search for: ipfw2

hi - this is my first post to this list so go easy on me ! I am trying to find info on using ipfw2 with freebsd 5.2.1 as I have read that it supports MAC address based firewalling. Situation is, I have a small externally managed VPN network, about 12 different subnets all terminating in my office location, and all managed by a tier 1 telco. Problem is, their CPE routers do not have any firewalli...

>Submitter-Id: current-users >Originator: Andy Gilligan >Confidential: no >Synopsis: [PATCH] ipfw2 fails with 'bad command' error >Severity: serious >Priority: high >Category: bin >Class: sw-bug >Release: FreeBSD 4.8-STABLE i386 >Environment: System: FreeBSD vega 4.8-STABLE FreeBSD 4.8-STABLE #13: Sun Jul 20 01:01:07 BST 2003 root@vega:/usr/obj/usr/src/sys/VEGA i386 &...

...e0 In theory, this should allow in SSH and nothing else. When I install this firewall configuration, I'm locked out of the box. An inspection of the logs shows that rule 499 is being triggered by an attempted incoming connection. Can anybody help? Also, would it be better to upgrade to ipfw2?? If so, how do I do that? Thanks, -N

Dear list! I have a little problem, trying to enable logging of deny rule. I have enabled it via kernel: options IPFIREWALL options IPFIREWALL_VERBOSE options IPFIREWALL_VERBOSE_LIMIT=3 It is ipfw2. After that, my inten- tion was to use syslogd and !ipfw *.* /var/log/ipfw.log and newsyslog with /var/log/ipfw.log 600 3 100 * J In rc.conf I have firewall_enable="YES" firewall_logging="YES" Well! Firewall works, I have data with "ipfw show", but the...

Hi. Since this revision (appeared in 6.3) I think ipfw violates POLA. I mean "ipfw table N list" shows values of table in Internet '.' notation. A friend of mine was surprised to found Internet representation of this "optional 32-bit unsigned value". For example security/bruteblock stores unix timestamps here and AFAICS there is no possibility to come back to the

Dear FreeBSD! I would like to use custom rules file with ipfw2. My computer goes to the net via dial-up modem and kernel ppp type. Since I don't have experience with dinamic rules, but want to, reading tutorials stranded me somewhere in the middle. In this moment I need recall of known links to docs about topic. Provider gives new address every time when c...

Hi, has anybody an example of firewall rules written with IPFW2 using the MAC asdress? Regards, Dirk Hombrecher

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

Hello, I noticed that after enabling firewall in my kernel (5.3-release), my dmesg now gives me this: ipfw2 initialized, divert disabled, rule-based forwarding disabled, default to accept, logging limited to 5 packets/entry by default On 5.2.1, I used to get this: ipfw2 initialized, divert disabled, rule-based forwarding enabled, default to accept, logging disabled If both cases, I am adding this t...

...9:13 PM 7/23/2008, Julian Elischer wrote: >julian 2008-07-24 01:13:22 UTC > > FreeBSD src repository > > Modified files: (Branch: RELENG_7) > contrib/pf/pfctl parse.y > lib/libc/sys Symbol.map getsockopt.2 > sbin/ipfw ipfw.8 ipfw2.c > sys/conf NOTES options > sys/contrib/ipfilter/netinet ip_fil_freebsd.c > sys/contrib/pf/net pf.c pf_ioctl.c > sys/kern init_sysent.c sys_socket.c syscalls.c > syscalls.master systrace_args.c >...

The man page gives this example, however, when I attempt to use it, it seems to block the whole set? Could someone tell me what's going wrong here please. Thanks heaps.. This works, ${fwcmd} add deny log all from any to 203.1.96.1 in via ${oif} This blocks the whole IP block, not just the list? ${fwcmd} add deny log all from any to 203.1.96.0/24{2,6-25,27-154,156-19

...and that those are replies on DNS queries that for some reason took too long time to be answered. I do not want to turn off the "log in vain" feature. As these strings fill up my log I am afraid to miss some sensitive messages (e.g. hacker's attack :) I'm using FreeBSD 5.1 with ipfw2 that allows via static rules both DNS queries and DNS replies. The main application that generates queries is sendmail. What can be done? I've found a lot of similar questions at google but there was no a single answer. I'd be happy, for example, to increase the FreeBSD...

Dear All. I want to use 'not' for 2 addresses (for both) in ipfw2 rule. The only way that looks like what I need is # ipfw add count from IP1 to not IP2,IP3 But does this rule indeed makes what I want? Does it count all packets destined to addresses other then IP2 AND IP3?! No other syntax works. For example more logically correct not IP2 AND not IP3 or even n...

...vice ed options IPFIREWALL #firewall options IPFIREWALL_VERBOSE #enable logging to syslogd(8) options IPFIREWALL_VERBOSE_LIMIT=0 #limit verbosity options IPDIVERT #divert sockets options DUMMYNET options IPFW2 [...] When the box starts it complains: Sep 15 15:54:21 test2 /kernel: acd0: CDROM <TOSHIBA CD-ROM XM-6002B> at ata1-master PIO3 Sep 15 15:54:21 test2 /kernel: Mounting root from ufs:/dev/ad0s1a Sep 15 15:54:21 test2 /kernel: module_register: module miibus/ukphy already exists! Sep 15 15:...

root@vigilante /root cuaa1# man init |tail -n 130 |head -n 5 3 Network secure mode - same as highly secure mode, plus IP packet filter rules (see ipfw(8) and ipfirewall(4)) cannot be changed and dummynet(4) configuration cannot be adjusted. root@vigilante /root cuaa1# sysctl -a |grep secure kern.securelevel: 3 root@vigilante /root cuaa1# ipfw show 00100 0 0 allow

...ello, I''m looking how (if) can I solve the following problem using HTB and iproute2: I need to assing the same bandwidth limit to every client, but the problem is that clients will be random - i.e. I know niether number of clients no IP or MAC addresses. If anybody knows FreeBSD''s ipfw2 - I''m looking for something like "ipfw pipe 150 config mask dst-ip 0xffffffff bw 700Bytes/s" best regards, Andriy Korud

I hesitate to call this a "bug" as I don't know all the history behind the ipfw2 decisions, so let me toss this out there and see I'm just missing something. Overview ======== The negated operator, "not recv any" was taken to mean "any packet never received by an interface" believed to be equivalent to "any packet that originated on the curren...

> What would you recommand ? Are there any other elegant solutions ? > How about using 802.1Q vlan's and dedicate a vlan to each port. If more than 4000 users then add more gateways. Just be sure to go for switches that allow you to deny incoming already tagged packets on the user side as some switches passes already tagged packets. For a wireless environment i would suggest PPPoE

Hi. On my FreeBSD 4.8 configured IPFW2+IPF+IPNAT and I use them all: - IPFW - traffic accounting, shaping, balancing and filtering; - IPFilter - policy routing; - IPNAT - masquerading. I want to know, how IP-packets flow through all of this components? What's the path? incoming: IPFW Layer2 -> IPFW&Dummynet -&g...

...0x2ff irq 3 on isa0 sio1: type 16550A ppc0: <Parallel port> at port 0x3bc-0x3bf irq 7 on isa0 ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode plip0: <PLIP network interface> on ppbus0 lpt0: <Printer> on ppbus0 lpt0: Interrupt-driven port ppi0: <Parallel I/O> on ppbus0 ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to accept, logging limited to 100 packets/entry by default IPv6 packet filtering initialized, default to accept, logging limited to 100 packets/entry DUMMYNET initialized (011031) IPsec: Initialized Security Association Processing....