Kategoriarkiv: Networking

Cross platform VPN

Udgivet den juli 10, 2004 af mike

Use OpenVPN to easily tie your networks together. Creating a VPN can be quite difficult, especially when dealing with clients using multiple platforms. Quite often, a single VPN implementation isn’t available for all of them. As an administrator, you can … Læs resten →

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Automatic vtund.conf configurator

Udgivet den juli 10, 2004 af mike

Generate a vtund.conf on the fly to match changing network conditions. If you’ve just come from [Hack #78], then the following script will generate a working vtund.conf for the client side automatically. If you haven’t read the previous hack (or … Læs resten →

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Tunnel with VTUN and SSH

Udgivet den juli 10, 2004 af mike

Connect two networks using VTun and a single SSH connection. VTun is a user-space tunnel server, allowing entire networks to be tunneled to each other using the tun universal tunnel kernel driver. An encrypted tunnel such as VTun allows roaming … Læs resten →

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Tunnel connections inside http

Udgivet den juli 10, 2004 af mike

Break through draconian firewalls by using httptunnel. If you’ve ever been on the road and found yourself in a place where the only connectivity to the outside world is through an incredibly restrictive firewall, you probably know the pain of … Læs resten →

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Using SSH as socks proxy

Udgivet den juli 10, 2004 af mike

Protect your web traffic using the basic VPN functionality built into SSH itself. In the search for the perfect way to secure their wireless networks, many people overlook one of the most useful features of SSH: the -D switch. This … Læs resten →

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Opportunistic Encryption with FreeS/WAN

Udgivet den juli 10, 2004 af mike

Use FreeS/WAN and DNS TXT records to automatically create encrypted connections between machines. One particularly cool feature supported by FreeS/WAN [Hack #67] is opportunistic encryption with other hosts running FreeS/WAN. This allows FreeS/WAN to transparently encrypt traffic between all hosts … Læs resten →

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PPTP Tunneling

Udgivet den juli 10, 2004 af mike

Set up quick and easy VPN access using the Point-to-Point Tunneling Protocol. The Point-to-Point Tunneling Protocol (PPTP) is basically a means to set up PPP tunnels [Hack #81] automatically without needing to manually start a PPP daemon on the remote … Læs resten →

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Set up IPSEC under linux

Udgivet den juli 10, 2004 af mike

Secure your traffic in Linux with FreeS/WAN. The most popular way of configuring IPsec connections under Linux is to use the FreeS/WAN (http://www.freeswan.org) package. FreeS/WAN is made up of two components, KerneL IP Security (KLIPS) and pluto. KLIPS is the … Læs resten →

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Set up IPSEC under freebsd

Udgivet den juli 10, 2004 af mike

Use FreeBSD’s built-in IPsec support to secure your traffic. Using IPsec with IKE under FreeBSD requires enabling IPsec in the kernel and installing a user-land program, racoon, to handle the IKE negotiations. You’ll need to make sure that your kernel … Læs resten →

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Sniff the ether remotely

Udgivet den juli 10, 2004 af mike

Monitor your networks remotely with rpcapd. If you’ve ever wanted to monitor network traffic from another segment and use a graphical protocol analyzer like Ethereal (http://www.ethereal.com), you know how time-consuming it can be. First you have to capture the data. … Læs resten →

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