Sponsored Content
Operating Systems Linux how to allow incoming UDP packets with iptables Post 302627795 by neutronscott on Saturday 21st of April 2012 11:18:47 PM
Old 04-22-2012
change default policy:
Code:
iptables -P OUTPUT ACCEPT

allow all UDP
Code:
iptables -I INPUT -p udp -j ACCEPT

 

10 More Discussions You Might Find Interesting

1. IP Networking

IPv6 UDP server not accepting packets with global address

Hi All, I am running a IPv6 UDP server, which is bound to in6addr_any. When I send a packet from a client to the link-local address of any interface on the linux box, the server accepts the packets. But when I send the packets to the global address the server doesnt pick the packets. On... (0 Replies)
Discussion started by: muralia
0 Replies

2. UNIX for Advanced & Expert Users

Forwarding internal internet packets to internal webserver using iptables

Hi, I need to redirect internal internet requests to a auth client site siting on the gateway. Currently users that are authenticated to access the internet have there mac address listed in the FORWARD chain. All other users need to be redirected to a internal site for authentication. Can... (1 Reply)
Discussion started by: mshindo
1 Replies

3. Cybersecurity

~ IPTables : Limit Incoming UDP Packets With a Certain Length ~

Hello, I am currently trying to limit incoming UDP length 20 packets on a per IP basis to 5 a second using IPTables on a Linux machine (CentOS 5.2). Basically, if an IP is sending more than 5 length 20 UDP packet a second to the local machine, I would like the machine to drop the excess... (1 Reply)
Discussion started by: tomboy123
1 Replies

4. Shell Programming and Scripting

Block incoming traffic FTP from internet using iptables

Hi everybody. I have the next scenary: eth0: WAN eth1: DMZ eth2: LAN I need to block all incoming trafic from the internet through my network LAN using iptables. I have squid but i need to do this using ipatbles. I have been listening about iptables -A FORDAWARD but I am stuck right... (0 Replies)
Discussion started by: edeamat
0 Replies

5. UNIX for Dummies Questions & Answers

Linux box drops the incoming packets

Hi all, I am new to Linux kernel. we have a c file that counts the no. of sends and received packets in each interface, and indicate the user about the error/drop ration of incoming and outgoing packets. in our Linux box , the incoming packets are dropped at random interval. we have our... (1 Reply)
Discussion started by: kannandv
1 Replies

6. IP Networking

how to hack linux driver to delay incoming packets

hello, can anyone suggest how to delay the incoming packets ?? or how the packets are prossed inside the kernal and a way to make the packets wait a while?? it wud be vry helpful regards sameer (7 Replies)
Discussion started by: sameer kulkarni
7 Replies

7. IP Networking

iptables: syntax from drop AND log packets

Good afternoon everyone, It's the iptables n00b again. valiantly learning and reading (and asking for occasional help when I hit a wall - which I think I just did) So far I've gotten logging enabled for iptables. Now, I want to drop AND log an IP connection attempt. Could some wise eyes... (2 Replies)
Discussion started by: putter1900
2 Replies

8. UNIX for Advanced & Expert Users

copy packets from one port to another by iptables

I would like to copy data flow (not redirect!!!) from 1567 port to another 1194 port on same computer. The 1567 Port already binded by Scream program (it is bisy). Is it possible to do it by iptables or for it nesessary another programs? Can you help me in the decision of this question? (1 Reply)
Discussion started by: yanat
1 Replies

9. IP Networking

How to route all incoming packets from one virtual interface?

Hello, I'm trying to route all packets arriving at a particular interface by entering the same interface the virtual interface eth1: 2 and now everything is routed by default gw configured on eth1. eth1 Link encap:Ethernet HWaddr 0a:0e:64:18:52:72 inet addr:192.168.10.15 eth1:2 ... (1 Reply)
Discussion started by: faka
1 Replies

10. IP Networking

How to route packets back to incoming interface?

Hi folks, I have a debian server running an Apache daemon on the eth0 interface. Now from time to time the server has to open an openvpn connection (tun0) to other networks to get some data from there. During this period the Apache is no longer reachable under it's IP address on eth0 because all... (6 Replies)
Discussion started by: flyingwalrus
6 Replies
IPTABLES-SAVE(8)                                                  iptables 1.6.1                                                  IPTABLES-SAVE(8)

NAME
iptables-save -- dump iptables rules to stdout ip6tables-save -- dump iptables rules to stdout SYNOPSIS
iptables-save [-M modprobe] [-c] [-t table] ip6tables-save [-M modprobe] [-c] [-t table] DESCRIPTION
iptables-save and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect- ion provided by your shell to write to a file. -M, --modprobe modprobe_program Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe to determine the exe- cutable's path. -c, --counters include the current values of all packet and byte counters in the output -t, --table tablename restrict output to only one table. If not specified, output includes all available tables. BUGS
None known as of iptables-1.2.1 release AUTHORS
Harald Welte <laforge@gnumonks.org> Rusty Russell <rusty@rustcorp.com.au> Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save. SEE ALSO
iptables-apply(8),iptables-restore(8), iptables(8) The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the internals. iptables 1.6.1 IPTABLES-SAVE(8)
All times are GMT -4. The time now is 06:43 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy