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Wikipedia administrators can choose to block a range of IP addresses rather than just a single one. This is done if a vandal, sockpuppeteer or otherwise disruptive user has taken advantage of dynamic IP or other situation (such as some LANs ) where it is possible to evade blocks by hopping from IP to IP or physically moving from one terminal to ...
Some large / 8 blocks of IPv4 addresses, the former Class A network blocks, are assigned in whole to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority (IANA), or a regional Internet registry.
Unix-like operating systems commonly implement IP address blocking using a TCP wrapper, configured by host access control files /etc/hosts.deny and /etc/hosts.allow.. Both companies and schools offering remote user access use Linux programs such as DenyHosts or Fail2ban for protection from unauthorized access while allowing permitted remote access.
However, IP addresses should almost never be indefinitely blocked. Many IP addresses are dynamically assigned and change frequently from one person to the next, and even static IP addresses are periodically reassigned or have different users. In cases of long-term vandalism from an IP address, consider blocks over a period of months or years ...
In order to stop an ongoing vandalism spree from (a) T-Mobile user(s), it is often necessary to block not just one IPv6 address, but an entire range of them. Since neither our software nor our administrators can easily distinguish an innocent user from an anonymous vandal, we strongly encourage you to create an account on a desktop or laptop ...
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 network Used for local communications within a private network [3] 192.0.0.0/24 192.0.0.0–192.0.0.255 256
Problem with your editing or Wikipedia behavior (under any account or IP address) - your account or a connected IP has been used in a problematic way or there is a concern about your editing. Problem with your username - your username was unsuitable and has been blocked; you need to choose another before continuing.
iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall, implemented as different Netfilter modules. The filters are organized in a set of tables, which contain chains of rules for how to treat network traffic packets.