Date: Wed, 23 Dec 2009 10:19:23 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: Mel Flynn <mel.flynn+fbsd.hackers@mailing.thruhere.net> Cc: freebsd-hackers@freebsd.org, freebsd-jail@freebsd.org Subject: Re: Jail on 2 interfaces? Message-ID: <20091223100943.T86040@maildrop.int.zabbadoz.net> In-Reply-To: <200912221734.05795.mel.flynn%2Bfbsd.hackers@mailing.thruhere.net> References: <200912221734.05795.mel.flynn%2Bfbsd.hackers@mailing.thruhere.net>
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On Tue, 22 Dec 2009, Mel Flynn wrote: Hi, first of all this would find more people to help on freebsd-jail as it has nothing to do with hackers ;-) > I don't see this documented in jail(8) nor rc(8) nor defaults/rc.conf, so is > it possible to have 2 IP's on 2 ethernet interfaces? And if so, is it settable > for rc(8)? > > The usage case is to have the same jailed proxy server on two seperate > internal networks. Ideally, the proxy will use one address for outgoing, so I > guess I'll need a default route or dive into the squid config. > > At present I have: > ifconfig_bge0="inet 192.168.177.60 netmask 255.255.255.0" > ifconfig_em0="inet 192.168.176.60 netmask 255.255.255.0" > ifconfig_em0_alias0="inet 192.168.176.62 netmask 255.255.255.255" > jail_squid_rootdir="/usr/squid" > jail_squid_ip="192.168.177.62" > jail_squid_ip_multi0="192.168.176.62" > jail_squid_interface="bge0" > > But this created the IP on bge0 even though one exists on em0. Is it as simple > as not specifying the interface and add the 177.62 alias on bge0? > Ideally I'd have a jail_$jail_ip_multi$aliasno_interface="foo0", but my main > worry is that the jail infrastructure understands the routing involved. >From what you are writing I assume that you are on FreeBSD 7.2-Release or later; no official FreeBSD version before had supported multiple-IPs with a jail. What it did was what you were asking for. That's the problem. 1) either use ifconfig 2) or use jail + interfaces 3) but do not mix them (especially not overlapping) So I would suggest to do it like this: # Base system IPs. ifconfig_bge0="inet 192.168.177.60/24" ifconfig_em0="inet 192.168.176.60/24" jail_squid_rootdir="/usr/squid" # Either use: jail_squid_ip="bge0|192.168.177.62/32,em0|192.168.176.62/32" # or: jail_squid_ip="bge0|192.168.177.62/32" jail_squid_ip_multi0="em0|192.168.176.62/32" but do not use jail_squid_interface=".." as that will be a global default for that jail. As you can see, I removed the ifconfig_em0_alias0 line. If you want to keep that and mix things then you could do: jail_squid_ip="bge0|192.168.177.62/32" jail_squid_ip_multi0="192.168.176.62/32" again without the jail_squid_interface=".." line. HTH /bz -- Bjoern A. Zeeb It will not break if you know what you are doing.
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