Date: Thu, 28 Jul 2016 05:20:21 +0200 From: olli hauer <ohauer@gmx.de> To: freebsd-ipfw@freebsd.org Cc: "Dr. Rolf Jansen" <rj@obsigna.com> Subject: Re: ipfw divert filter for IPv4 geo-blocking Message-ID: <49c5b646-e524-a1d2-1745-a03c43610819@gmx.de> In-Reply-To: <F4646E16-CC07-4711-AFB0-149E8C1EBB53@obsigna.com> References: <61DFB3E2-6E34-4EEA-8AC6-70094CEACA72@cyclaero.com> <CAHu1Y739PvFqqEKE74BjzgLa7NNG6Kh55NPnU5MaA-8HsrjkFw@mail.gmail.com> <4D047727-F7D0-4BEE-BD42-2501F44C9550@obsigna.com> <c2cd797d-66db-8673-af4e-552dfa916a76@freebsd.org> <9641D08A-0501-4AA2-9DF6-D5AFE6CB2975@obsigna.com> <4d76a492-17ae-cbff-f92f-5bbbb1339aad@freebsd.org> <C0CC7001-16FE-40BF-A96A-1FA51A0AFBA7@obsigna.com> <d9a33781-9ffd-3c27-c7d6-5e3ac0a82a63@gmx.de> <F4646E16-CC07-4711-AFB0-149E8C1EBB53@obsigna.com>
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On 2016-07-27 23:15, Dr. Rolf Jansen wrote: >> Am 27.07.2016 um 17:08 schrieb olli hauer <ohauer@gmx.de>: >> On 2016-07-27 15:36, Dr. Rolf Jansen wrote: >>> >>> I finished adding a second usage form for the geoip tool, namely generation of ipfw table construction directives filtered by country codes. >>> >>> ______________ >>> $ geoip -h >>> geoip v1.0.1 (16), Copyright © 2016 Dr. Rolf Jansen >>> >>> Usage: >>> >>> 1) look-up the country code belonging to an IPv4 address given by the last command line argument: >>> >>> geoip [-r bstfile] [-h] <dotted IPv4 address> >>> <IPv4 address> a dotted IPv4 address to be looked-up. >>> >>> 2) generate a sorted list of IPv4 address/masklen pairs per country code, formatted as ipfw table construction directives: >>> >>> geoip -t [CC:DD:EE:..] [-n table number] [-v table value] [-r bstfile] [-h] >>> >>> -t [CC:DD:EE:..] output all IPv4 address/masklen pairs belonging to the listed countries, given by 2 letter >>> capital country codes, separated by colon. An empty CC list means any country code. >>> -n table number the ipfw table number between 0 and 65534 [default: 0]. >>> -v table value the 32-bit unsigned value of the ipfw table entry [default: 0]. >>> >>> valid arguments in both usage forms: >>> >>> -r bstfile the path to the binary file with the consolidated IP ranges that has been. >>> generated by the 'ipdb' tool [default: /usr/local/etc/ipdb/IPRanges/ipcc.bst]. >>> -h show these usage instructions. >>> ______________ >>> >>> With that, the ipfw configuration script may contain something alike: >>> >>> … >>> # allow only web access from DE, BR, US: >>> /usr/local/bin/geoip -t DE:BR:US -n 7 | /sbin/ipfw -q /dev/stdin >>> /sbin/ipfw -q add 70 deny tcp from not table\(7\) to any 80,443 in recv WAN_if setup >>> … >>> >>> OR, the other way around: >>> … >>> # deny web access from certain disgraceful regions: >>> /usr/local/bin/geoip -t KO:TR:SA:RU:GB -n 66 | /sbin/ipfw -q /dev/stdin >>> /sbin/ipfw -q add 70 allow tcp from not table\(66\) to any 80,443 in recv WAN_if setup >>> … >>> ____________ >> >> Nice work :) >> >> Now it is also possible to use geoip to create files usable for pf. >> (just pipe the output through sed -e 's/table 0 add //') >> >> Perhaps the following diff for Makefile is useful. >> - use PREFIX instead hard coded path >> - use "install -s" instead "strip -x -o" >> - use "install -m" instead "cp ; chmod" > > I changed the Makefile according to your suggestions, and I added another command line option to the geoip tool: > > … > -p plain IP table generation, i.e. without ipfw construction directives, -n and -v flags are ignored. > … > > The changes are already uploaded to GitHub. Thank you :) -- Regards, olli
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