Internet Engineering Task Force (IETF)M. Nottingham
Request for Comments: 7838Akamai
Category: Standards TrackP. McManus
ISSN: 2070-1721Mozilla
J. Reschke
greenbytes
April 2016

wie suchen männer frauen aus HTTP Alternative Services

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männer suchen frauen nach mutter aus This document specifies "Alternative Services" for HTTP, which allow an origin's resources to be authoritatively available at a separate network location, possibly accessed with a different protocol configuration.yahoo canada free chat rooms

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junge männer suchen alte frauen This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.online dating wann treffen

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brasilianische frauen partnersuche Copyright © 2016 IETF Trust and the persons identified as the document authors. All rights reserved.how to open yahoo chat room in pakistan 2013

partnersuche bei frauen This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (partnersuche kostenlos österreich zeitung) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.single alleinerziehend partnersuche


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partnersuche frauen israel This specification defines a new concept in HTTP, "Alternative Services", that allows an origin server to nominate additional means of interacting with it on the network. It defines a general framework for this in single mit kind sucht single mit kind, along with specific mechanisms for advertising their existence using HTTP header fields (single mit kind sucht orf kandidaten) or HTTP/2 frames (partnersuche online österreich jobs), plus a way to indicate that an alternative service was used (free chat lines in ontario california).free trial chat lines ontario

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partnersuche frauen indonesien The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119].seriöse partnervermittlung schweiz jobs

intelligente frauen partnersuche This document uses the Augmented BNF defined in [RFC5234] and updated by [RFC7405] along with the "#rule" extension defined in chat online ohne anmeldung 2000 of [RFC7230]. The rules below are defined in [RFC5234], [RFC7230], and [RFC7234]:chat ohne anmeldung 2000

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indien frauen partnersuche This specification defines a new concept in HTTP, the "Alternative Service". When an origin [RFC6454] has resources that are accessible through a different protocol/host/port combination, it is said to have an alternative service available.free live chat support tool

singles in meiner nähe kostenlos An alternative service can be used to interact with the resources on an origin server at a separate location on the network, possibly using a different protocol configuration. Alternative services are considered authoritative for an origin's resources, in the sense of [RFC7230], ist partnersuche de kostenlos xp.online canada chat rooms

partnersuche linz land reisepass For example, an origin:

("http", "www.example.com", "80")

free dating sites in american might declare that its resources are also accessible at the alternative service:

("h2", "new.example.com", "81")

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free dating sites in arab Alternative services do not replace or change the origin for any given resource; in general, they are not visible to the software "above" the access mechanism. The alternative service is essentially alternative routing information that can also be used to reach the origin in the same way that DNS CNAME or SRV records define routing information at the name resolution level. Each origin maps to a set of these routes — the default route is derived from the origin itself and the other routes are introduced based on alternative-service information.ist partnersuche de kostenlos chip

free dating sites in america Furthermore, it is important to note that the first member of an alternative service tuple is different from the "scheme" component of an origin; it is more specific, identifying not only the major version of the protocol being used, but potentially the communication options for that protocol as well.chat ohne anmeldung und registrierung österreich

partnersuche ulm kostenlos online This means that clients using an alternative service can change the host, port, and protocol that they are using to fetch resources, but these changes MUST NOT be propagated to the application that is using HTTP; from that standpoint, the URI being accessed and all information derived from it (scheme, host, and port) are the same as before.chat ohne anmelden und registrieren österreich

partnersuche frauen aus dem osten Importantly, this includes its security context; in particular, when TLS [RFC5246] is used to authenticate, the alternative service will need to present a certificate for the origin's host name, not that of the alternative. Likewise, the Host header field ([RFC7230], partnersuche online österreich youtube) is still derived from the origin, not the alternative service (just as it would if a CNAME were being used).chat rooms barrie ontario

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partnersuche frauen deutschland The ALPN protocol name is used to identify the application protocol or suite of protocols used by the alternative service. Note that for the purpose of this specification, an ALPN protocol name implicitly includes TLS in the suite of protocols it identifies, unless specified otherwise in its definition. In particular, the ALPN name "http/1.1", registered by partnerbörse für singles mit hund of [RFC7301], identifies HTTP/1.1 over TLS.seriöse partnervermittlung schweiz youtube

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beste gratis singlebörse deutschland There are many ways that a client could discover the alternative service(s) associated with an origin. This document describes two such mechanisms: the "Alt-Svc" HTTP header field (singles im alltag kennenlernen) and the "ALTSVC" HTTP/2 frame type (singles kennenlernen augsburg).singles kennenlernen auf facebook

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free dating sites in ethiopia For example, if the origin's host is "www.example.com" and an alternative is offered on "other.example.com" with the "h2" protocol, and the certificate offered is valid for "www.example.com", the client can use the alternative. However, if either is offered with the "h2c" protocol, the client cannot use it, because there is no mechanism (at the time of the publication of this specification) in that protocol to establish the relationship between the origin and the alternative.online dating erstes date begrüßung

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free german dating sites in english Mechanisms for discovering alternative services also associate a freshness lifetime with them; for example, the Alt-Svc header field uses the "ma" parameter.online dating kostenlos nrw

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singles in ihrer nähe Clients with existing connections to an alternative service do not need to stop using it when its freshness lifetime ends; the caching mechanism is intended for limiting how long an alternative service can be used for establishing new connections, not limiting the use of existing ones.online dating hamburg kostenlos

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partnersuche spanische frauen When alternative services are used to send a client to the most optimal server, a change in network configuration can result in cached values becoming suboptimal. Therefore, clients SHOULD remove from cache all alternative services that lack the "persist" flag with the value "1" when they detect such a change, when information about network state is available.partnerbörse 40 plus anleitung

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partnersuche schweden frauen A client MUST NOT use a TLS-based alternative service unless the client supports TLS Server Name Indication (SNI). This supports the conservation of IP addresses on the alternative service host.partnersuche frau sucht frau lena

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frauen suchen männer luzern If a client becomes aware of multiple alternative services, it chooses the most suitable according to its own criteria, keeping security properties in mind. For example, an origin might advertise multiple alternative services to notify clients of support for multiple versions of HTTP.party date online anschauen kostenlos

frauen suchen männer linz A client configured to use a proxy for a given request SHOULD NOT directly connect to an alternative service for this request, but instead route it through that proxy.online dating kostenlos ab 16

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frauen suchen männer leipzig The client does not need to block requests on any existing connection; it can be used until the alternative connection is established. However, if the security properties of the existing connection are weak (for example, cleartext HTTP/1.1), then it might make sense to block until the new connection is fully available in order to avoid information leakage.partnerbörse 40 plus bedienungsanleitung

frauen suchen männer in lüneburg Furthermore, if the connection to the alternative service fails or is unresponsive, the client MAY fall back to using the origin or another alternative service. Note, however, that this could be the basis of a downgrade attack, thus losing any enhanced security properties of the alternative service. If the connection to the alternative service does not negotiate the expected protocol (for example, ALPN fails to negotiate h2, or an Upgrade request to h2c is not accepted), the connection to the alternative service MUST be considered to have failed.seriöse partnervermittlung schweiz vergleich

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chinesische frauen partnersuche An HTTP(S) origin server can advertise the availability of alternative services to clients by adding an Alt-Svc header field to responses.partnersuche online österreich zeitung

Alt-Svc       = clear / 1#alt-value
clear         = %s"clear"; "clear", case-sensitive
alt-value     = alternative *( OWS ";" OWS parameter )
alternative   = protocol-id "=" alt-authority
protocol-id   = online dating frauen kostenlos ; percent-encoded ALPN protocol name
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frauen aus china partnersuche The field value consists either of a list of values, each of which indicates one alternative service, or the keyword "clear".ist partnersuche de kostenlos mahjong

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partnersuche linz land stellenausschreibung ALPN protocol names are octet sequences with no additional constraints on format. Octets not allowed in tokens ([RFC7230], jobs in partnervermittlung) MUST be percent-encoded as per frauen ab 40 partnersuche of [RFC3986]. Consequently, the octet representing the percent character "%" (hex 25) MUST be percent-encoded as well.partnerbörse 40 plus preisvergleich

frauen suchen männer thüringen In order to have precisely one way to represent any ALPN protocol name, the following additional constraints apply: partnerbörse 40 plus preis

  1. Octets in the ALPN protocol name MUST NOT be percent-encoded if they are valid token characters except "%", and
  2. When using percent-encoding, uppercase hex digits MUST be used.

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deutsche männer suchen tschechische frauen The "alt-authority" component consists of an OPTIONAL uri-host ("host" in stellenangebote partnervermittlung berlin of [RFC3986]), a colon (":"), and a port number.yahoo messenger mac web chat

deutsche frauen suchen türkische männer For example:

Alt-Svc: h2=":8000"

frauen suchen männer mit telefonnummer This indicates the "h2" protocol ([RFC7540]) on the same host using the indicated port 8000.

tunesische männer suchen deutsche frauen An example involving a change of host:

Alt-Svc: h2="new.example.org:80"

partnersuche thailändische frauen This indicates the "h2" protocol on the host "new.example.org", running on port 80. Note that the "quoted-string" syntax needs to be used because ":" is not an allowed character in "token".

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ALPN protocol nameprotocol-idNote
h2h2No escaping needed
w=x:y#zw%3Dx%3Ay#z"=" and ":" escaped
x%yx%25y"%" needs escaping

partnersuche ulm kostenlos runterladen Alt-Svc MAY occur in any HTTP response message, regardless of the status code. Note that recipients of Alt-Svc can ignore the header field (and are required to in some situations; see Sections yahoo messenger web chat rooms and vorteile und nachteile der partnersuche im internet).online dating deutschland kostenlos

gratis singlebörse deutschland legal The Alt-Svc field value can have multiple values:

Alt-Svc: h2="alt.example.com:8000", h2=":443"

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zwei männer suchen eine frau The delta-seconds value indicates the number of seconds since the response was generated for which the alternative service is considered fresh.casual dating deutschland xg

Alt-Svc: h2=":443"; ma=3600

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englische männer suchen deutsche frauen For example, a response:

HTTP/1.1 200 OK
Content-Type: text/html
Cache-Control: max-age=600
Age: 30
Alt-Svc: h2=":8000"; ma=60

erfolgreiche männer suchen frauen indicates that an alternative service is available and usable for the next 60 seconds. However, the response has already been cached for 30 seconds (as per the Age header field value); therefore, the alternative service is only fresh for the 30 seconds from when this response was received, minus estimated transit time.

männer suchen eine frau wie ihre mutter Note that the freshness lifetime for HTTP caching (here, 600 seconds) does not affect caching of Alt-Svc values.partnervermittlung jobsuche

männer suchen eine frau When an Alt-Svc response header field is received from an origin, its value invalidates and replaces all cached alternative services for that origin.partnersuche ohne registrierung schweiz jobs

reiche männer suchen eine frau By default, cached alternative services will be cleared when the client detects a network change. Alternative services that are intended to be longer lived (such as those that are not specific to the client access network) can carry the "persist" parameter with a value "1" as a hint that the service is potentially useful beyond a network configuration change.yourlove christliche singles münchen

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persist = "1"

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Alt-Svc: h2=":443"; ma=2592000; persist=1

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 +-------------------------------+-------------------------------+
 |         Origin-Len (16)       | Origin? (*)                 ...
 +-------------------------------+-------------------------------+
 |                   Alt-Svc-Field-Value (*)                   ...
 +---------------------------------------------------------------+

partnersuche russische frauen in deutschland ALTSVC Frame Payload

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Origin-Len:
An unsigned, 16-bit integer indicating the length, in octets, of the Origin field.
Origin:
An OPTIONAL sequence of characters containing the ASCII serialization of an origin ([RFC6454], partnersuche schwule männer) to which the alternative service is applicable.
Alt-Svc-Field-Value:
A sequence of octets (length determined by subtracting the length of all preceding fields from the frame length) containing a value identical to the Alt-Svc field value defined in online dating völlig kostenlos (ABNF production "Alt-Svc").

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free dating sites in london Receiving an ALTSVC frame is semantically equivalent to receiving an Alt-Svc header field. As a result, the ALTSVC frame causes alternative services for the corresponding origin to be replaced. Note that it would be unwise to mix the use of Alt-Svc header fields with the use of ALTSVC frames, as the sequence of receipt might be hard to predict.yourlove christliche singles chemnitz

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Alt-Used     = uri-host [ ":" port ]

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partnersuche wo frauen männer kaufen For example:

GET /thing HTTP/1.1
Host: origin.example.com
Alt-Used: alternate.example.net

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Header Field NameProtocolStatusReference
Alt-Svchttpstandardfrauen suchen männer.com
Alt-Usedhttpstandardfrauen suchen männer chur

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  • Parameter Name
  • Pointer to specification text

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kontaktbörse schweiz kostenlos Using an alternative service implies accessing an origin's resources on an alternative port, at a minimum. Therefore, an attacker that can inject alternative services and listen at the advertised port is able to hijack an origin. On certain servers, it is normal for users to be able to control some personal pages available on a shared port and also to accept requests on less-privileged ports.yourlove christliche singles wien

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rtl männer suchen frauen Note that this assurance is only as strong as the method used to authenticate the alternative service. In particular, when TLS authentication is used to do so, there are well-known exploits to make an attacker's certificate appear as legitimate.australische männer suchen deutsche frauen

männer suchen russische frauen Alternative services could be used to persist such an attack. For example, an intermediary could man-in-the-middle TLS-protected communication to a target and then direct all traffic to an alternative service with a large freshness lifetime so that the user agent still directs traffic to the attacker even when not using the intermediary.partnersuche linz land zulassungsstelle

männer suchen reiche frauen Implementations MUST perform any certificate-pinning validation (such as [RFC7469]) on alternative services just as they would on direct connections to the origin. Implementations might also choose to add other requirements around which certificates are acceptable for alternative services.partnersuche linz land fremdenpolizei

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partnersuche junge frauen ältere männer For example, if an "https://" URI has a protocol advertised that does not use some form of end-to-end encryption (most likely, TLS), this violates the expectations for security that the URI scheme implies. Therefore, clients cannot use alternative services blindly, but instead evaluate the option(s) presented to ensure that security requirements and expectations of specifications, implementations, and end users are met.frauen suchen junge männer zürich

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partnersuche japanische frauen Choosing an alternative service implies connecting to a new, server-supplied host name. By using unique names, servers could conceivably track client requests. Such tracking could follow users across multiple networks, when the "persist" flag is used.frauen suchen junge männer schweiz

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free dating sites in your area This affects not only the security properties of the connection itself, but also the state of the client at the other end of it; for example, a Web browser treats "https://" URIs differently than "http://" URIs in many ways, not just for purposes of protocol handling.frauen suchen männer zum kastrieren

free dating sites in yorkshire Since one of the uses of Alternative Services is to allow a connection to be migrated to a different protocol and port, these applications can become confused about the security properties of a given connection, sending information (for example, cookies and content) that is intended for a secure context (such as an "https://" URI) to a client that is not treating it as one.frauen suchen männer zum schwängern

free dating sites in new york This risk can be mitigated in servers by using the URI scheme explicitly carried by the protocol (such as ":scheme" in HTTP/2 or the "absolute form" of the request target in HTTP/1.1) as an indication of security context, instead of other connection properties ([RFC7540], frauen suchen männer zürich and [RFC7230], männer suchen frauen ohne vergangenheit).frauen suchen männer oberösterreich

free dating sites in york When the protocol does not explicitly carry the scheme (as is usually the case for HTTP/1.1 over TLS), servers can mitigate this risk by either assuming that all requests have an insecure context, or by refraining from advertising alternative services for insecure schemes (for example, HTTP).frauen suchen männer in osnabrück

frauen suchen männer online References

frauen sucht männer in ostfriesland Normative References

[RFC2119]
Bradner, S., “frauen suchen männer ohne geld”, BCP 14, RFC 2119, frauen suchen männer in oldenburg, March 1997, <deutsche männer suchen osteuropäische frauen>.
[RFC2818]
Rescorla, E., “partnersuche linz land wochenende”, RFC 2818, schweizer männer suchen frauen, May 2000, <männer suchen sich frauen die ihrer mutter ähneln>.
[RFC3986]
Berners-Lee, T., Fielding, R., and L. Masinter, “sendung männer suchen frauen”, STD 66, RFC 3986, serie männer suchen frauen im ausland, January 2005, <starke männer suchen starke frauen>.
[RFC5226]
Narten, T. and H. Alvestrand, “männer suchen schwache frauen”, BCP 26, RFC 5226, single männer suchen frauen, May 2008, <welche männer suchen starke frauen>.
[RFC5234]
Crocker, D., Ed. and P. Overell, “reiche männer suchen frau schweiz”, STD 68, RFC 5234, schwache männer suchen starke frauen, January 2008, <partnersuche im internet vorteile nachteile ytong>.
[RFC5890]
Klensin, J., “partnersuche linz land privat”, RFC 5890, partnersuche ulm kostenlos chip, August 2010, <partnersuche ravensburg umgebung freizeit>.
[RFC6066]
Eastlake, D., “partnersuche ravensburg umgebung sehenswürdigkeiten”, RFC 6066, app zeigt singles in der nähe, January 2011, <app um singles in der nähe zu finden>.
[RFC6454]
Barth, A., “gratis chat ohne anmeldung und registrierung”, RFC 6454, online partnersuche österreich zeitung, December 2011, <flirt app singles in der nähe>.
[RFC7230]
Fielding, R., Ed. and J. Reschke, Ed., “android app singles in der nähe”, RFC 7230, single in die nähe trier kostenlos, June 2014, <singles 50 kostenlos testen>.
[RFC7234]
Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., “online chat rooms ontario canada”, RFC 7234, partnerbörse 40 plus nebenwirkungen, June 2014, <partnerbörse 40 plus netzwerk>.
[RFC7301]
Friedl, S., Popov, A., Langley, A., and S. Emile, “verheiratete männer suchen frauen”, RFC 7301, frauen suchen männer in vorarlberg, July 2014, <gratis singlebörse deutschland indien>.
[RFC7405]
Kyzivat, P., “welche eigenschaften suchen männer bei frauen”, RFC 7405, frauen suchen männer bremen, December 2014, <wonach suchen männer bei frauen>.
[RFC7540]
Belshe, M., Peon, R., and M. Thomson, Ed., “frauen suchen männer bern”, RFC 7540, frauen suchen männer bonn, May 2015, <was suchen männer bei frauen>.

frauen suchen männer bayern Informative References

[BCP90]
Klyne, G., Nottingham, M., and J. Mogul, “frauen suchen männer bochum”, BCP 90, RFC 3864, September 2004, <gratis singlebörse deutschland meer>.
[RFC5246]
Dierks, T. and E. Rescorla, “free chat rooms in pakistan islamabad”, RFC 5246, free chat rooms in pakistan video, August 2008, <die zeit partnersuche wien>.
[RFC6265]
Barth, A., “partnervermittlung odessa tx”, RFC 6265, partnervermittlung odessa nachrichten, April 2011, <partnervermittlung odessa oktober>.
[RFC7469]
Evans, C., Palmer, C., and R. Sleevi, “partnervermittlung odessa opfer”, RFC 7469, partnersuche linz land veranstaltungen, April 2015, <partnersuche linz land verkehrsabteilung>.

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free dating sites in south yorkshire Thanks to Adam Langley, Bence Beky, Chris Lonvick, Eliot Lear, Erik Nygren, Guy Podjarny, Herve Ruellan, Lucas Pardue, Martin Thomson, Matthew Kerwin, Mike Bishop, Paul Hoffman, Richard Barnes, Richard Bradbury, Stephen Farrell, Stephen Ludin, and Will Chan for their feedback and suggestions.best online dating app free

free dating sites in york pa The Alt-Svc header field was influenced by the design of the Alternate-Protocol header field in SPDY.online dating apps free

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free dating site in yemen Mark Nottingham
Akamai
Email: [email protected]
URI: online dating app free
die zeit partnersuche vergleich Patrick McManus
Mozilla
Email: [email protected]
URI: jobs partnervermittlung berlin
partnersuche linz land kaufen Julian F. Reschke
greenbytes GmbH
Email: [email protected]
URI: reiche männer suchen arme frauen