Mitel SME Server V5 with ServiceLink Uživatelská příručka stáhnout pdf (Strana 9)

Chapter 3. ServiceLink

• DNS Services

One of the components of a full Internet solution is a domain name. Most businesses using the SME Server V5 with ServiceLink will want to

register a domain name representing their business, and will need a DNS host to make this domain name accessible to the world.

For reasons of security and reliability, the server is not conﬁgured to publish DNS records by itself. (Any network server can be conﬁgured to act

as a public DNS server, but doing so can create a serious security vulnerability.) A properly administered DNS host needs to be stable and always

on the Internet, which is why a Network Operations Center such as that of Mitel Networks Corporation is ideally suited to the task.

The domain name hosting service provided by ServiceLink allows you to publish domain name records via our NOC. In addition to any domain

names you may have registered, you will also be able to use the special e-smith.net domain. This provides a low-cost alternative for small

businesses or home users who do not wish to pay registration fees for a .com or other domain. Users may register their server with a name such as

"mycompany.e-smith.net".

• IPSEC VPNs

As discussed in the section on remote access, your server provides support for client-to-server Virtual Private Networks (VPNs) using PPTP.

ServiceLink provides the additional ability to create server-to-server VPNs using the highly secure IPSEC standard. This service allows you to

link together servers in different physical locations to make one seamless "virtual" network. Information sent via this network is encrypted to

prevent "snooping" by others on the Internet.

Note: The size of the VPN which can be supported may be limited by the ServiceLink options you have chosen. Contact your authorized reseller

for more information.

To encrypt network trafﬁc between servers, the server uses the IPSEC protocol. This system uses an encryption technique known as public key

cryptography. In simple terms, each server connected in a VPN knows the public key of each of the other servers on the network; it uses that key

to encrypt data intended for that server. A private key on the receiving server is then used to decrypt the data.

One of the difﬁculties in setting up a VPN is securely exchanging the keys required to set up the VPN. ServiceLink simpliﬁes and automates this

process via a trusted central exchange – the Mitel Networks NOC. In addition, ServiceLink also secures and automates the renewal of encryption

keys.

When you establish a VPN using ServiceLink, one server is designated to act as the "primary" server - the server whose user accounts will be

accessible via the VPN. The other servers in the VPN (known as secondary servers) will function as gateways for the users on their local networks.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 90 91

Žádné komentáře

Mitel SME Server V5 with ServiceLink Uživatelská příručka Strana 9