similar to: IPFW: Blocking me out. How to debug?

Hi peeps, After compiling ipfw into the new 6.2 kernel, and typing "ipfw list", all I get is: "65535 deny ip from any to any" From reading the docs, this might indicate that this is the default rule. (I am certainly protected this way--but can't be very productive ;^) ) By the way, when I run "man ipfw" I get nothing. Using this instead:

>Date: Sun, 23 Dec 2007 06:04:02 -0800 (PST) >From: Nash Nipples <trashy_bumper@yahoo.com> >To: freebsd-security@freebsd.org >Subject: Re: IPFW: Blocking me out. How to debug? > >Dear W.D. > >oh come on. i have the same problem. Which problem are we talking about? cut and paste problem. >cut and paste logic: > >#!/bin/sh >#1. count packets >#2.

If someone has some free time, can you go over my ipfw config. See if I have any problems, or things i should add. Im not an ipfw expert or anything. Here is the config. 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

heya i've been using freebsd's ipfw for quite a while and recently on a new server i've got this issue with ipfw that i can't understand ... something is wrong ... 01000 8042 1947866 allow ip from any to any via fxp0 01010 0 0 allow ip from any to any via lo0 01014 9886 4170269 divert 8668 ip from any to any in via vr0 01015 0 0 check-state 01130 14679 5695969 skipto 1800 ip from

Hi There, I've been having an issue trying to figure out a way to policy route outbound packets from a multihomed machine through the proper interface using IPFW to no avail. I've tried several different incantations of IPFW fwd/forward statements, and none of them seem to do the trick. Basically, I have a host that has multiple Internet connections. This host is running FreeBSD 4.9

Hi, i've set the outside ip for the jail..It works.. When i try to ssh to jail'ed system from the main system (in which is created jail) the connection is successful, but when i try to connect to jailed system from anywhere else i get this message: ssh: connect to host IP_NUMBER port 22: Operation timed out What can be wrong here? How to solve this problem?

550.ipfwlimit check in /etc/periodic/security takes into account only global/default verbosity limit and does not account for a specific logging limit set for a particular rule e.g.: $ ipfw -a l | fgrep log 65000 *521* 41764 deny log logamount *1000* ip from any to any $ sysctl -n net.inet.ip.fw.verbose_limit *100* >From security run output: ipfw log limit reached: 65000 519

I have a FreeBSD box acting as a firewall and NAT gateway I would like to set it up to transparently pass IPSec packets -- I have an IPSec VPN client running on another machine, connecting to a remote network. Is there a way to do this? I can't find any hints in the man pages.

In my recent security email, I got the following errors: cantona.dnswatchdog.com login failures: Aug 20 02:37:19 cantona sshd[9444]: fatal: Write failed: Operation not permitted Aug 20 04:30:42 cantona sshd[16142]: fatal: Write failed: Operation not permitted Aug 20 21:21:51 cantona sshd[45716]: fatal: Write failed: Operation not permitted So three questions: What is it? Should I be worried?

Hi there, Is there some way to configure ipfw to do traffic normalizing ("scrubbing", as in ipf for OpenBSD)? Is there any tool to do it for FreeBSD firewalling? I've heard that ipf was ported on current, anything else? TIA, /Dorin. __________________________________ Do you Yahoo!? Yahoo! Mail SpamGuard - Read only the mail you want. http://antispam.yahoo.com/tools

I'm not a master of the internet RFCs, but I do believe icmp messages have different types. Now to enable traceroute for IPFW, I might put in a rule like this: ipfw add pass icmp from any to me However, how would I make a rule to limit icmp messages to just those used by traceroute? Can the messages be distinguished as such? A dynamic rule that exists only for the duration of a traceroute

Hi ! First of all, I am sorry if this is not the list for that, but I've been learning (a little bit...) a way to implement a freeBSD firewall. So far I came up with a set of rules I would like to show you for commenting. I am sure there're a lot of errors and/or stupid rules (I am not sure the rules order is good for what I need) and I would be really pleased if one could have a look

For reasons unknown, any connections to localhost -- tcp, icmp, or udp -- are all originating from my external interface, rl0: $ telnet localhost 25 Trying ::1... Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Can't assign requested address telnet: Unable to connect to remote host IPFW log: Jul 16 12:46:43 octo ipfw: 100 Accept TCP 192.168.1.119:1434 127.0.0.1:25 out via rl0

We're being ping-flooded by the Nachi worm, which probes subnets for systems to attack by sending 92-byte ping packets. Unfortunately, IPFW doesn't seem to have the ability to filter packets by length. Assuming that I stick with IPFW, what's the best way to stem the tide? --Brett Glass

Hi all, Is it mandatory to add device mem to jails to enable network via the gateway? Left ezjail with FreeBSD-6.3 (and a hardware replacement of my server) and am now starting again with FreeBSD-7.1. Early this week, I upgraded from 7.0 to 7.1 (not having 'used' jails on 7.0). After creating the jail with `ezjail-admin update -i` I created a 'ports build' jail `ezjail-admin

Hi all, I am looking at securing a web server using the FreeBSD MAC Framework. To make things clear I will call the hosted users "web users". Those are the issues I am dealing with: ** Network Security ** - Web users shouldn't be able to connect to reserved local ports apart from 25(smtp); 80(http); 443(https) and 3306(MySQL) Solution: run the web server and web users shell in

Hi security@ list, In my self written, large ipfw rule set, I had something that passed http to allow me to browse most but not all remote sites. For years I assumed the few sites I had difficulty with were cases pppoed MTU != 1500, from not having installed tcpmssd on my 4.*-RELEASE, but then running 6.1-RELEASE I realised that wasn't the problem. http://www.web.de Still failed, &

I've been using ipfw for a while to create a router with NAT and packet filtering, but have never combined it with stateful filtering, instead using things like "established" to accept incoming TCP packets which are part of a conversation initiated from the "inside". I'd like to move to using keep-state/check-state to get tighter filtering and also to allow outgoing

Hi all: I have strange probelm with rc.conf. I set up ipfw (compiled into kernel) on freebsd-5.4 and it doesn't seem to load ipfw rulesets (it uses default ruleset 65335 locking out everything). I have to do "sh /etc/ipfw.rules" in order to load the rulesets, once I did that, I can access the box from remote locations here is my rc.conf: host# more /etc/rc.conf

Hello, I have configured jail for users with sshd ftpd and auth. I started this jail on IP 127.0.0.10(there is an alias on lo0 interface), there was not any bigger problem to start it. But i have a problem with internet in this jail. I can log in to this jail through ssh or ftpd but i can't connect to the internet. I try to set up some kind of nat but it doesn't work. Can anybody help me