Reverse-path forwarding (original) (raw)
Reverse path forwarding (RPF) ist eine Technik, welche in modernen Routern Verwendung findet. Sie ermöglicht ein kreisfreies Weiterleiten von Multicast-Paketen in Multicast-Routing und hilft, IP-Adressen-Spoofing in Unicast-Routing zu verhindern.
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| dbo:abstract | Reverse path forwarding (RPF) ist eine Technik, welche in modernen Routern Verwendung findet. Sie ermöglicht ein kreisfreies Weiterleiten von Multicast-Paketen in Multicast-Routing und hilft, IP-Adressen-Spoofing in Unicast-Routing zu verhindern. (de) Reverse path forwarding (RPF) es una técnica usada en ruteadores modernos con el fin de garantizar reenvío libre de bucles de paquetes de multidifusión de enrutamiento multicast y para ayudar a prevenir la suplantación de direcciones IP en el enrutamiento unicast. (es) Reverse-path forwarding (RPF) is a technique used in modern routers for the purposes of ensuring loop-free forwarding of multicast packets in multicast routing and to help prevent IP address spoofing in unicast routing. In standard unicast IP routing, the router forwards the packet away from the source to make progress along the distribution tree and prevent routing loops. In contrast, the router's multicast forwarding state runs more logically by organizing tables based on the reverse path, from the receiver back to the root of the distribution tree at the source of the multicast. This approach is known as reverse-path forwarding. (en) Le reverse path forwarding (RPF) est une technique utilisée dans le multicast pour limiter l'inondation des paquets dans le réseau. Il consiste à ignorer un paquet s'il ne provient pas de l'interface que le routeur aurait utilisé pour router la source du paquet. Un mécanisme semblable, appelé unicast RPF (uRPF) est décrit dans la pour filtrer les paquets en comparant la source à la table de routage, afin de limiter l'usurpation d'adresse IP et les attaques par déni de service. Ceci implique un routage symétrique, ce qui est en général le cas pour les utilisateurs particuliers. (fr) Reverse path forwarding （リバースパスフォワーディング、RPF）は、IPネットワークでマルチキャストパケットを転送するためのアルゴリズムのひとつである。マルチキャストルーティングではパケットをルーティング・ループを起こすことなく転送でき、ユニキャストルーティングではIPアドレススプーフィングを防止できる。2012年2月現在、シスコシステムズ、ジュニパーネットワークス、ヤマハ、アライドテレシスがRPFに対応するルーターを発売している。 (ja) Reverse path forwarding, in sigla RPF (in italiano: percorso di spedizione al rovescio) è una tecnica usata nei moderni router con lo scopo di assicurare un cammino di pacchetti multicast privi di loop (pacchetti che ritornano sempre allo stesso nodo) nell'instradamento multicast e ad aiutare a prevenire nell'instradamento unicast l'IP spoofing (falsificazione dell'indirizzo del mittente). L'idea che regola questa tecnica, che appartiene alla modalità di instradamento basata sul , ovvero di cascata controllata, è semplice.Nella rete il singolo router Multicast che riceve un pacchetto da un altro router Multicast sender, ha più collegamenti d'ingresso. Tra tutti i collegamenti di ingresso e di uscita, ci sono quelli che appartengono all'albero a costo minimo. Allora quando riceve, solo se il pacchetto è pervenuto al router su un collegamento appartenente all'albero a costo minimo, invia il pacchetto broadcast a tutti i suoi collegamenti d'uscita tranne a quello, ovviamente, sul quale ha ricevuto (che ritornerebbe indietro). Se un pacchetto non arriva da un collegamento appartenente all'albero a costo minimo, viene scartato, così da evitare che copie uguali del pacchetto defluiscano più volte nello stesso nodo. (it) 逆向路径转发（英語：Reverse path forwarding，简称RPF）是為路由器傳輸多播封包時確保一個無迴圈環境、以及在傳輸單播封包時防止IP地址欺騙的一種技術。 (zh) |
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| rdfs:comment | Reverse path forwarding (RPF) ist eine Technik, welche in modernen Routern Verwendung findet. Sie ermöglicht ein kreisfreies Weiterleiten von Multicast-Paketen in Multicast-Routing und hilft, IP-Adressen-Spoofing in Unicast-Routing zu verhindern. (de) Reverse path forwarding (RPF) es una técnica usada en ruteadores modernos con el fin de garantizar reenvío libre de bucles de paquetes de multidifusión de enrutamiento multicast y para ayudar a prevenir la suplantación de direcciones IP en el enrutamiento unicast. (es) Le reverse path forwarding (RPF) est une technique utilisée dans le multicast pour limiter l'inondation des paquets dans le réseau. Il consiste à ignorer un paquet s'il ne provient pas de l'interface que le routeur aurait utilisé pour router la source du paquet. Un mécanisme semblable, appelé unicast RPF (uRPF) est décrit dans la pour filtrer les paquets en comparant la source à la table de routage, afin de limiter l'usurpation d'adresse IP et les attaques par déni de service. Ceci implique un routage symétrique, ce qui est en général le cas pour les utilisateurs particuliers. (fr) Reverse path forwarding （リバースパスフォワーディング、RPF）は、IPネットワークでマルチキャストパケットを転送するためのアルゴリズムのひとつである。マルチキャストルーティングではパケットをルーティング・ループを起こすことなく転送でき、ユニキャストルーティングではIPアドレススプーフィングを防止できる。2012年2月現在、シスコシステムズ、ジュニパーネットワークス、ヤマハ、アライドテレシスがRPFに対応するルーターを発売している。 (ja) 逆向路径转发（英語：Reverse path forwarding，简称RPF）是為路由器傳輸多播封包時確保一個無迴圈環境、以及在傳輸單播封包時防止IP地址欺騙的一種技術。 (zh) Reverse-path forwarding (RPF) is a technique used in modern routers for the purposes of ensuring loop-free forwarding of multicast packets in multicast routing and to help prevent IP address spoofing in unicast routing. (en) Reverse path forwarding, in sigla RPF (in italiano: percorso di spedizione al rovescio) è una tecnica usata nei moderni router con lo scopo di assicurare un cammino di pacchetti multicast privi di loop (pacchetti che ritornano sempre allo stesso nodo) nell'instradamento multicast e ad aiutare a prevenire nell'instradamento unicast l'IP spoofing (falsificazione dell'indirizzo del mittente). (it) |
| rdfs:label | Reverse Path Forwarding (de) Reverse path forwarding (es) Reverse path forwarding (fr) Reverse path forwarding (it) Reverse path forwarding (ja) Reverse-path forwarding (en) 逆向转发 (zh) |
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