Changes

=====Services de DNS dynamique=====

=====Services de DNS dynamique=====

If your IP address is assigned dynamically, you may find it helpful to use a dynamic DNS service. A dynamic DNS service provides you with an automated way to notify them whenever your IP address changes so that they can immediately publish new DNS records for your domain. Without dynamic DNS, you would have to contact your ISP to have them change your DNS records, and your web site and other services would be unavailable for several days until the change was processed. You can easily enable the usage of a dynamic DNS service by selecting it on your server console.

Si votre adresse IP est affectée dynamiquement, vous trouverez peut-être utile d'utiliser un service de DNS dynamique. Un service DNS dynamique vous offre un moyen automatisé pour avertir les services de DNS dynamique lorsque vous changez d'adresse IP afin qu'ils puissent immédiatement publier de nouveaux enregistrements DNS pour votre domaine. Sans les DNS dynamiques, vous devriez contacter votre fournisseur de services Internet pour changer vos enregistrements DNS, et votre site Web ainsi que les autres services ne seront pas disponible pendant plusieurs jours jusqu'à ce que le changement ait été traité. Vous pouvez utiliser facilement un service DNS dynamique en le sélectionnant dans la console de votre serveur.

Un service DNS dynamique peut être une excellente solution lorsqu'il est utilisé avec une connexion dédiée. Avec une connexion téléphonique classique, votre adresse IP change beaucoup plus souvent (peut-être à chaque fois que votre serveur se connecte) et, parce que le serveur se connecte uniquement par intermittence, il y a un retard dans la transmission au service DNS dynamique du changement de l'adresse IP. Cela signifie que le risque de faux renseignements  est beaucoup plus grande avec une connexion par modem. Pour cette raison, nous vous conseillons et soutenons l'utilisation des services DNS dynamiques que pour les connexions dédiées.<br />

A dynamic DNS service can be a great solution when used with a dedicated connection. With a typical dialup connection, your IP address changes much more frequently (possibly every time your server connects) and, because the server only connects intermittently, there is a delay in informing the dynamic DNS service of the change. This means that the risk of misdirected information is much greater with a dialup connection. For this reason, we recommend and support the use of dynamic DNS services only for dedicated connections.

Contribs.org a testé quatre services de DNS dynamiques, dont deux sont des services gratuits et deux sont des services commerciaux: yi.org (gratuit), dyndns.com (commercial), tzo.com (commercial) et dyndns.org (gratuit). Par souci de simplicité, nous avons préprogrammé le serveur pour travailler avec ces services (y compris les pré-installation de leur logiciel client). Si vous avez une affectation dynamique des adresses IP auprès de votre FAI et que vous souhaitez utiliser un de ces services, tout ce que vous devez faire est de visiter le site Web approprié pour vous inscrire pour le service, et de d'autoriser cette fonction particulière dans la console du serveur. En pré-configurant le serveur pour ces services particuliers, nous ne voulons en aucune manière vous empêcher d'utiliser un autre service de DNS dynamique si vous le souhaitez. Cependant cela nécessitera une configuration personnalisée de votre part.<br />

Contribs.org has tested four dynamic DNS services, of which two are free services and two are commercial services: yi.org (free), dyndns.com (commercial), tzo.com (commercial) and dyndns.org (free). For simplicity, we have preprogrammed the server to work with these services (including pre-installing their client software). If you have arranged dynamic IP address assignment from your ISP and you wish to use one of these services, all you need to do is visit the appropriate web site to sign up for service, and enable that particular function in the server console. In pre-configuring the server for this particular service, we in no way interfere with nor prevent you from using another dynamic DNS service if you wish. To do so, however, would require some customized configuration on your part.

Contribs.org a testé le fonctionnement de ces services avec notre logiciel. Toutefois, nous déclinons toute responsabilité pour tout manquement du service de leur part. Une défaillance de la part de votre service DNS dynamique peut entraîner que votre réseau devienne temporairement inaccessible depuis Internet. Pendant ces périodes, tous les services Web/mail pourront être non joignable.<br />

 

Contribs.org has tested the functionality of these services with our software. However, we accept no liability for any breach of service on their part. A failure on the part of your dynamic DNS service can result in your network becoming temporarily unreachable from the Internet. During these times, your e-mail may be undeliverable.

If your IP address is assigned dynamically and you intend to receive all your e-mail directly (rather than having it stored at an ISP and retrieving it via POP or IMAP), but you decide not to use a dynamic DNS service, you should implement multidrop e-mail as your e-mail solution as this will ensure that no e-mail is misdirected to another IP address (See Some important notes on Service list D (multidrop mail) in|Chapter 3.)

If your IP address is assigned dynamically and you intend to receive all your e-mail directly (rather than having it stored at an ISP and retrieving it via POP or IMAP), but you decide not to use a dynamic DNS service, you should implement multidrop e-mail as your e-mail solution as this will ensure that no e-mail is misdirected to another IP address (See Some important notes on Service list D (multidrop mail) in|Chapter 3.)

 

{{Note box|Dynamic DNS services are not perfect. They merely point hostnames to IP addresses. If your system receives an IP address via DHCP or PPPoE, it will automatically update the dynamic DNS service each time it comes online. However, when your server disconnects from the Internet, with most dynamic DNS services your server does not indicate that it is offline in any way to the dynamic DNS service. If your system is offline for a period of time, it is possible that someone else will be assigned your IP address by your ISP. If this occurs, with most dynamic DNS services this other system will now start receiving your e-mail and web page requests until your server comes back online and updates the service with your new IP address. There is not much you can do about this, but you should be aware of this fact if there is any chance your system will be offline for a long period of time.}}

{{Note box|Dynamic DNS services are not perfect. They merely point hostnames to IP addresses. If your system receives an IP address via DHCP or PPPoE, it will automatically update the dynamic DNS service each time it comes online. However, when your server disconnects from the Internet, with most dynamic DNS services your server does not indicate that it is offline in any way to the dynamic DNS service. If your system is offline for a period of time, it is possible that someone else will be assigned your IP address by your ISP. If this occurs, with most dynamic DNS services this other system will now start receiving your e-mail and web page requests until your server comes back online and updates the service with your new IP address. There is not much you can do about this, but you should be aware of this fact if there is any chance your system will be offline for a long period of time.}}