Kategoriarkiv: Networking

Run central syslog

Udgivet den juli 10, 2004 af mike

Keep your logs safe from attackers by storing them remotely. Once an intruder has gained entry into one of your systems, how are you to know when or if this has happened? By checking your logs, of course. What if … Læs resten →

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SFS Secure Filesharing on unix

Udgivet den juli 10, 2004 af mike

Use SFS to help secure your remote filesystems. If you are using Unix systems and sharing files on your network, you are most likely using NFS. However, there are a lot of security problems, not only with individual implementations, but … Læs resten →

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Chrooting named

Udgivet den juli 10, 2004 af mike

Lock down your BIND setup to help contain potential security problems. Due to BIND’s not-so-illustrious track record with regard to security, you’ll probably want to spend some time hardening your setup if you want to continue using it. One way … Læs resten →

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Apache security – ssl, suexec

Udgivet den juli 10, 2004 af mike

Help secure your web applications with mod_ssl and suEXEC. Web server security is a very important issue these days, especially since people are always finding new and creative ways to put the Web to use. If you’re using any sort … Læs resten →

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OS Fingerprint protection

Udgivet den juli 10, 2004 af mike

Keep outsiders on a need-to-know basis regarding your operating systems. When performing network reconnaissance, one very valuable piece of information for would-be attackers is the operating system running on each system discovered in their scans. From an attacker’s point of … Læs resten →

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Distribute your CA to clients

Udgivet den juli 10, 2004 af mike

Be sure all of your clients trust your new Certificate Authority. Once you have created a Certificate Authority (CA) [Hack #45], any certificates that are signed by your CA will be trusted by any program that trusts your CA. To … Læs resten →

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Fool Remote operating system detection software on linux with iptables

Udgivet den juli 10, 2004 af mike

Evade remote OS detection attempts by disguising your TCP/IP stack. Another method to thwart operating system detection attempts is to modify the behavior of your system’s TCP/IP stack and make it emulate the behavior of another operating system. This may … Læs resten →

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MAC Filtering with iptables

Udgivet den juli 10, 2004 af mike

Keep unwanted machines off your network with MAC address whitelisting Media Access Control (MAC) address filtering is a well-known method for protecting wireless networks. This type of filtering works on the default deny principle: you specify the hosts that are … Læs resten →

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Authenticated Gateway with OpenBSD

Udgivet den juli 10, 2004 af mike

Use PF to keep unauthorized users off the network. Firewalling gateways have traditionally been used to block traffic from specific services or machines. Instead of watching IP addresses and port numbers, an authenticated gateway allows you to regulate traffic to … Læs resten →

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Simple firewall with openbsd

Udgivet den juli 9, 2004 af mike

Use OpenBSD’s firewalling features to protect your network. PacketFilter, commonly known as PF, is the firewalling system available in OpenBSD. While it is a relatively new addition to the operating system, it has already surpassed IPFilter, the system it has … Læs resten →

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