Procurement executives often are overzealous or unrealistic about the rate of change that is possible around indirect spend aggregation within an organization. It is virtually impossible to get all of the internal stakeholders on board at the very beginning.
Socks 5 - is the most used and secure proxy protocols,Suport both TCP and UDP,with UDP you can get Name resolution(DNS lookups) and authentication.You can use the Socks5 proxy instead of Socks4 proxy,More over you can use the it's for ICQ,Skype and so on.
So, Bill connects to the SOCKS proxy on his network, informing it about the connection he wishes to make to Jane; the SOCKS proxy opens a connection through the firewall and facilitates the communication between Bill and Jane.