I have been looking for same thing and have found two tools! tmate – instant terminal sharing GoTTY – Share your terminal as a web application tmate: When you start tmate in your terminal it will create a ssh link that you can share with another party that you wish to allow connecting to your … Read more
Another interesting question that arises is of BitTorrent because they can work on any device and even behind a NAT. I am not able to get any explanation of how BitTorrent works. This statement looks like you assume that bittorrent needs full connectivity to operate. That is incorrect. Behind a NAT device you will still … Read more
PC —– Ubuntu 10 Server —– Slashdot (1.2.3.4) (5.6.7.8) (216.34.181.45) Enable the IP forwarding on Ubuntu: echo 1 > /proc/sys/net/ipv4/ip_forward and add the following rules: iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp –dport 8080 -j DNAT \ –to-destination 216.34.181.45:80 iptables -t nat -A POSTROUTING -o eth0 -j SNAT –to-source 5.6.7.8 No. … Read more
Debian (and derivatives) use the iptables-persistent package for this task. Define your rules in /etc/iptables/rules.4 and/or /etc/iptables/rules.6 and activate the service (using update-rc.d, chkconfig or your tool of choice. On RHEL and derivatives, the startup script /etc/init.d/iptables reads /etc/sysconfig/iptables, so you need to define your rules there, and ensure that the iptables service is activated … Read more
To set a linux machine as a router you need the following 1- Enable forwarding on the box with echo 1 > /proc/sys/net/ipv4/ip_forward Assuming your public interface is eth1 and local interface is eth0 2- Set natting the natting rule with: iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE 3- Accept traffic from eth0: … Read more
A TCP connection (which underlies HTTP and many other protocols) is uniquely (at a given point in time) defined by 4 parameters: The local IP The local port The remote IP The remote port Even if you make the same request twice simultaneously from the same computer, even with the two IP addresses identical and … Read more
There’s definitely some mechanisms in place to help you out here. For internal LAN traffic, between systems on your network, there’s Unique Local Addresses. Think of them like RFC1918 addresses; they’ll only work within your network. You’ll be able to use these addresses for any communication within your network borders; just carve off some nets … Read more
I am surprised that after almost 8 years, nobody has explained how to do this the correct way using the UCI configuration system used by default in OpenWRT. Steven Monday’s answer is correct, yet it is using iptables commands directly, which is a lower layer than the UCI configuration system, and is best left untouched … Read more
Due to the update of vzctl from 4.6 to 4.7 they changed the setting of nf_conntrack to be disabled by default. (https://openvz.org/Download/vzctl/4.7/changes) Corresponding commit message: … Disable conntrack for VE0 by default IP conntrack functionality has some negative impact on venet performance (uo to about 10%), so they better be disabled by default. … (Source: … Read more
Since release 1.3.0: Static IP can now be set on public networks. [GH-1745] you just have to put this configuration in your Vagrantfile (documentation): config.vm.network “public_network”, ip: “192.168.0.200” This Vagrant thing is really great 🙂