Firewall mark classifier in tc(8) Linux Firewall mark classifier in tc(8)NAME
fw - fwmark traffic control filter
SYNOPSIS
tc filter ... fw [ classid CLASSID ] [ action ACTION_SPEC ]
DESCRIPTION
the fw filter allows to classify packets based on a previously set fwmark by iptables. If it is identical to the filter's handle, the fil-
ter matches. iptables allows to mark single packets with the MARK target, or whole connections using CONNMARK. The benefit of using this
filter instead of doing the heavy-lifting with tc itself is that on one hand it might be convenient to keep packet filtering and classifi-
cation in one place, possibly having to match a packet just once, and on the other users familiar with iptables but not tc will have a less
hard time adding QoS to their setups.
OPTIONS
classid CLASSID
Push matching packets to the class identified by CLASSID.
action ACTION_SPEC
Apply an action from the generic actions framework on matching packets.
EXAMPLES
Take e.g. the following tc filter statement:
tc filter add ... handle 6 fw classid 1:1
will match if the packet's fwmark value is 6. This is a sample iptables statement marking packets coming in on eth0:
iptables -t mangle -A PREROUTING -i eth0 -j MARK --set-mark 6
SEE ALSO tc(8), iptables(8), iptables-extensions(8)iproute2 21 Oct 2015 Firewall mark classifier in tc(8)
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Firewall mark classifier in tc(8) Linux Firewall mark classifier in tc(8)NAME
fw - fwmark traffic control filter
SYNOPSIS
tc filter ... fw [ classid CLASSID ] [ action ACTION_SPEC ]
DESCRIPTION
the fw filter allows to classify packets based on a previously set fwmark by iptables. If it is identical to the filter's handle, the fil-
ter matches. iptables allows to mark single packets with the MARK target, or whole connections using CONNMARK. The benefit of using this
filter instead of doing the heavy-lifting with tc itself is that on one hand it might be convenient to keep packet filtering and classifi-
cation in one place, possibly having to match a packet just once, and on the other users familiar with iptables but not tc will have a less
hard time adding QoS to their setups.
OPTIONS
classid CLASSID
Push matching packets to the class identified by CLASSID.
action ACTION_SPEC
Apply an action from the generic actions framework on matching packets.
EXAMPLES
Take e.g. the following tc filter statement:
tc filter add ... handle 6 fw classid 1:1
will match if the packet's fwmark value is 6. This is a sample iptables statement marking packets coming in on eth0:
iptables -t mangle -A PREROUTING -i eth0 -j MARK --set-mark 6
SEE ALSO tc(8), iptables(8), iptables-extensions(8)iproute2 21 Oct 2015 Firewall mark classifier in tc(8)
UTIN Firewall script for Linux 2.4.x and iptables
==============================================
#!/bin/sh
#
# rc.firewall - UTIN Firewall script for Linux 2.4.x and iptables
#
# Copyright (C) 2001 Oskar Andreasson <bluefluxATkoffeinDOTnet>
#
# This program is free software; you can... (5 Replies)
I have a file with colon separated values.. the sample is attached below.
No of fields in each record/line is dependent on the value of field53.
What I need to do is to design a special filter based on specific requirement of some match of values in particular column or combination of columns.
... (2 Replies)
Hello, as i mentioned in my hello thread, i am working on a project to implement a Unix Firewall server for our network.
Obviously there are some basics that would need to be ironed out before i can think of doing this right. Now distro of Unix aside for now, this is what i am thinking for... (11 Replies)
Hi all!
We have a setup of three computers;
Machine A (eth0) -> Machine B (eth0, hso0, tun0) -> Machine C (eth0, tun0)
hso0 is the packet interface of a 3G modem, it behaves like a normal network interface.
Machine B and C are connected in a VPN using openVPN (TCP). Machine A is a... (2 Replies)
I'm having issues with packets dropping somewhere on my firewall, between eth0 and eth2. Firewall is an Astaro box, essentially a pretty gui on top of modified sles10 using iptables.
I started looking into this when people started reporting issues with their ssh connections to a particular... (3 Replies)
Hi all,
I want to make this nw diagram:
Small NW ---(eth1)-- Linux iptables --(eth0)---LAN NW
And with these requirements:
1. Allow only 1 Mac address aa-aa-aa-aa-aa-aa from Small NW to LAN NW
2. Allow list of Mac addresses from LAN NW access to Small NW
What will I... (2 Replies)
Hi,
I have a newly built RHEL5 OS that is unable to talk to the DNS server. I am unable to telnet resolv.conf entry over port 53 but apparently this port has been opened.
# telnet 209.212.96.1 53
and.....
# dig www.google.com
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>>... (9 Replies)
I would like to divide traffic between two squid servers.
I have been thinking about using iptables u32 filter, to check last bit of ip address which is comming to gateway. Then I would like to direct even IP adresses to one squid host, and odd to the other. Is it reasonable ?
Thank you for... (2 Replies)
Hello,
When I type this command:
iptables -I RH-Firewall-1-INPUT -p tcp -m tcp -dport 5666 -j ACCEPTit returns me :Bad argument `5666'
Try `iptables -h' or `iptables --help' for more information. (5 Replies)
Hi,
On my linux server I have 2 routes:
Code:
nexthop via 123.201.254.5 dev eth0 weight 38 nexthop via 111.93.155.149 dev eth2 weight 36
I have a iptable rule like :
iptables -t nat -A PREROUTING -p tcp -i eth0 -d... (5 Replies)
Hi,
How can we differentiate the following two packets and use it in iptables for say string match ? what kind of string we can use for these two types in iptables? any ideas?
In case where the packet is good, we can see lots of ..... ..... .... ................ in the data field.
... (2 Replies)
Hi all,
I am running a CentOS 6.4 box as an IDS and I need to configure one interface as the management interface which will require a firewall. However other ports (in promisc mode without IP) will have to be configured such that IPtables allows all traffic.
I need to achieve this by editing... (4 Replies)
Hey everyone, something curious I found. I was studying up on iptables, and saw that my filter table, has it's INPUT chain to accept all incoming packets..and then to reject all incoming packets. Am I reading this right? take a look.
I couldn't format it properly, so I stuck it on a pastebin and... (4 Replies)