Detailing the L2TP/IPsec Secure Protocol
Windows Server offers an additional layer of encryption and security by utilizing IP Security (IPsec), a Layer 3 encryption protocol, in concert with L2TP in what is known, not surprisingly, as L2TP/IPsec. IPsec allows for the encryption of the L2TP header and trailer information, which is normally sent in clear text. This also has the added advantage of dual-encrypting the payload, adding an additional level of security into the mix. IPsec is particularly useful in communications between SharePoint servers because information sent between members of a farm is unencrypted by default, making it more vulnerable to snooping.
L2TP/IPsec has some distinct advantages over standard L2TP, namely the following: ...
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