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| * SME has IP Address a.b.c.d | | * SME has IP Address a.b.c.d |
| * SME has domain name mysmeserver.com | | * SME has domain name mysmeserver.com |
− | * Remote_User is configured to use Other_DNS for DNS lookups | + | * '''Remote_User''' is configured to use '''Other_DNS''' for DNS lookups |
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− | If Remote_User tries to browse to http://mysmeserver.com, his computer asks Other_DNS how to find 'mysmeserver.com'. Other_DNS server then | + | If Remote_User tries to browse to http://mysmeserver.com, his computer asks '''Other_DNS''' how to find 'mysmeserver.com'. '''Other_DNS''' server then |
− | * asks the Root_DNS servers for the Registrar in charge of 'mysmeserver.com' | + | * asks the '''Root_DNS''' servers for the '''Registrar''' in charge of 'mysmeserver.com' |
− | * asks the Registrar for the DNS_Server that will answer queries about 'mysmeserver.com' | + | * asks the '''Registrar''' for the '''DNS_Server''' that will answer queries about 'mysmeserver.com' |
− | * asks the DNS_Server for the IP address of 'mysmeserver.com' | + | * asks the '''DNS_Server''' for the IP address of 'mysmeserver.com' |
− | * saves the answer in its local cache for the amount of time specified by the administrator of the DNS record at DNS_Server. | + | * saves the answer in its local cache for the amount of time specified by the administrator of the DNS record at '''DNS_Server'''. |
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− | If, on the other hand, Remote_User asks for information about your IP address (a.b.c.d), his DNS server | + | If, on the other hand, '''Remote_User''' asks for information about your IP address (a.b.c.d), his DNS server |
− | * asks the Root_DNS servers where d.c.b.a.in-addr.arpa is registered. | + | * asks the '''Root_DNS''' servers where d.c.b.a.in-addr.arpa is registered. |
− | * asks the Registrar where to get more info about d.c.b.a.in-addr.arpa. This is probably but not necessarily Your_ISPs_DNS. | + | * asks the '''Registrar''' where to get more info about d.c.b.a.in-addr.arpa. This is probably but not necessarily '''Your_ISPs_DNS'''. |
− | * asks the host indicated by the Registrar (probably Your_ISPs_DNS) what name belongs to 'd.c.b.a.in-addr.arpa'. The return value is almost always a generic filler based on your IP address unless you contact your ISP and ask them to change the PTR data for your IP address. | + | * asks the host indicated by the '''Registrar''' (probably '''Your_ISPs_DNS''') what name belongs to 'd.c.b.a.in-addr.arpa'. The return value is almost always a generic filler based on your IP address unless you contact your ISP and ask them to change the PTR data for your IP address. |
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| Basically, PTR records are managed by the organization that controls the IP address (which makes sense, if you think about it). | | Basically, PTR records are managed by the organization that controls the IP address (which makes sense, if you think about it). |