Nat and packet limits with iptables Post: 302836689

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

iptables internal NAT with two public IP

Hello Guys, I have a debian machine that work as a firewall (iptables + squid 2.6) with two physical interfaces: eth0 (public interface) and eth1 (internal interface LAN). I have created an alias eth1:1 in order to have two subnets on same physical interface: cat/etc/network/interfaces auto...

2. IP Networking

How to configure Full Cone NAT using iptables ?

Hi Experts; I want to find the right iptables commands combination to address the following need: - NEs are NATed thru the linux box (using iptables) towards the WAN cloud, where the NTP servers are situated. - In order to achieve redundancy, the NTP Servers are in a load balancing cluster...

3. Debian

Iptables Nat forward port 29070

Hello, the Nat and the forward worked on my debian server up to the reboot of machines. The following rules*: /sbin/iptables -t nat -A PREROUTING -p tcp -i eth2 -d xxx.xxx.xxx.xxx --dport 29070 -j DNAT --to-destination 10.0.1.7:29070 /sbin/iptables -A FORWARD -p tcp -i eth2 -o eth0 -d...

4. IP Networking

iptables NAT prerouting & postrouting

Good morning, I'm a newbie of iptables and as far as I've seen on tutorials on the Internet it seems that both prerouting and postrouting NAT chains are undergone both by a packet that goes from an internal LAN to the Internet and of a one that goes in the opposite direction (from the Internet to...

5. Red Hat

NAT Loopback and iptables

Hello, please can you help and explain me. I have two servers. Both are RHEL6. I use the first one like router and the second one for apache. Router forwards 80 port on the second server and I can open that from the internet (mysite.com, for example). But I can not open mysite.com if i try to...

6. Cybersecurity

iptables in a NAT scenario

Hi, I am learning IPTables have this question. My server is behind a firewall that does a PAT & NAT to the LAN address. Internet IP: 68.1.1.23 Port: 10022 Server LAN IP: 10.1.1.23 port: 22 Allowed Internet IPs: 131.1.1.23, 132.1.1.23 I want to allow a set of IPs are to be able to...

7. IP Networking

Debugging NAT / prerouting issues (iptables)

Hello, Recently I discovered an issue with packet routing in the latest Android releases (4.4+ KitKat & Lollipop). It seems that the problem Android specific, but essentially it comes from the Linux kernel. I already filed a bug report to Google. You can see the details by searching for...

8. IP Networking

NAT via iptables - Won't work!!

Hi guys I'm running on debian on a small embedded system. I have a ppp interface that is connected to the internet (and works). My unit also has wifi access point (which works and I can connect to it). I want to allow connections to the wifi to be able to use the internet from ppp0...

9. UNIX for Dummies Questions & Answers

Soft and hard limits for nproc value in /etc/security/limits.conf file (Linux )

OS version : RHEL 6.5 Below is an excerpt from /etc/security/limits.conf file for OS User named appusr in our server appusr soft nproc 2047 appusr hard nproc 16384 What will happen if appusr has already spawned 2047 processes and wants to spawn 2048th process ? I just want to know...

10. Cybersecurity

Openvpn nat and iptables

good day good people hi first to tell that firewall and vpn is working as expected, but I notice something strange. I have host system 11.11.11.11(local ip) firewall is blocking everything except port to vpn. I have vpn on virtualized system 22.22.22.22 (CentOS both host and virtual). ...

LEARN ABOUT MOJAVE

tc-xt

iptables action in tc(8)                                               Linux                                              iptables action in tc(8)

NAME

       xt - tc iptables action

SYNOPSIS

       tc ... action xt -j TARGET [ TARGET_OPTS ]

DESCRIPTION

       The xt action allows to call arbitrary iptables targets for packets matching the filter this action is attached to.

OPTIONS

       -j TARGET [ TARGET_OPTS ]
              Perform a jump to the given iptables target, optionally passing any target specific options in TARGET_OPTS.

EXAMPLES

       The  following  will  attach a u32 filter to the ingress qdisc matching ICMP replies and using the xt action to make the kernel yell 'PONG'
       each time:

              tc qdisc add dev eth0 ingress
              tc filter add dev eth0 parent ffff: proto ip u32 
                   match ip protocol 1 0xff 
                   match ip icmp_type 0 0xff 
                   action xt -j LOG --log-prefix PONG

SEE ALSO

       tc(8), tc-u32(8), iptables-extensions(8)

iproute2                                                            3 Mar 2016                                            iptables action in tc(8)

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

iptables internal NAT with two public IP

Discussion started by: sincity2006

2. IP Networking

How to configure Full Cone NAT using iptables ?

Discussion started by: lvl1s7a

3. Debian

Iptables Nat forward port 29070

Discussion started by: titoms

4. IP Networking

iptables NAT prerouting & postrouting

Discussion started by: giac85