spoof
Opening up a whole interface to incoming packets may not be restrictive enough and you may want more control as to what to allow and what to reject. Lets suppose we have a small network of computers that use the 192.168.0.x private subnet. We can open up our firewall to incoming packets from a single [...]
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Somewhat similarly to Open Mail Relays, Open DNSs are not a good thing in this modern world. What used to be a friendly and neighbourly action, an Open DNS, may now be – inadvertently – placing yourself and others at risk for three major reasons
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How to know which port is open from unmanaged remote host? How to determine running application and services from remote host? How to do basic port scanning against a host? How to confirm ports opened from remote host? Here are a several ways to do port scanning and know which port/services are currently opened from [...]
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Yes. To enable the antispoofing feature on the PIX Firewall, issue the ip verify reverse-path interface int_name command. Note: This feature requires that all internal networks have routes to them on the PIX, and that a default route is also set. An example is shown below. ip verify reverse-path interface outside
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