Date: Mon, 24 Apr 2000 21:33:28 -0400 From: David Heller <dheller1@rochester.rr.com> To: freebsd-questions@freebsd.org Subject: Re: Natd doesn't work after upgrade to 4.0 stable Message-ID: <3904F5E7.DFA350E@rochester.rr.com> References: <200004242334.e3ONYwZ54369@cytosine.dhs.org> <3904E8DC.458BC152@rochester.rr.com> <3904EB38.49C5236C@rochester.rr.com>
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This is a multi-part message in MIME format. --------------7DDB1D0FA2EC518E72EC4DF4 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit David Heller wrote: > > David Heller wrote: > > > > Bhishan Hemrajani wrote: > > > > > > If you take a look at your /etc/rc.conf, I see that you have gateway_enable > > > set to "NO". Please set that to yes. > > It is set to "YES" > > > > > > If you don't want to restart, do this: > > > # sysctl -w net.inet.ip.forwarding=1 > > > > > > And also make sure that you have done everything in the instructions of the > > > natd manpage. (man natd) It is near the bottom of the man page. > > > > > > --bhishan > > > > > I'm not sure what's going on now, natd seems to be working but if I open > > up netscape on one of my internal machines say 10.0.0.3 I get the > > following log by running /sbin/natd -f /etc/natd.conf -v -n ep0 but > > nothing seems to be appearing in the netscape window I can't telnet or > > ftp either. log file attached. this is really got me stumped. The other > > possibiltiy is Time Warner is somehow blocking this?? > > > > Thanks again > > > > Dave > > > > - Hi Again, It's not natd daemon it's my firewall it's somehow blocking the connection to the outside. It does not seem to be affecting the gateway itself though. Sorry about the lame questions but I have RTFM. Anyway it appears the firewall rules (rc.firewall) are different in 4.0 Please find enclosed my "rules" maybe someone can point out the offending line" I'm using the "simple" firewall. Thanks, Dave > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message --------------7DDB1D0FA2EC518E72EC4DF4 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 elif [ -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 "${1}" ]; then firewall_type="${1}" fi ############ # Set quiet mode if requested # case ${firewall_quiet} in [Yy][Ee][Ss]) fwcmd="/sbin/ipfw -q" ;; *) fwcmd="/sbin/ipfw" ;; esac ############ # Flush out the list before we begin. # ${fwcmd} -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)). ${fwcmd} add divert natd all from any to any via ep0 ############ # 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''. # # ${fwcmd} add 65000 pass all from any to any ############ # Only in rare cases do you want to change these rules # ${fwcmd} add 100 pass all from any to any via lo0 ${fwcmd} 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]) ${fwcmd} 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. ############ # set these to your network and netmask and ip net="192.0.2.0" mask="255.255.255.0" ip="192.0.2.1" # Allow any traffic to or from my own net. ${fwcmd} add pass all from ${ip} to ${net}:${mask} ${fwcmd} add pass all from ${net}:${mask} to ${ip} # Allow TCP through if setup succeeded ${fwcmd} add pass tcp from any to any established # Allow IP fragments to pass through ${fwcmd} add pass all from any to any frag # Allow setup of incoming email ${fwcmd} add pass tcp from any to ${ip} 25 setup # Allow setup of outgoing TCP connections only ${fwcmd} add pass tcp from ${ip} to any setup # Disallow setup of all other TCP connections ${fwcmd} add deny tcp from any to any setup # Allow DNS queries out in the world ${fwcmd} add pass udp from any 53 to ${ip} ${fwcmd} add pass udp from ${ip} to any 53 # Allow NTP queries out in the world ${fwcmd} add pass udp from any 123 to ${ip} ${fwcmd} 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. ############ # set these to your outside interface network and netmask and ip oif="ep0" onet="24.24.34.106/24" omask="255.255.255.0" oip="24.24.34.106" # set these to your inside interface network and netmask and ip iif="ep1" inet="10.0.0.1/24" imask="255.255.255.0" iip="10.0.0.1" # Stop spoofing ${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif} ${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif} # Stop RFC1918 nets on the outside interface ${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif} ${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif} ${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif} ${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif} ${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif} ${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif} # Stop draft-manning-dsua-01.txt nets on the outside interface ${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif} ${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif} ${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif} ${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif} ${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif} ${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif} ${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif} ${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif} ${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif} ${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif} # Allow TCP through if setup succeeded ${fwcmd} add pass tcp from any to any established # Allow IP fragments to pass through ${fwcmd} add pass all from any to any frag # Allow setup of incoming email ${fwcmd} add pass tcp from any to ${oip} 25 setup # Allow access to our DNS ${fwcmd} add pass tcp from any to ${oip} 53 setup ${fwcmd} add pass udp from any to ${oip} 53 ${fwcmd} add pass udp from ${oip} 53 to any ${fwcmd} add pass tcp from any to ${oip} 67 setup # Allow access to our WWW ${fwcmd} add pass tcp from any to ${oip} 80 setup # Reject&Log all setup of incoming connections from the outside ${fwcmd} add deny log tcp from any to any in via ${oif} setup # Allow setup of any other TCP connection ${fwcmd} add pass tcp from any to any setup # Allow DNS queries out in the world ${fwcmd} add pass udp from any 53 to ${oip} ${fwcmd} add pass udp from ${oip} to any 53 # Allow NTP queries out in the world ${fwcmd} add pass udp from any 123 to ${oip} ${fwcmd} add pass udp from ${oip} to any 123 ${fwcmd} add pass all from any to any # Everything else is denied by default, unless the # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel # config file. ;; [Uu][Nn][Kk][Nn][Oo][Ww][Nn]) ;; *) if [ -r "${firewall_type}" ]; then ${fwcmd} ${firewall_flags} ${firewall_type} fi ;; esac --------------7DDB1D0FA2EC518E72EC4DF4-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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