Gate

Usage:

• Provides DHCP and Internet access for the internal network (gateway)
• Provides user authentification via LDAP
• Mail and Webserver running fact-project.org
• MySQL database server
• VPN server

Ethernet interfaces: eth0, eth1
Virtual interfaces: br0, tap0, eth1:0

Check /etc/network/interfaces

eth0

eth0 is bridged to the virtual ethernet interface br0 together with tap0 for the VPN network. eth0 itself has no IP address

eth1

eth1 provides the external network access to the internet and is configured as 161.72.93.133/255.255.255.224

br0

br0 has 10.0.100.21/255.255.255.0 and holds therefore the main address to the internal interface.

tap0

Transport interface for OpenVPN. This interfaces is bridged to the internal network via eth0 and the bridge device br0.
tap0 has no IP address

eth1:0

Secondary ip address 192.168.0.21 to the private network 192.168.0.0/24. Legacy?