User:Buddy2239/sandbox

= Routers = Routers in networks notusing private address space, especially those of Internet serviceproviders, are expected to be configured to reject (filter out)routing information about private networks. Addresses within this private address space willonly be unique within the enterprise, or the set of enterprises whichchoose to cooperate over this space so they may communicate with eachother in their own private internet. Moving a host from private to public or vice versa involves a changeof IP address, changes to the appropriate DNS entries, and changes toconfiguration files on other hosts that reference the host by IPaddress. Public hosts do not have connectivity to private hosts of otherenterprises. Anenterprise that requests IP addresses for its external connectivitywill never be assigned addresses from the blocks defined above. .  Note that (inpre-CIDR notation) the first block is nothing but a single class Anetwork number, while the second block is a set of 16 contiguousclass B network numbers, and third block is a set of 256 contiguousclass C network numbers. Note that (inpre-CIDR notation) the first block is nothing but a single class Anetwork number, while the second block is a set of 16 contiguousclass B network numbers, and third block is a set of 256 contiguousclass C network numbers. In particular, Internet service providers should takemeasures to prevent such leakage. Public hosts can communicatewith other hosts inside the enterprise both public and private andcan have IP connectivity to public hosts outside the enterprise. We will refer to the first block as "24-bit block", the second as"20-bit block", and to the third as "16-bit" block. Such hosts will use the private address spacedefined above. Addresses within this private address space willonly be unique within the enterprise, or the set of enterprises whichchoose to cooperate over this space so they may communicate with eachother in their own private internet. Public hosts can communicatewith other hosts inside the enterprise both public and private andcan have IP connectivity to public hosts outside the enterprise. Prominent examples of such references are DNS ResourceRecords and other information referring to internal privateaddresses. Because private addresses have no global meaning, routing informationabout private networks shall not be propagated on inter-enterpriselinks, and packets with private source or destination addressesshould not be forwarded across such links. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. All other hosts will be public and will use globally unique addressspace assigned by an Internet Registry. Addresses within this private address space willonly be unique within the enterprise, or the set of enterprises whichchoose to cooperate over this space so they may communicate with eachother in their own private internet. An enterprise that decides to use IP addresses out of the addressspace defined in this document can do so without any coordinationwith IANA or an Internet registry. Routers in networks notusing private address space, especially those of Internet serviceproviders, are expected to be configured to reject (filter out)routing information about private networks. Indirect references to such addresses should be contained within theenterprise. Because private addresses have no global meaning, routing informationabout private networks shall not be propagated on inter-enterpriselinks, and packets with private source or destination addressesshould not be forwarded across such links. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. Private hosts can communicate with all other hostsinside the enterprise, both public and private. Such hosts will use the private address spacedefined above. We will refer to the first block as "24-bit block", the second as"20-bit block", and to the third as "16-bit" block. Public hosts can communicatewith other hosts inside the enterprise both public and private andcan have IP connectivity to public hosts outside the enterprise. We will refer to the first block as "24-bit block", the second as"20-bit block", and to the third as "16-bit" block. While nothaving external (outside of the enterprise) IP connectivity privatehosts can still have access to external services via mediatinggateways. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. Addresses within this private address space willonly be unique within the enterprise, or the set of enterprises whichchoose to cooperate over this space so they may communicate with eachother in their own private internet. The address space can thus be usedby many enterprises. .  While nothaving external (outside of the enterprise) IP connectivity privatehosts can still have access to external services via mediatinggateways. An enterprise that decides to use IP addresses out of the addressspace defined in this document can do so without any coordinationwith IANA or an Internet registry. We will refer to the first block as "24-bit block", the second as"20-bit block", and to the third as "16-bit" block. All other hosts will be public and will use globally unique addressspace assigned by an Internet Registry. Note that (inpre-CIDR notation) the first block is nothing but a single class Anetwork number, while the second block is a set of 16 contiguousclass B network numbers, and third block is a set of 256 contiguousclass C network numbers. Public hosts do not have connectivity to private hosts of otherenterprises. All other hosts will be public and will use globally unique addressspace assigned by an Internet Registry. Private hosts can communicate with all other hostsinside the enterprise, both public and private. If such a router receivessuch information the rejection shall not be treated as a routingprotocol error. The address space can thus be usedby many enterprises. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. All other hosts will be public and will use globally unique addressspace assigned by an Internet Registry. While nothaving external (outside of the enterprise) IP connectivity privatehosts can still have access to external services via mediatinggateways. Indirect references to such addresses should be contained within theenterprise. Because private addresses have no global meaning, routing informationabout private networks shall not be propagated on inter-enterpriselinks, and packets with private source or destination addressesshould not be forwarded across such links. Public hosts do not have connectivity to private hosts of otherenterprises. Public hosts do not have connectivity to private hosts of otherenterprises. Public hosts can communicatewith other hosts inside the enterprise both public and private andcan have IP connectivity to public hosts outside the enterprise. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. In particular, Internet service providers should takemeasures to prevent such leakage. Prominent examples of such references are DNS ResourceRecords and other information referring to internal privateaddresses. Because private addresses have no global meaning, routing informationabout private networks shall not be propagated on inter-enterpriselinks, and packets with private source or destination addressesshould not be forwarded across such links. Anenterprise that requests IP addresses for its external connectivitywill never be assigned addresses from the blocks defined above. In particular, Internet service providers should takemeasures to prevent such leakage. Anenterprise that requests IP addresses for its external connectivitywill never be assigned addresses from the blocks defined above. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. Private hosts can communicate with all other hostsinside the enterprise, both public and private. Public hosts do not have connectivity to private hosts of otherenterprises. While nothaving external (outside of the enterprise) IP connectivity privatehosts can still have access to external services via mediatinggateways. All other hosts will be public and will use globally unique addressspace assigned by an Internet Registry. Public hosts can communicatewith other hosts inside the enterprise both public and private andcan have IP connectivity to public hosts outside the enterprise. . Moving a host from private to public or vice versa involves a changeof IP address, changes to the appropriate DNS entries, and changes toconfiguration files on other hosts that reference the host by IPaddress. Public hosts do not have connectivity to private hosts of otherenterprises. All other hosts will be public and will use globally unique addressspace assigned by an Internet Registry. Because private addresses have no global meaning, routing informationabout private networks shall not be propagated on inter-enterpriselinks, and packets with private source or destination addressesshould not be forwarded across such links. Anenterprise that requests IP addresses for its external connectivitywill never be assigned addresses from the blocks defined above. An enterprise that decides to use IP addresses out of the addressspace defined in this document can do so without any coordinationwith IANA or an Internet registry. The address space can thus be usedby many enterprises. Note that (inpre-CIDR notation) the first block is nothing but a single class Anetwork number, while the second block is a set of 16 contiguousclass B network numbers, and third block is a set of 256 contiguousclass C network numbers. As before, any enterprise that needs globally unique address space isrequired to obtain such addresses from an Internet registry. While nothaving external (outside of the enterprise) IP connectivity privatehosts can still have access to external services via mediatinggateways. Public hosts can communicatewith other hosts inside the enterprise both public and private andcan have IP connectivity to public hosts outside the enterprise. Routers in networks notusing private address space, especially those of Internet serviceproviders, are expected to be configured to reject (filter out)routing information about private networks. Such hosts will use the private address spacedefined above. In order to use private address space, an enterprise needs todetermine which hosts do not need to have network layer connectivityoutside the enterprise in the foreseeable future and thus could beclassified as private. Such hosts will use the private address spacedefined above. .  Prominent examples of such references are DNS ResourceRecords and other information referring to internal privateaddresses. Moving a host from private to public or vice versa involves a changeof IP address, changes to the appropriate DNS entries, and changes toconfiguration files on other hosts that reference the host by IPaddress. In particular, Internet service providers should takemeasures to prevent such leakage. Routers in networks notusing private address space, especially those of Internet serviceproviders, are expected to be configured to reject (filter out)routing information about private networks. Such hosts will use the private address spacedefined above. As before, any enterprise that needs globally unique address space isrequired to obtain such addresses from an Internet registry. Because private addresses have no global meaning, routing informationabout private networks shall not be propagated on inter-enterpriselinks, and packets with private source or destination addressesshould not be forwarded across such links.