Date: Sat, 24 Sep 2005 21:57:57 -0700 (PDT) From: Bigby Findrake <bigby@ephemeron.org> To: "carlopmart@gmail.com" <carlopmart@gmail.com> Cc: freebsd-security <freebsd-security@freebsd.org> Subject: Re: Encrypt some services with ipsec Message-ID: <Pine.BSF.4.44.0509242146130.60044-100000@home.fake.net> In-Reply-To: <43359660.2060606@gmail.com>
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On Sat, 24 Sep 2005, carlopmart@gmail.com wrote: > Hi all, > > I have two prodction servers with FreeBSD 5.4 (all security patches > are applied). They running some services like dns, ssh, http, ftp, etc. > But I woukd like to encrypt some services for some hosts with ipsec when > it is accessed. For example: > > - DNS resolution: not encrypted. > - DNS replication master-slave: encrypted by ipsec. > - Telnet: encrypted by ipsec for some hosts. Deny for the rest. > - SSH: not encrypted for some hosts, encryted by ipsec for the rest. > - FTP: encrypted by ipsec. > - HTTP: encrypted by ipsec. > > is it possible to encrypt only certains services under ipsec tunnel?? Someone please check my work. >From the man page on setkey, it looks like you can specify ports for the security policies, so you could specify certain ports to encrypt, and not specify a blanket/default host-to-host policy for all other traffic, so that all other unspecified traffic is unencrypted. For example: ---------------------BEGIN /ETC/IPSEC.CONF------------------------------- # # encrypt all dns traffic between master host A (1.1.1.1) slave host B # (1.1.1.2) spadd 1.1.1.1 1.1.1.2[53] any -P out ipsec esp/transport//use; spadd 1.1.1.2[53] 1.1.1.1 any -P in ipsec esp/transport//use; spadd 1.1.1.1[53] 1.1.1.2 any -P out ipsec esp/transport//use; spadd 1.1.1.2 1.1.1.1[53] any -P in ipsec esp/transport//use; # # encrypt telnet traffic between server A (1.1.1.1) and client C (1.1.1.3) spadd 1.1.1.1[23] 1.1.1.3 any -P out ipsec esp/transport//use; spadd 1.1.1.3 1.1.1.1[23] any -P in ipsec esp/transport//use; # # encrypt http traffic between server A (1.1.1.1) and client D (1.1.1.4) spadd 1.1.1.1[80] 1.1.1.4 any -P out ipsec esp/transport//use; spadd 1.1.1.4 1.1.1.1[80] any -P in ipsec esp/transport//use; # # and all other traffic is unencrypted. ---------------------END /ETC/IPSEC.CONF------------------------------- /-------------------------------------------------------------------------/ I used to hate weddings; all the Grandmas would poke me and say, "You're next sonny!" They stopped doing that when i started to do it to them at funerals. finger://bigby@ephemeron.org http://www.ephemeron.org/~bigby/ news://news.ephemeron.org/alt.lemurs /-------------------------------------------------------------------------/
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