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User accounting in next generation networks
Grégr, Matěj ; Pustka,, Martin (oponent) ; Satrapa,, Pavel (oponent) ; Švéda, Miroslav (vedoucí práce)
The number of devices connected to the Internet is such enormous that it is impossible to assign a globally unique address to every device in today’s TCP/IPv4 architecture. Since the discussion how to solve the problem began in 1990s, there has been several proposals of new protocols and architectures trying to solve the problem. However, the only proposal that is widely deployed today is the IPv6 protocol. The IPv6 protocol enlarges the network address size, thus, it is possible to assign a globally unique IPv6 address to unlimited number of devices. Furthermore, the protocol introduces a paradigm shift, especially for address assignment and length of the IPv6 header. The IPv6 protocol is, however, incompatible with IPv4. To overcome the limitation, several transition mechanisms were proposed. The thesis discusses issues introduced by IPv6 protocol to user accounting process. In particular, it focuses on new approaches that can eliminate problems of current accounting methods that use NetFlow or IPFIX protocols. The aim of the thesis is to solve user accounting process for networks running a transition mechanism or a network address translation. Part of the thesis discusses the global IPv6 deployment and measures IPv6 penetration among content providers, internet service providers and transit operators.
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Port Block Allocation for Network Address Translation
Odehnal, Tomáš ; Podermański, Tomáš (oponent) ; Grégr, Matěj (vedoucí práce)
This term project aims to study the issue of the Carrier-Grade NAT (CGN) technique, which has to create log messages with address translation for every new connection. Because the CGN is stationed between large networks, it may daily record hundreds of thousands of connections. This amount of records have high memory requirements and even more difficult is to search for a specific log record. These problems solve the port block allocation for address translation. The output of this work is the creation of a rule in the iptables that performs this port block allocation for address translation. It consists of a user part that processes the rules and a kernel module that implements the functionality of the rule.
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Port Block Allocation for Network Address Translation
Odehnal, Tomáš ; Podermański, Tomáš (oponent) ; Grégr, Matěj (vedoucí práce)
This term project aims to study the issue of the Carrier-Grade NAT (CGN) technique, which has to create log messages with address translation for every new connection. Because the CGN is stationed between large networks, it may daily record hundreds of thousands of connections. This amount of records have high memory requirements and even more difficult is to search for a specific log record. These problems solve the port block allocation for address translation. The output of this work is the creation of a rule in the iptables that performs this port block allocation for address translation. It consists of a user part that processes the rules and a kernel module that implements the functionality of the rule.
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User accounting in next generation networks
Grégr, Matěj ; Pustka,, Martin (oponent) ; Satrapa,, Pavel (oponent) ; Švéda, Miroslav (vedoucí práce)
The number of devices connected to the Internet is such enormous that it is impossible to assign a globally unique address to every device in today’s TCP/IPv4 architecture. Since the discussion how to solve the problem began in 1990s, there has been several proposals of new protocols and architectures trying to solve the problem. However, the only proposal that is widely deployed today is the IPv6 protocol. The IPv6 protocol enlarges the network address size, thus, it is possible to assign a globally unique IPv6 address to unlimited number of devices. Furthermore, the protocol introduces a paradigm shift, especially for address assignment and length of the IPv6 header. The IPv6 protocol is, however, incompatible with IPv4. To overcome the limitation, several transition mechanisms were proposed. The thesis discusses issues introduced by IPv6 protocol to user accounting process. In particular, it focuses on new approaches that can eliminate problems of current accounting methods that use NetFlow or IPFIX protocols. The aim of the thesis is to solve user accounting process for networks running a transition mechanism or a network address translation. Part of the thesis discusses the global IPv6 deployment and measures IPv6 penetration among content providers, internet service providers and transit operators.
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