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Access restrictions based on IP address
IP address blocking or IP banning is a configuration of a network service that blocks requests from hosts with certain IP addresses. It is commonly used
IP_address_blocking
Method for IP address allocation and routing
allocating IP addresses for IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the previous classful network addressing architecture
Classless Inter-Domain Routing
Classless_Inter-Domain_Routing
Each /8 block contains 2563 = 224 = 16,777,216 addresses, which covers the whole range of the last three delimited segments of an IP address. This means
List of assigned /8 IPv4 address blocks
List_of_assigned_/8_IPv4_address_blocks
Depletion of unallocated IPv4 addresses
successor protocol, IPv6. IPv4 and IPv6 coexist on the Internet. The IP address space is managed globally by the Internet Assigned Numbers Authority (IANA)
IPv4_address_exhaustion
Leading case
evade eBay's IP address blocks. Information requests sent through such servers cannot easily be traced back to the originating IP Address, which allowed
EBay_v._Bidder's_Edge
Topics referred to by the same term
assigned to an organization or country IP address blocking, the banning of outside connections from certain IP addresses or ranges of them Semiconductor intellectual
IP_block
Restriction on accessing an online resource
Poisoning". DNS blocking can be applied to individual domain names or all their sub domains. Another form of content blocking is IP address blocking, where servers
DNS_blocking
Determining the physical location of internet user
localizing a device connected to the internet. For example, the device's IP address can be used to determine the country, city, or ZIP code, determining its
Internet_geolocation
Numerical label used to identify a network interface in an IP network
Hostname IP address blocking IP address spoofing IP aliasing IP multicast List of assigned /8 IPv4 address blocks Reverse DNS lookup Virtual IP address WHOIS
IP_address
reserved various IP addresses for special purposes. IPv4 designates special usage or applications for various addresses or address blocks: IPv6 assigns special
List_of_reserved_IP_addresses
Network address usable for communication within a subnet
Link-local addresses are typically assigned automatically through a process known as link-local address autoconfiguration, also known as auto-IP, automatic
Link-local_address
Creating IP packets using a false IP address
computer networking, IP address spoofing or IP spoofing is the creation of Internet Protocol (IP) packets with a false source IP address, for the purpose
IP_address_spoofing
Security technique to block VPN systems
access by blocking access from IP addresses and IP address ranges that are known to belong to VPN providers. Some governments have been known to block all access
VPN_blocking
Internet censorship based upon geographical location
In a geo-blocking scheme, the user's location is determined using Internet geolocation techniques, such as checking the user's IP address against a blacklist
Geo-blocking
Label to identify a network interface of a computer or other network node
network using IPv6. IP addresses are included in the packet header to indicate the source and the destination of each packet. The IP address of the destination
IPv6_address
Restriction on accessing an online resource
Internet censorship Access control IP address blocking Shadow banning DNS blocking Westfall, Joseph (2012). "Internet Blocking". Association of Internet Research
Block_(Internet)
Block of IP addresses assigned to an organization
A provider-independent address space (PI) is a block of IP addresses assigned by a regional Internet registry (RIR) directly to an end-user organization
Provider-independent address space
Provider-independent_address_space
Early system for organizing the IPv4 address space
method divides the IP address space for Internet Protocol version 4 (IPv4) into five address classes based on the leading four address bits. Classes A,
Classful_network
Network using private IP addresses
private network is a computer network that uses a private address space of IP addresses. These addresses are commonly used for local area networks (LANs) in
Private_network
Extension of a private network across a public one
network, computers are identified by network addresses, which allow rule-based systems such as Internet Protocol (IP) to locate and identify hosts. Hosts may
Virtual_private_network
Software company
2024. "Terminology and concepts". Tailscale. Retrieved August 17, 2024. "IP pool · Tailscale Docs". Tailscale. Retrieved August 17, 2024. "Troubleshoot
Tailscale
Virtual private network application
client side the normal private IP address blocks 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 are not used. The IP address assigned to the Hamachi client
LogMeIn_Hamachi
Configuration file for computer networking
performs a DNS lookup that can block the browser for a long time if the DNS server does not respond. The myIpAddress function has often been reported
Proxy_auto-config
Fourth version of the Internet Protocol
Suite. It gives the Internet a global-scale logical addressing system which allows the routing of IP data packets from a source host to the next router
IPv4
Logical subdivision of an IP network
IP network. The practice of dividing a network into two or more networks is called subnetting. Computers that belong to the same subnet are addressed
Subnet
Secure network protocol suite
32 bits Arbitrary value which is used (together with the destination IP address) to identify the security association of the receiving party. Sequence
IPsec
IP address block for route aggregation
Provider-aggregatable address space (PA) is a block of IP addresses assigned by a regional Internet registry to an Internet service provider which can
Provider-aggregatable address space
Provider-aggregatable_address_space
Version 6 of the Internet Protocol
Standard on 14 July 2017. Devices on the Internet are assigned a unique IP address for identification and location definition. With the rapid growth of the
IPv6
HTTP extension supporting TLS encryption
even on a correctly configured web server, eavesdroppers can infer the IP address and port number of the web server, and sometimes even the domain name
HTTPS
2013 Northern District of California Court case
The court held that sending a cease and desist letter and blocking a client's IP address are sufficient to qualify as notice under the Computer Fraud
Craigslist_Inc._v._3Taps_Inc.
April 2011. The technical measures used to block sites include DNS hijacking, DNS blocking, IP address blocking, and Deep packet inspection, making consistent
Web blocking in the United Kingdom
Web_blocking_in_the_United_Kingdom
Sending datagrams to multiple receivers
applications. It uses specially reserved multicast address blocks in IPv4 and IPv6. Protocols associated with IP multicast include Internet Group Management
IP_multicast
Freemium VPN service
use geo-blocking, the Hola application redirects the request to go through the computers and Internet connections of other users in non-blocked areas,
Hola_(VPN)
Open-source self-hosted VPN software
human rights activists from Roskomsvoboda. Amnezia VPN supports modern blocking bypass protocols and works even where other VPNs don't work - in Russia
Amnezia_VPN
Computer network protocol
registered users or assignees. These resources include domain names, IP address blocks and autonomous systems, but it is also used for a wider range of other
WHOIS
Computer network security technique
allowed number of addresses is exceeded. Wikiversity has learning resources about Port security Access-control list IP address blocking Private VLAN Guide
MAC_filtering
Virtual private network provider
proceedings against Yegor Sak, the CEO of Windscribe, because someone using an IP address that belonged to a Windscribe server in Finland had breached a server
Windscribe
Virtual private network provider
inspection Deep packet inspection IP address blocking Network enumeration Stateful firewall TCP reset attack VPN blocking VPN services Avast HMA SecureLine
Proton_VPN
Mobile operating system for iPad tablets
update also brought stricter privacy measurements with Safari such as IP Address blocking so other websites cannot see it. iPadOS 15 was released to the public
IPadOS
Topics referred to by the same term
batsman deflects the ball to avoid getting out Blocking (American football) Blocking (martial arts) Starting blocks, devices used by sprinters to assist in preventing
Block
Logical identifier addressing a specific group of devices on a network
Updates RFC 2780. IP Multicast Routing Configuration Guide, Cisco, retrieved 2021-01-13 AD-HOC Block 1 "IANA IP multicast addresses assignments". Internet
Multicast_address
Virtual private network provider
that will have to be stored. Mullvad does not log VPN users' IP addresses, the VPN IP address used, browsing-activity, bandwidth, connections, session duration
Mullvad
Virtual private network provider
censorship. NordVPN was reportedly given one month to comply, or face blocking by Russian authorities. The provider declined to comply with the request
NordVPN
Internet software utility
domain names to defeat IP blocking and DNS hijacking. On the backend, DynaWeb also has mechanisms to proactively monitor the blocking status of each of its
Freegate
IP packet on the public internet
A Martian packet is an IP packet seen on the public Internet that contains a source or destination address that is reserved for special use by the Internet
Martian_packet
Standards organization overseeing IP addresses
Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management
Internet Assigned Numbers Authority
Internet_Assigned_Numbers_Authority
Kernelvirtual network devices
OpenVPN, Ethernet/IP over TCP/UDP; encrypted, compressed ZeroTier, Ethernet/IP over TCP/UDP; encrypted, compressed, cryptographic addressing scheme FreeLAN
TUN/TAP
Virtual private network provider
PayPal, and Bitcoin. IVPN does not log VPN users' internet traffic, IP addresses, bandwidth, timestamps, and DNS requests. IVPN has various privacy features
IVPN
Restrictions to access on X by governments
election, the Iranian government blocked Twitter due to fear of protests being organized. In September 2013, the blocking of both Twitter and Facebook was
Censorship_of_X
Special purpose IPv4 network
shared address space is a block of Internet Protocol version 4 addresses for use by Internet service providers (ISPs) to alleviate the risk of address duplication
IPv4_shared_address_space
Free and open-source virtual private network software
certain network configuration options to the clients. These include IP addresses, routing commands, and a few connection options. OpenVPN offers two types
OpenVPN
Legal control of the internet
geopositioning, geo-blocking is normally implemented via IP address blocking. Domain name system (DNS) filtering and redirection: Connections to blocked domain names
Internet_censorship
Standard hostname for a networked device's loopback interface
distinguished from any other packets traversing the TCP/IP stack only by the special IP address they were addressed to. Thus, the services that ultimately receive
Localhost
Form of virtual private network tunnel
tunnels. SSTP suffers from the same performance limitations as any other IP-over-TCP tunnel. In general, performance will be acceptable only as long as
Secure Socket Tunneling Protocol
Secure_Socket_Tunneling_Protocol
Computer networking protocol
and hidden within the IPsec packet, the original source and destination IP address is encrypted within the packet. Also, it is not necessary to open UDP
Layer_2_Tunneling_Protocol
Free and open-source VPN protocol
25519, the public keys are exchanged, with each pair then assigned an IP address (generally RFC 1918) to utilize with the WireGuard tunnel. Once the keys
WireGuard
Informal term for the transfer of electronic information by physically moving media
Delay-tolerant networks, such as the Haggle project at Cambridge University. IP over Avian Carriers (RFC 1149), an April Fools' Day RFC describing the transmission
Sneakernet
Virtual private network provider
actual IP address will not be visible to the websites visited. Instead, the websites and/or computers would be able to see the spoofed IP address provided
TunnelBear
Virtual private network provider
The company concluded that the man had accessed PureVPN through two IP addresses: one from home and one from work. Max Eddy of PC Magazine noted that
PureVPN
Protocol to encrypt DNS queries
commercial DNS services to identify customers without having to rely on IP addresses. Queries and responses are encrypted using the same algorithm and padded
DNSCrypt
VPN service
inspection Deep packet inspection IP address blocking Network enumeration Stateful firewall TCP reset attack VPN blocking VPN services Avast HMA SecureLine
VPNBook
Principal protocol used to assign IPv4 addresses on an IPv4 network
management protocol used on Internet Protocol (IP) networks for automatically assigning IP addresses and other communication parameters to devices connected
Dynamic Host Configuration Protocol
Dynamic_Host_Configuration_Protocol
Free and open-source internet circumvention tool
2009 Fifield D.; Lan C.; Hynes R.; Wegmann P.; Paxson V. (2015-05-15). "Blocking-resistant communication through domain fronting". Proceedings on Privacy
Psiphon
Proxy server designed to bypass internet censorship
with normal web traffic to avoid third-party interference. DNS cache: FakeIP support, reducing DNS queries. V2Ray also supports DNS over HTTPS. Reverse
V2Ray
Free and open-source encrypted proxy project
2018. zhou0 (18 December 2017), shadowsocks-perl: An asynchronous, non-blocking shadowsocks client and server written in Perl, retrieved 11 January 2018{{citation}}:
Shadowsocks
Virtual private network provider
created to prevent Internet Relay Chat (IRC) channels from exposing user IP addresses. In 2018, former Mt. Gox CEO Mark Karpelès was appointed as the chief
Private_Internet_Access
Internet service for use by cyber-criminals
reports would result in takedowns to avoid their autonomous system's IP address block being blacklisted by other providers and by Spamhaus. BPH first became
Bulletproof_hosting
Chinese internet regulations
to the international internet. Because the Great Firewall blocks destination IP addresses and domain names and inspects the data being sent or received
Great_Firewall
Global system of connected computer networks
two principal name spaces on the Internet, the Internet Protocol address (IP address) space and the Domain Name System (DNS), are directed by a maintainer
Internet
Release of hacked data from Sony Pictures
level or consumer level internet service provider, to implement IP address blocking of pirate websites as well as linking websites. WikiLeaks republished
2014_Sony_Pictures_hack
Technique for Internet censorship circumvention
was blocked in April 2018 following a court ruling in Russia through ISP-blocking of the CDNs Telegram used as a front to evade blocks on its own IP addresses
Domain_fronting
Open-source VPN client and server software
configured to define IP packet filter entries to filter the packets through the Virtual Hub. A Virtual Layer-3 Switch has layer-3 IP static routing functions
SoftEther_VPN
Computer network protocol
connection, those modified GRE packets are directly encapsulated into IP packets, and seen as IP protocol number 47. The GRE tunnel is used to carry encapsulated
Point-to-Point Tunneling Protocol
Point-to-Point_Tunneling_Protocol
Free and open-source anonymity network based on onion routing
users can evade Internet censorship that relies upon blocking public Tor relays. Because the IP address of the sender and the recipient are not both in cleartext
Tor_(network)
Finding a domain name associated to an IP address
an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. The process of reverse resolving of an IP address uses
Reverse_DNS_lookup
Internet Protocol Security implementation
is possible. Automatic assignment of virtual IP addresses to VPN clients from one or several address pools using either the IKEv1 ModeConfig or IKEv2
StrongSwan
Free DNS service maintained by Cloudflare in partnership with APNIC
Tor clients via an onion address. Users can set up the service by manually changing their DNS resolvers to the IP addresses below. Cloudflare also offers
1.1.1.1
Virtual private network provider
determine if their VPN provider is leaking network traffic, DNS, or true IP addresses while connected to the VPN, such as when switching from a wireless to
ExpressVPN
Methods to bypass internet censorship
evade less sophisticated blocking tools by using alternate Domain Name System (DNS) servers, false IP addresses, or address lookup systems. However, such
Internet censorship circumvention
Internet_censorship_circumvention
Organization monitoring status of websites censored in China
economically costly for censors to block. The organization has since set up similar mirror sites for other blocked websites, such as Google and the New
GreatFire
Freeware Internet censorship circumvention product
proprietary anti-blocking technology to overcome filtering and censorship online. According to Wired magazine, UltraSurf changes the "IP addresses of their proxy
Ultrasurf
IPv4 address for multiple purposes
Internet Protocol Version 4 (IPv4) address 0.0.0.0 has multiple uses. The IP address 0.0.0.0 is used as a source address when the host is still in the process
0.0.0.0
Free and open source project building an anonymous network
message-based, like IP, but a library is available to allow reliable streaming communication on top of it (similar to Non-blocking IO-based TCP, although
I2P
Commercial service for proxied Internet access
obfuscate their physical location or IP address, typically as a means to evade Internet censorship or geo-blocking. Providers often market VPN services
VPN_service
Unique identifier assigned to network interfaces
Protocol (IP) networks, the MAC address of an interface corresponding to an IP address may be queried with the Address Resolution Protocol (ARP) for IPv4
MAC_address
Internet censorship circumvention software
purchase information) Connection logs (time stamps of connection of IP addresses from client to Lantern server) Browsing history Traffic destination or
Lantern_(software)
articles to be selectively blocked. GreatFire urged Wikipedia and users to circumvent the block by accessing other IP addresses owned by Wikipedia with HTTPS
Censorship_of_Wikipedia
"List of countries by IPv4 address allocation". nossl.sh. Retrieved 2026-01-11. Maez, Dave (11 December 2024). "IP Address Allocation by Country". impliedchaos
List of countries by IPv4 address allocation
List_of_countries_by_IPv4_address_allocation
Regional Internet registry for the Asia Pacific region
security framework used to verify the association between specific IP address blocks of ASNs and the holders of those Internet number resources. APNIC
APNIC
Criteria to control computer access
example, but not URLs. A firewall is well-suited for blocking IP addresses, but less so for blocking malicious files or passwords. Example uses include
Blacklist_(computing)
Virtual private network provider
the traffic between the user and the server from eavesdropping, and the IP address of the client is not exposed. While the service cannot make users completely
Hotspot_Shield
Mobile proxy client
intranet Censorship and blocking technologies IP address blocking DNS cache poisoning Wordfilter Great Firewall of China Blocks on specific websites Facebook
Shadowrocket
Peer to peer web hosting
open source. Instead of having an IP address, sites are identified by a public key (specifically a bitcoin address). The private key allows the owner
ZeroNet
Computer networking concept
network access control (NAC). A form of split-tunneling that derives the IP addresses to include/exclude at runtime-based on a list of hostname rules/policies
Split_tunneling
Telephone and internet service provider in Trinidad and Tobago
its tstt.net.tt email addresses due to a termination of service with G-mail.[2][3][4][5] The following IPv4 and IPv6 address blocks has been assigned to
Telecommunications Services of Trinidad and Tobago
Telecommunications_Services_of_Trinidad_and_Tobago
Regional Internet registry for Africa
Ocean, responsible for allocating and registering Internet Protocol (IP) addresses and autonomous system numbers (ASNs) in its service region. It also
AFRINIC
Website for online discussions
administrators will apply an IP address ban or block (this can also be applied at the server level): If the IP address is static, the machine of the
Internet_forum
USB device installed in a public space
files with another person secretly/anonymously, and they do not track any IP address or similar personally identifying information. Other benefits are more
USB_dead_drop
Virtual private network software
inspection Deep packet inspection IP address blocking Network enumeration Stateful firewall TCP reset attack VPN blocking VPN services Avast HMA SecureLine
Cisco_Systems_VPN_Client
TLS extension to serve multiple HTTPS sites
certificates on the same IP address and port number, allowing for multiple services (including HTTPS websites) to be served by the same IP address without using
Server_Name_Indication
travel, tourism, insurance
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travel, tourism, insurance