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Mail FTP Bastion Hosts Bastion Hosts Router/Firewall Router/Firewall Internal Network Internet
Mail FTP Router/Firewall Router/Firewall Internet Internal Network
Mail InternalServer Router/Firewall Internet DMZ Segment InternalHost InternalHost
Mail AppServer AppServer Router/Firewall Router/Firewall Router/Firewall Internal Network Internet ???
Mail ISP Router Router/Firewall Router/Firewall Router/Firewall Router/Firewall Application Management Colocation Facility OR VPN Connection Point-To-Point Connection Internet Corporate Facility Proxy Internal Network
Router/Firewall Router/Firewall D M Z D M Z Router/Firewall Router/Firewall Router/Firewall Internet Company A Company B VPN orDirect Line VPN orDirect Line Corp A Corp B
www DNS Mail Internet Mail SSH Router/Firewall Router/Firewall SNMP Syslog SNMP Query Syslog www SSH SNMP Trap SSH Mail DNS Allows system management Deny everything else SNMP Trap Syslog SSH SNMP Query SNMPMonitor Loghost ManagementStation
Mail Console Console Console Router/Firewall Router/Firewall Internal Network Internet www / DNS / Mail SSH ConsoleServer Syslog Loghost OOB SNMP Trap Syslog SSH SNMP Trap Serial Dumb Log Int SSH SNMP Query SSH Monitor SSH GW OOB
Promiscuous No IP Corp Mail Prod Mail Promiscuous No IP Promiscuous No IP FTP Router/Firewall Router/Firewall Router/Firewall Router/Firewall Router/Firewall Application Internet Emergency! Monitor Syslog Corp Proxy Monitor Syslog Internal Corp Network Monitor Pull Monitor Syslog Backup Monitor Syslog MonitorMaster IDSMaster SSH GW