forward packet from input chain to output


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Operating Systems Linux Ubuntu forward packet from input chain to output
# 1  
forward packet from input chain to output

Hi,
I receive a packet at input chain of iptables in filter table. How can i forward that same packet exactly to the output chain of the iptables in filter table. I need this help desperately. Thanks.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #21
Difficulty: Easy
James Gosling developed the Java Programming Language.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Looping through input/output

Hi, I've got a directory of about 6000 txt files that look like this: a b c d e f g h k l m n I need to execute a command on them to combine them and, in the end, have one big file with all the needed columns taken form all the 6000 files. I've got the "combining" program, but my problem... (26 Replies)
Discussion started by: zajtat
26 Replies

2. UNIX for Dummies Questions & Answers

Filtering output from given input

Hi All, I have a input file as below. Input file may contain more hostlists. sample Input file $ cat hostlist.lst cs18-db1-1-sjl cs22-db1-1-was na88-db1-1-chi na21-db1-2-was I want the output like below format. Pls help. Thanks ! Output format: ... (4 Replies)
Discussion started by: kamauv234
4 Replies

3. AIX

Packet loss coming with big packet size ping

(5 Replies)
Discussion started by: Vishal_dba
5 Replies

4. IP Networking

Creating iptables filter rules applicable to both FORWARD and OUTPUT chains

Hi all, I have a script which permits users to access to a large list of IP ranges. Before, access to these ranges was granted by using a shell script to perform the necessary FORWARD chain command to allow traffic coming from the br0 interface and exiting the WAN interface, since br0 was... (0 Replies)
Discussion started by: haggismn
0 Replies

5. Ubuntu

iptable forward packet

Hi, I have the doubt which involved following configuration. comp1<--->main<--->comp2 Comp1 sends icmp packet to main. Main takes that packet and changes destination address to comp2 and source address to it own. I can capture the packet send from comp1 to main using netfilter. I can see the... (0 Replies)
Discussion started by: arsipk
0 Replies

6. Ubuntu

Iptables forward traffic to forward chain!!!

Hi, I am new to linux stuff. I want to use linux iptables to configure rule so that all my incoming traffic with protocol "tcp" is forwarded to the "FORWARD CHAIN". The traffic i am dealing with has destination addresss of my machine but i want to block it from coming to input chain and somehow... (0 Replies)
Discussion started by: arsipk
0 Replies

7. UNIX for Advanced & Expert Users

[SOLVED] No INPUT chain on nat table in iptables

Hello, I'm having problem with an iptables rule. It seems that on one of two systems on the nat table, the INPUT chain doesn't exist for some strange reason. I get the error below: # iptables -t nat -A INPUT -j ACCEPT iptables: No chain/target/match by that name. Here is my kernel on... (0 Replies)
Discussion started by: Narnie
0 Replies

8. Shell Programming and Scripting

Dynamic output file generation using a input text file with predefined output format

Hi, I have two files , one file with data file with attributes that need to be sent to another file to generate a predefined format. Example: File.txt AP|{SSHA}VEEg42CNCghUnGhCVg== APVG3|{SSHA}XK|"password" AP3|{SSHA}XK|"This is test" .... etc --------- test.sh has... (1 Reply)
Discussion started by: hudson03051nh
1 Replies

9. Shell Programming and Scripting

input -output file

Hi, I am having an Input file .which is having a list of names. comapring with our database , needs to write the out put in file called output.txt , format should be name--> country--->phone number could you please help me.. thanks in advance (7 Replies)
Discussion started by: hegdeshashi
7 Replies

10. Shell Programming and Scripting

How to chain some commands together

Hey, I am fiddling with a little script to kill a certain program if it freezes. Basically I want to do something like this: ps -A | grep firefox-bin | read -d ' ' pid kill $pid The problem lies when I pipe the output of grep into read. That part does not seem to work the way I want... (4 Replies)
Discussion started by: kermit
4 Replies
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)

Featured Tech Videos