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  2. Reserved IP addresses - Wikipedia

    en.wikipedia.org/wiki/Reserved_IP_addresses

    Used for loopback addresses to the local host [1] 169.254.0.0/16 169.254.0.0–169.254.255.255 65 536: Subnet Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255 1 048 576: Private ...

  3. Dynamic Host Configuration Protocol - Wikipedia

    en.wikipedia.org/wiki/Dynamic_Host_Configuration...

    This message may contain the client's Client ID (Option 61, containing a unique value, traditionally a MAC address), the IP address that the server is offering, the subnet mask, the lease duration, and the IP address of the DHCP server making the offer. The DHCP server may also take notice of the hardware-level MAC address (as specified in the ...

  4. MikroTik - Wikipedia

    en.wikipedia.org/wiki/MikroTik

    MikroTik (officially SIA "Mikrotīkls") is a Latvian network equipment manufacturing company. MikroTik develops and sells wired and wireless network routers, network switches, access points, as well as operating systems and auxiliary software. The company was founded in 1996, and as of 2022, it was reported that the company employed 351 employees.

  5. Blacklist (computing) - Wikipedia

    en.wikipedia.org/wiki/Blacklist_(computing)

    Screenshot of a website blocking the creation of content which matches a regular expression term on its blacklist. In computing, a blacklist, disallowlist, blocklist, or denylist is a basic access control mechanism that allows through all elements (email addresses, users, passwords, URLs, IP addresses, domain names, file hashes, etc.), except those explicitly mentioned.

  6. Whitelist - Wikipedia

    en.wikipedia.org/wiki/Whitelist

    A whitelist or allowlist is a list or register of entities that are being provided a particular privilege, service, mobility, access or recognition. Entities on the list will be accepted, approved and/or recognized. Whitelisting is the reverse of blacklisting, the practice of identifying entities that are denied, unrecognized, or ostracized.

  7. MAC filtering - Wikipedia

    en.wikipedia.org/wiki/MAC_filtering

    In computer networking, MAC address filtering is a network access control method whereby the MAC address assigned to each network interface controller is used to determine access to the network. MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the ...

  8. ipchains - Wikipedia

    en.wikipedia.org/wiki/Ipchains

    Linux IP Firewalling Chains, normally called ipchains, is free software to control the packet filter or firewall capabilities in the 2.2 series of Linux kernels. It superseded ipfirewall (managed by ipfwadm command), but was replaced by iptables in the 2.4 series.

  9. Application-level gateway - Wikipedia

    en.wikipedia.org/wiki/Application-level_gateway

    In order for these protocols to work through NAT or a firewall, either the application has to know about an address/port number combination that allows incoming packets, or the NAT has to monitor the control traffic and open up port mappings (firewall pinholes) dynamically as required. Legitimate application data can thus be passed through the ...