pf is the OpenBSD Packet Filter, a feature-rich IP-layer firewall used on OpenBSD, FreeBSD and NetBSD, as well as in the pfSense open-source firewall appliance software.
6
votes
3answers
750 views
OpenBSD/FreeBSD Firewall w/ GUI that is compatible with Intel 82574L Gigabit LAN NICs
I recently purchased a server to run m0n0wall or pfSense but I've learned since then that both of these firewall products are based on versions of FreeBSD which weren't yet compatible with the NICs in ...
5
votes
1answer
188 views
Block Google requests to 16k using pf firewall
I'd like to block access to Google search using PF after the threshold of 17500 requests (connection established) in 24h, from a host running FreeBSD 9.
What I came up with, after reading pf-faq is ...
4
votes
2answers
572 views
Can I create a pf rule involving MAC address instead of IP?
The title is self explanatory.
I want to create rules in pf running on OpenBSD 4.9 for perticular MAC address, something like
pass in on eth0 from mac 00:04:34:5f:34:33 to mac 34:32:34:06:5e:22
I ...
4
votes
1answer
629 views
OpenBSD pf port forwarding multiple rules
I have a few dozen servers behind OpenBSD firewall with port forwarding. Most rules are very similar and differ only in IPs or sometimes in ports forwarded, so I want to compact them to remove ...
3
votes
2answers
1k views
Create a rule using shell in fresh pfSense installation to open up WAN access to WebConfigurator
I am in a situation where I require WAN access to be opened up to the WebConfigurator through pfSense because I do not have another node connected to the same network to access WebConfigurator from ...
3
votes
1answer
689 views
Provide IPv6 to network from OpenBSD firewall
I have an OpenBSD PF firewall that I have added a IPv6 tunnel to (using HE.net tunnelbroker).
I can ping/traceroute IPv6 addresses from the firewall. Now I want to provide IPv6 services to the ...
3
votes
1answer
87 views
blocking packets larger then specific size with pf
Is there a way with pf to block specific type of packets larger than specific size?
2
votes
2answers
222 views
Default values of pf.conf set parameters
I want to learn default values of these parameters, I read the manual of pf.conf but couldn't find, could you help?
set limit states
set limit src-nodes
set timeout tcp.first
set timeout ...
2
votes
1answer
416 views
How to check pf's queues?
I use FreeBSD and working with pf+ALTQ now.
Something doesn't work and I need a tool to view what requests are marked and moved to a queue "queue_name"
Need something like pftop but showing queues. ...
2
votes
1answer
614 views
Creating pflog interface
I'm attempting to create a pflog interface using ifconfig so I can log to more than one file and when I attempt to execute the following command I get this error. I'm attempting this on a vanilla ...
2
votes
1answer
606 views
Getting per-ip traffic stats from PF
Is there a way to get per-ip traffic stats from PF on OpenBSD 4.9? pfctl can give me the total traffic (bytes) for a given label, and pfstats for a given interface, and pftop can give me a "live" view ...
2
votes
1answer
103 views
Reasonable rate limiting settings with PF firewall
I have the following settings in my pf.conf to dissuade abusive clients (I get a few a day that are obviously just scraping content indiscriminately and slow everything down):
pass in on $ext_if ...
2
votes
1answer
312 views
OS X 10.8: redirecting locally initiated ssh connections to localhost:22
I need to hack the OS X pf to redirect all ssh connections from an user to this machine. I want, when doing
$ ssh google.com
to get the same results as with
$ ssh localhost
ie a connection to ...
2
votes
1answer
273 views
OpenBSD pf - implementing the equivalent of an iptables DNAT
Short version
Server A (OpenBSD 4.7) connects to server B (Windows). IP of server B changes. Server A should be able to connect to server B to both the old and new IP. We cannot configure multiple ...
2
votes
1answer
164 views
FreeBSD - monitor aggregate bandwidth of individual local network devices
I'm looking for ways to monitor the Internet usage - the total amount of data transferred - of individual devices on my network. I'm using FreeBSD 9.0-RELEASE with pf for filtering and NAT. I'm not ...
2
votes
2answers
153 views
How to configure something like “Reflexive ACL” on OpenBSD?
My U-Verse modem has something called "Reflexive ACL" described as
Reflexive ACL: When IPv6 is enabled, you can enable Reflexive Access
Control Lists to deny inbound IPv6 traffic unless this ...
2
votes
1answer
372 views
Inaccurate bandwidth limiting in altq queues
I'm setting up an environment where I have one Linux server, one OpenBSD router and one Linux client and I want to be able to limit how much bandwidth the client should be able to use.
I've been ...
2
votes
1answer
530 views
OpenBSD pf 'match in all scrub (no-df)' causes HTTPS to be unreachable on mobile network
First of all: excuse me for my poor usage of the English language.
For several years I'm experiencing problems with the 'match in all scrub (no-df)' rule in pf. I can't find out what's happening ...
2
votes
0answers
130 views
Is there an equivalent of LinuxIMQs in BSD?
Is there an equivalent of LinuxIMQs in BSD ?
From linuximq.net:
The imq device has two common usage cases:
Ingress shaping:
With linux only egress shaping is possible (except for the ingress ...
1
vote
2answers
2k views
FreeBSD+PF+Passive Firewall=Frustration
I have a FreeBSD server that I'm trying to get FTP working on. If I disable pf everything works great.
If I connect while pf is running I can login successfully-but as soon as I run an ls I get this:
...
1
vote
3answers
2k views
NFS mount “hanging” when accessing from a server on a different subnet
Here's a problem which I am at a loss to diagnose:
Our user home directories are served via NFS from an Apple XServe running Mac OS X 10.5.7. Normally they are exported to our default office subnet, ...
1
vote
2answers
1k views
Using Free/Open BSD + pf as a DDoS filter
Is using Free/Open BSD + pf a workable option for filtering DDoS? Which of the two would perform better under heavy load? (SYN flood maxing a 1 gbit pipe)
Is this even an option to consider, or is a ...
1
vote
1answer
60 views
blocking packets for a non established connection on freebsd pf
For a freebsd pf firewall; I want it to block packets for non established connections. For example , the attacker should not send Reset packets for an unknown not-yet-established connection.
In Linux ...
1
vote
3answers
596 views
Port-Forward for all IPs on an interface
I'm running a java-based web server as a non-privileged user. Therefore it listens on ports 8080 and 8443 instead of 80 and 443.
Right now I'm using the following pf rules to forward the ports ...
1
vote
1answer
534 views
mDNS on bridged OpenVPN network
I have openvpn running on a openbsd server that is behind a firewall, so it is a local member of the LAN. The openvpn is a bridge configuration.
firewall internal 10.0.10.1
openvpn server ...
1
vote
1answer
411 views
A jail that is accessible from network without port forwarding
I am using FreeBSD 7.1 and on my server I have two different jails. One for database and second one for game server. What I need to know is if it is possible to assign game server's jail to public IP ...
1
vote
1answer
44 views
How to filter TCP packets based on flags using Packet Filter
Well, I didn't know exactly how to ask this question, but I know that you can use the keyword flags to especify which flags you want to filter.
According to the documentation of the Packet filter:
...
1
vote
0answers
66 views
freebsd network packet error
I have included netstat output on freebsd 8.0. Ierrs:944998977. pf works on a single core for all session table operations and under a dos flood attack it uses that core %100.
What I want to learn ...
1
vote
1answer
193 views
PF firewall rules help
I'm having a heck of a time creating a pf ruleset for FTP.
What I'm trying to do is :
Only allow $WHITELIST to connect to FTP port 21
Open ports 49152 - 65535 for Passive port range
Can anyone ...
1
vote
1answer
2k views
Help me upgrade my pf.conf for OpenBSD 4.7
I'm planning on upgrading my OpenBSD to 4.7 (from 4.6) and as you may or may not know, they changed the syntax for pf.conf.
This is the relevant portion from the upgrade guide:
pf(4) NAT syntax ...
0
votes
7answers
2k views
reroute DDOS to FBI Illegal? [closed]
Okay I know this might sound silly or dumb, but I would like to know (if anyone knows) if it would be illegal to reroute DDoS traffic to fbi.gov...
I just thought it might be a good idea if you ...
0
votes
3answers
898 views
Does PF support divert like IPFW?
I'm currently using IPFW on 3 dedicated firewall servers, and I would like to convert them to PF for some of its functionalities, but I need divert to work.
Specifically I am teeing packets to a ...
0
votes
2answers
1k views
PF firewall issues with FTP inside FreeBSD jail
I have recently tried to set up jails on one of my FreeBSD servers, and I’m running into strange errors while trying to download FreeBSD packages via FTP.
I have these rules in the PF firewall to ...
0
votes
1answer
102 views
freebsd pf squid transparent
I have broken my brain dealing with this.
Squid was built from ports /usr/ports/www/squid32 with PF_TP enabled.
I have internet but strangely it bypasses squid. Obviously, squid logs are empty.
I ...
0
votes
1answer
122 views
PF tagging then adding to table
could someone please provide an example on how to add a tagged packet to a table? I have found commands to do it from the command line but can you setup a specific rule to do it inside of pf.conf?
...
0
votes
1answer
60 views
Passing traffic to a service behind firewall
I am running nginx on port 8080, now I like to make it accessible from the internet, for that I open a port on my Router, next I add some rules to my PF, but a sniff from wireshark I see port ...
0
votes
1answer
104 views
OpenBSD ftp-proxy behind NAT itself
Is it possible to change the PASV IP ftp-proxy of OpenBSD sends to clients, without changing the listen address of redirection control (-b <address>)?
I have the following setup:
FTP client ...
0
votes
1answer
302 views
pfSense to ASA L2L VPN - infrequent, short-lasting, but consistent disconnections
Has anyone here been able to specify a stable configuration for the L2L VPN between an ASA device and pfSense 2.0.1? I am using the most accomodating settings on the ASA side (DefaultL2LGroup with ...
0
votes
1answer
284 views
OpenBsd 5 port forwarding
I'm trying to configure pf port forwarding on OpenBSD 5.0
The firewall machine has two nics:
em0: 192.168.200.3
vic0: 192.65.214.136
I would like to forward all packets comming into ...
0
votes
2answers
819 views
Slow upload speeds with pfsense virtual appliance
I have a pfSense virtual appliance set up in front of a Windows server. The pfSense appliance has been configured with two L2L IPSec VPN sites and not too much else. The appliance has two vNics which ...
0
votes
2answers
39 views
Keep connection state with target machine in PF when reply comes from a different IP
I'm facing a challenge with my PF firewall on an OpenBSD machine.
From a client (A) I'm connecting to a server (B) using a target ip (SRV-IP-1).
The server is replying to my request, but sourcing the ...
0
votes
2answers
975 views
PF rules and configuration to allow a local IP alias to NAT on FreeBSD?
Here's exact details of my configuration:
Firewall/DNS Server: 192.168.2.1 (local lan) which routes out to the internet. <-- NOT UNDER MY CONTROL
My FreeBSD Server: 192.168.2.23 (LAN)
"Inside" ...
0
votes
2answers
143 views
using “include” like statement in pf.conf to include some parts from other files
I want to be able to include some parts of my pf.conf from other set of files.
For example I will include "set timeout" vs like statements in another file.
Using anchors and "load anchor from ...
0
votes
2answers
1k views
FreeBSD nat via PF: how to change from random UDP ports to incremental?
I'm testing NAT penetration code and need a symmetric NAT. I have configured FreeBSD with PF, very simple rule:
# rl0 in WAN on DHCP, sk0 is LAN with computers behind this NAT.
nat on rl0 from ...
0
votes
1answer
729 views
pf port forwarding
I've got the basics of my pf firewall/NAT router setup working; traffic going out fine, DNS requests on port 53 mapped into an internal subnet and back out again successfully (no change in port ...
0
votes
2answers
340 views
Packet Filter configuration to restrict traffic to the local host
I have been running a pf based filtering router on OpenBSD 4.3 for about a year now. My current task is to set up a new network segment for hosting our external sites.
My aim is that machines set up ...
0
votes
1answer
35 views
How to run python script which required root privilage for execution in apache with mod_python at openbsd
I am trying to run python script in Apache 2.x with mod_python.
I edited httpd.conf with publisher
LoadModule python_module /usr/local/apache2/modules/mod_python.so
<Directory ...
0
votes
1answer
54 views
Altq/Pf trouble on OpenBSD
I'm having some trouble with pf/altq on OpenBSD but as I'm new to it I'm not sure if its because I'm misunderstanding how to use anchors, or if something is wrong with my system.
I'm trying to add ...
0
votes
1answer
65 views
Harvest netblocks of good MTAs from SPF for whitelisting [closed]
I'm configuring greylisting, and one of the things I would like to do is explicitly whitelist good MTAs of e.g. google.com, ebay.com, schwab.com, freebsd.org, uwaterloo.ca etc.
It seems like with the ...
0
votes
1answer
539 views
Bypassing SQUID on freebsd with PF
I have PF+SQUID31 on FREEBSD-9.0, and I want to have some hosts(aka goodguys) to bypass the proxy, so that torrents are not logged.
Also, I am not sure about transparent. It means that I dont have to ...
