This revokes their membership, but does not prevent them from re-joining the network. Member Eviction: Evict an existing member from your Hamachi network. Membership Approval: Prevent new members from having full access to your network until manually approved by you or an administrator. This preserves all other access control settings. Network Lock: Lock your Hamachi networks to prevent any new members from joining. Password Protection: Require anyone attempting to join your network to present a valid network password. Group Chat: Chat with all online network members at once in a single chat window. Peer to Peer Chat: Exchange chat messages with both on and off-line Hamachi peers. User Capacity: Each Hamachi network can have up to 50 concurrent users. Network Capacity: Create or join up to 256 Hamachi networks. For example, if your home computer is connected to the Internet via Connection Sharing or Broadband Router, you will not generally be able to access it, say, from your office. Hamachi will allow you to establish secure direct connections to PCs that are not accessible otherwise due to the restrictions in network setup. A networking technology enabling any two computers on the Internet to talk directly to each other.