Date: Wed, 28 Jul 2004 12:38:56 -0700 From: "Nick Twaddell" <nick@webspacesolutions.com> To: <freebsd-security@freebsd.org> Subject: Ipfw config Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAKmEo4qg7m0yZUDt8n826%2BsKAAAAQAAAAqv4cwiUGA0WseaLCKHyI2AEAAAAA@webspacesolutions.com>
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That last email got a little garbled, I forgot to take it off of html :) add 100 allow all from any to any via lo0 add 110 deny log all from any to 127.0.0.0/8 add 120 deny log ip from 127.0.0.0/8 to any add 00200 check-state add 00250 deny all from any to any frag in via bge0 add 00260 deny tcp from any to any established in via bge0 ###### outbound section ###### ## standard http ## add 00300 allow tcp from any to any 80 out via bge0 setup keep-state ## secure https ## add 00301 allow tcp from any to any 443 out via bge0 setup keep-state ## dns ## add 00310 allow tcp from any to any 53 out via bge0 setup keep-state add 00311 allow udp from any to any 53 out via bge0 keep-state ## pop & smtp ## add 00330 allow tcp from any to any 25 out via bge0 setup keep-state add 00331 allow tcp from any to any 110 out via bge0 setup keep-state ## give root all ## add 00340 allow tcp from me to any out via bge0 setup uid root keep-state ## ftp with passive ports ## add 00375 allow tcp from me to any 21 out via bge0 setup keep-state add 00376 allow tcp from me to any 49152-65535 out via bge0 setup keep-state ## ssh ## add 00380 allow tcp from any to any 22 out via bge0 setup keep-state ## ntp ## add 00390 allow tcp from any to any 123 out via bge0 setup keep-state add 00391 allow udp from any to any 123 out via bge0 keep-state ## ident ## add 00400 allow tcp from any to any 113 out via bge0 setup keep-state add 00401 allow udp from any to any 113 out via bge0 keep-state ## whois ## add 00410 allow tcp from any to any 43 out via bge0 setup keep-state ## snmp ## add 00420 allow udp from any to any 161 out via bge0 keep-state ## finger ## add 00430 allow tcp from any to any 79 out via bge0 setup keep-state add 00431 allow udp from any to any 79 out via bge0 keep-state ###### inbound section ####### ## standard http ## add 00600 allow tcp from any to any 80 in via bge0 setup keep-state ## secure https ## add 00601 allow tcp from any to any 443 in via bge0 setup keep-state ## dns ## add 00611 allow udp from any to me 53 in via bge0 keep-state add 00612 allow tcp from any to me dst-port 53 in via bge0 setup keep-state ## pop & smtp ## add 00630 allow tcp from any to me 25 in via bge0 setup keep-state add 00631 allow tcp from any to me 110 in via bge0 setup keep-state ## imap ## add 00635 allow tcp from any to me 143 in via bge0 setup keep-state ## ftp ## add 00640 allow tcp from any to me 21 in via bge0 setup keep-state add 00641 allow tcp from any to me 49152-65535 in via bge0 setup keep-state #add 00641 allow tcp from any 20 to any 1024-49151 out via bge0 setup keep-state ## ssh ## add 00660 allow tcp from any to me 22 in via bge0 setup keep-state ## snmp ## add 00690 allow udp from any to me 161 in via bge0 keep-state ## razor ## add 00695 allow tcp from me to any dst-port 2703 out via bge0 setup keep-state ###### ICMP ###### ## Allow out & in console traceroot command ## add 00700 allow udp from me to any 33435-33500 out via bge0 keep-state add 00701 allow log icmp from any to me icmptype 3,11 in via bge0 limit src-addr 2 ## ping out ## add 00710 allow icmp from any to any out via bge0 keep-state ## ping in ## add 00720 allow log icmp from any to me icmptype 0,8 in via bge0 ## This sends a RESET to all ident packets ## add 00730 reset log tcp from any to me 113 in via bge0 limit src-addr 4 ## Stop & log external redirect requests ## add 00740 deny log icmp from any to any icmptype 5 in via bge0 ## Stop & log spoofing Attack attempts ## add 00750 deny log ip from me to me in via bge0 ## Stop & log ping echo attacks ## add 00760 deny log icmp from any to me icmptype 0,8 in via bge0 ###### Everything Else ##### ## Reject & Log all setup of tcp incoming connections from the outside ## add 00770 deny log tcp from any to any setup in via bge0 ## Reject all port 80 http packets that fall through to here ## add 00780 deny tcp from any to any 80 out via bge0 ## Everything else is denied by default ## add 00790 deny log logamount 500 all from any to any This should work
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