Date: Tue, 19 Sep 2000 22:25:31 -0700 From: Chip <chip@wiegand.org> To: cjclark@alum.mit.edu Cc: "seafug@dub.net" <seafug@dub.net>, "freebsd-questions@freebsd.org" <freebsd-questions@FreeBSD.ORG> Subject: Re: natd does port forwarding? Message-ID: <39C84A4B.766B5B24@wiegand.org> References: <39C6FCCC.D0103226@wiegand.org> <20000918225104.I367@149.211.6.64.reflexcom.com> <39C70308.EF52766F@wiegand.org> <20000919000233.L367@149.211.6.64.reflexcom.com>
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This is a multi-part message in MIME format. --------------8BB79A68AA834B606A9B3B6F Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit According to top natd is running, in fact, after a reboot it showed two instances of it running. I have attached my rc.conf, rc.firewall, and natd.conf in the hopes that someone can tell me where I have gone wrong, because port forwarding is not working. More details in the text below for any new readers. The firewall is basically the default, I will tighten up the rules after I get port-forwarding running. Any help would be greatly appreciated. -- Chip W. www.wiegand.org Alternative Operating Systems "Crist J . Clark" wrote: > > On Mon, Sep 18, 2000 at 11:09:12PM -0700, Chip wrote: > > "Crist J . Clark" wrote: > > > > > > On Mon, Sep 18, 2000 at 10:42:36PM -0700, Chip wrote: > > > > I am wanting to redirect requests to my web site on a public > > > > isp to my newly set up apache web server at home (using this - > > > > <meta http-equiv="Refresh" Content="5; > > > > url=http://208.194.173.26">; which does work fine). > > > > I have natd enabled and natd interface specified in the rc.conf, > > > > and divert sockets compiled into the kernel. It appears that natd > > > > will > > > > redirect incoming http requests to my web server with my > > > > natd.conf written like this- > > > > > > > > use_sockets yes > > > > same_ports yes > > > > interface ep1 > > > > redirect_port tcp 192.168.0.7 80 80 > > > > > > > > Or so it should, I guess. In the services file I have > > > > natd 8668/divert > > > > but I have seen it written up as > > > > natd 6668/divert > > > > in some sources, which is correct? > > > > > > > > Also, when I enter natd at the command line I get the > > > > following message - > > > > natd: aliasing address not given > > > > > > How are you starting natd(8)? With, > > > > > > # natd -f /etc/natd.conf > > > > > > Right? > > > > It starts at boot, but that command does work. Though I found my > > natd in /usr/local/sbin/ and natd.conf in /etc. > > What version of FreeBSd are you running? natd should be /sbin/natd for > 4.x. IIRC, it is (or was) /usr/sbin/natd in 3.x. /etc/natd.conf is > wherever you put it. It does not exist by default. > > > Now there is a > > copy of both in both directories, which is probably not right, > > but it is running and does start on boot-up. > > Both directories? > -- > Crist J. Clark cjclark@alum.mit.edu --------------8BB79A68AA834B606A9B3B6F Content-Type: text/plain; charset=us-ascii; name="natd.conf" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="natd.conf" use_sockets yes same_ports yes interface ep1 redirect_port tcp 192.168.0.7:80 80 --------------8BB79A68AA834B606A9B3B6F Content-Type: text/plain; charset=us-ascii; name="rc.conf" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="rc.conf" # This file now contains just the overrides from /etc/defaults/rc.conf # please make all changes to this file. # -- sysinstall generated deltas -- # ifconfig_xl0="inet 192.168.0.1 netmask 255.255.255.0" ifconfig_ep1="inet 208.194.173.26 netmask 255.255.255.128" hostname="firewall2.wiegand.org" linux_enable="YES" moused_enable="YES" firewall_enable="YES" firewall_script="/etc/rc.firewall" firewall_type="simple" gateway_enable="YES" router_enable="YES" defaultrouter="208.194.173.1" natd_enable="YES" natd_interface="ep1" --------------8BB79A68AA834B606A9B3B6F Content-Type: text/plain; charset=us-ascii; name="rc.firewall" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="rc.firewall" ############ # Setup system for firewall service. # $FreeBSD: src/etc/rc.firewall,v 1.30 2000/02/06 19:24:37 paul Exp $ # Suck in the configuration variables. if [ -r /etc/defaults/rc.conf ]; then . /etc/defaults/rc.conf if [ -r /etc/rc.conf ]; then . /etc/rc.conf fi ############ # Define the firewall type in /etc/rc.conf. Valid values are: # open - will allow anyone in # client - will try to protect just this machine # simple - will try to protect a whole network # closed - totally disables IP services except via lo0 interface # UNKNOWN - disables the loading of firewall rules. # filename - will load the rules in the given filename (full path required) # # For ``client'' and ``simple'' the entries below should be customized # appropriately. ############ # # If you don't know enough about packet filtering, we suggest that you # take time to read this book: # # Building Internet Firewalls # Brent Chapman and Elizabeth Zwicky # # O'Reilly & Associates, Inc # ISBN 1-56592-124-0 # http://www.ora.com/ # # For a more advanced treatment of Internet Security read: # # Firewalls & Internet Security # Repelling the wily hacker # William R. Cheswick, Steven M. Bellowin # # Addison-Wesley # ISBN 0-201-6337-4 # http://www.awl.com/ # if [ -n "${1}" ]; then ifirewall_type="${1}" fi ############ # Set quiet mode if requested # case ${firewall_quiet} in [Yy][Ee][Ss]) fwcmd="/sbin/ipfw -q" ;; *) ifwcmd="/sbin/ipfw" ;; esac ############ # Flush out the list before we begin. # /sbin/ipfw -f flush ############ # These rules are required for using natd. All packets are passed to # natd before they encounter your remaining rules. The firewall rules # will then be run again on each packet after translation by natd, # minus any divert rules (see natd(8)). # #case ${natd_enable} in #[Yy][Ee][Ss]) # if [ -n "ep1" ]; then /sbin/ipfw add divert natd all from any to any via ep1 #fi # ;; #esac ############ # If you just configured ipfw in the kernel as a tool to solve network # problems or you just want to disallow some particular kinds of traffic # then you will want to change the default policy to open. You can also # do this as your only action by setting the firewall_type to ``open''. # /sbin/ipfw add 65000 pass all from any to any ############ # Only in rare cases do you want to change these rules # /sbin/ipfw add 100 pass all from any to any via lo0 /sbin/ipfw add 200 deny all from any to 127.0.0.0/8 # If you're using 'options BRIDGE', uncomment the following line to pass ARP #${fwcmd} add 300 pass udp from 0.0.0.0 2054 to 0.0.0.0 # Prototype setups. # case ${firewall_type} in [Oo][Pp][Ee][Nn]) #if [ "${firewall}" = "open" ]; then /sbin/ipfw add 65000 pass all from any to any ;; [Cc][Ll][Ii][Ee][Nn][Tt]) ############ # This is a prototype setup that will protect your system somewhat # against people from outside your own network. ############ #elif [ "${firewall}" = "client" ]; then # set these to your network and netmask and ip net="192.168.0.0" mask="255.255.255.0" ip="192.168.0.1" # Allow any traffic to or from my own net. /sbin/ipfw add pass all from ${ip} to ${net}:${mask} /sbin/ipfw add pass all from ${net}:${mask} to ${ip} # Allow TCP through if setup succeeded /sbin/ipfw add pass tcp from any to any established # Allow IP fragments to pass through /sbin/ipfw add pass all from any to any frag # Allow setup of incoming email /sbin/ipfw add pass tcp from any to ${ip} 25 setup # Allow setup of outgoing TCP connections only /sbin/ipfw add pass tcp from ${ip} to any setup # Disallow setup of all other TCP connections /sbin/ipfw add deny tcp from any to any setup # Allow DNS queries out in the world /sbin/ipfw add pass udp from any 53 to ${ip} /sbin/ipfw add pass udp from ${ip} to any 53 # Allow NTP queries out in the world /sbin/ipfw add pass udp from any 123 to ${ip} /sbin/ipfw add pass udp from ${ip} to any 123 # Everything else is denied by default, unless the # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel # config file. ;; [Ss][Ii][Mm][Pp][Ll][Ee]) ############ # This is a prototype setup for a simple firewall. Configure this # machine as a named server and ntp server, and point all the machines # on the inside at this machine for those services. ############ #elif [ "${firewall}" = "simple" ]; then # set these to your outside interface network and netmask and ip oif="ep1" onet="208.240.173.0" omask="255.255.255.128" oip="208.240.173.26" # set these to your inside interface network and netmask and ip iif="xl0" inet="192.168.0.0" imask="255.255.255.0" iip="192.168.0.1" # Stop spoofing /sbin/ipfw add deny all from ${inet}:${imask} to any in via ${oif} /sbin/ipfw add deny all from ${onet}:${omask} to any in via ${iif} # Stop RFC1918 nets on the outside interface /sbin/ipfw add deny all from 10.0.0.0/8 to any via ${oif} /sbin/ipfw add deny all from any to 10.0.0.0/8 via ${oif} /sbin/ipfw add deny all from 172.16.0.0/12 to any via ${oif} /sbin/ipfw add deny all from any to 172.16.0.0/12 via ${oif} /sbin/ipfw add deny all from 192.168.0.0/16 to any via ${oif} /sbin/ipfw add deny all from any to 192.168.0.0/16 via ${oif} # Stop draft-manning-dsua-01.txt nets on the outside interface /sbin/ipfw add deny all from 0.0.0.0/8 to any via ${oif} /sbin/ipfw add deny all from any to 0.0.0.0/8 via ${oif} /sbin/ipfw add deny all from 169.254.0.0/16 to any via ${oif} /sbin/ipfw add deny all from any to 169.254.0.0/16 via ${oif} /sbin/ipfw add deny all from 192.0.2.0/24 to any via ${oif} /sbin/ipfw add deny all from any to 192.0.2.0/24 via ${oif} /sbin/ipfw add deny all from 224.0.0.0/4 to any via ${oif} /sbin/ipfw add deny all from any to 224.0.0.0/4 via ${oif} /sbin/ipfw add deny all from 240.0.0.0/4 to any via ${oif} /sbin/ipfw add deny all from any to 240.0.0.0/4 via ${oif} # Allow TCP through if setup succeeded /sbin/ipfw add pass tcp from any to any established # Allow IP fragments to pass through /sbin/ipfw add pass all from any to any frag # Allow setup of incoming email /sbin/ipfw add pass tcp from any to ${oip} 25 setup # Allow access to our DNS /sbin/ipfw add pass tcp from any to ${oip} 53 setup /sbin/ipfw add pass udp from any to ${oip} 53 /sbin/ipfw add pass udp from ${oip} 53 to any # Allow access to our WWW /sbin/ipfw add pass tcp from any to ${oip} 80 setup # Reject&Log all setup of incoming connections from the outside /sbin/ipfw add deny log tcp from any to any in via ${oif} setup # Allow setup of any other TCP connection /sbin/ipfw add pass tcp from any to any setup # Allow DNS queries out in the world /sbin/ipfw add pass udp from any 53 to ${oip} /sbin/ipfw add pass udp from ${oip} to any 53 # Allow NTP queries out in the world /sbin/ipfw add pass udp from any 123 to ${oip} /sbin/ipfw add pass udp from ${oip} to any 123 # Everything else is denied by default, unless the # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel # config file. ;; fi ) #[Uu][Nn][Kk][Nn][Oo][Ww][Nn]) ;; ) ) # if [ -r "${firewall_type}" ]; then /sbin/ipfw ${firewall_flags} ${firewall_type} # fi ;; esac fi --------------8BB79A68AA834B606A9B3B6F-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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