > > __________________________________ > Do you Yahoo!? > New Yahoo! Photos - easier uploading and sharing. > http://photos.yahoo.com/ > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" > 1. The network configuration like yours is known not to work. The reason and workarounds are best detailed here. http://www.openbsd.org/faq/pf/rdr.html#reflect 2. The wu-ftp and proftp have the ability to advertize arbitrary address. There may be others, but I don't know. horio shoichi
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