PowerLink Bandwidth Aggregation Redundant WAN Link and VPN Fail-Over Solutions
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1 Bandwidth Aggregation Redundant WAN Link and VPN Fail-Over Solutions
2 Find your network example: 1. Basic network with and 2 WAN lines - click here 2. Add a web server to the LAN - click here 3. Add a web, mail and pptp server to the LAN - click here 4. Duplicate web servers* on the LAN - click here 5. Basic network with, 2 WAN lines and a Firewall - click here 6. Add Ipsec server to the Firewall - click here 7. Activate Authoritative DNS server on the - click here ** Duplicate servers allow two or more servers (i.e. two mail servers or two web servers) MORE
3 Find your network example: 8. VPN Failover using DNS - click here
4 Network Scenario #1 Objective: to achieve bandwidth aggregation and outbound redundancy for a simple LAN with no firewall and no internal servers hosted. Network topology and services: - 2 ADSL lines to 2 ISPs - - s in the LAN - typical traffic: web browsing, , file transfer - DNS, web and mail services hosted outside the LAN, at the ISP s site
5 Network Scenario #1 Basic Network Features: - Outbound Session load balancing - Outbound Redundancy ISP A ISP B Configuration: As shown Router A eth0: Router B eth0: WAN IP 1: WAN IP 2: LAN IP: Ethernet IP addr: IP addr: Back to index
6 Network Scenario #2 Objectives: to achieve bandwidth aggregation and outbound redundancy for a LAN with a web server and no firewall. Further, to increase the bandwidth available for the web server. Network topology and services: - 2 ADSL lines to 2 ISPs - - s in the LAN - typical traffic out: web browsing, , file transfer - typical traffic in: web access, - DNS and mail services are hosted outside the LAN, at the ISP s site
7 Network Scenario #2 Network with one server Features: - Outbound Session load balancing - Outbound Redundancy ISP A ISP B Configuration - Port forward port 80 Source IP: and Destination IP: Router A eth0: Router B eth0: WAN IP 1: WAN IP 2: LAN IP: Ethernet Web Server MyCo.com IP: IP addr: IP addr: Back to index
8 Network Scenario #3 Objectives: to achieve bandwidth aggregation and outbound redundancy for a LAN with a web server, mail server and a VPN server (using PPTP or IPSEC). Network topology and services: - 2 ADSL lines to 2 ISPs - - s in the LAN - typical traffic out: web browsing, , file transfer - typical traffic in: pptp, web access, , file transfer - DNS authority outside the LAN, at the ISP s site
9 Network with three servers Network Scenario #3 Configuration Features: - Outbound Session load balancing - Outbound Redundancy ISP A ISP B - Port forward port 80 Source IP: and Destination IP: Port forward port 25 Source IP: and Destination IP: Port forward port Protocol forward 47 Source IP: and Destination IP: Router A eth0: Router B eth0: WAN IP 1: WAN IP 2: LAN IP: Mail Server mail.myco.com IP: PPTP Server vpn.myco.com IP: Ethernet Web Server MyCo.com IP: IP addr: IP addr: Back to index
10 Network Scenario #4 Objectives: to achieve bandwidth aggregation and outbound redundancy for a LAN with 2 web servers and no firewall. Further, to increase the bandwidth available for the web servers. Network topology and services: - 2 ADSL lines to 2 ISPs - - s in the LAN - typical traffic out: web browsing, , file transfer - typical traffic in: web access, - DNS and mail services are hosted outside the LAN, at the ISP s site
11 Network with Duplicate Servers Features: - Outbound Session load balancing - Outbound Redundancy Network Scenario #4 ISP A ISP B Configuration - Port forward port 80 Source IP: and Destination IP: Port forward port 80 Source IP: and Destination IP: Router A eth0: Router B eth0: WAN IP 1: WAN IP 2: LAN IP: Web Server MyCo.com IP: Web Server YourCo.com IP: Ethernet IP addr: IP addr: Back to index
12 Network Scenario #5 Objectives: to achieve bandwidth aggregation and outbound redundancy for a LAN with a firewall. To increase the bandwidth available for the workstations while maintaining security. Network topology and services: - 2 ADSL lines to 2 ISPs - - s in the LAN - typical traffic out: web browsing, , file transfer - typical traffic in: and file transfer - DNS, web and mail services are hosted outside the LAN, at the ISP s site
13 Network Scenario #5 Basic Network with Firewall Features: - Outbound Session load balancing - Outbound Redundancy - LAN Security ISP A ISP B Configuration As shown Router A eth0: Router B eth0: WAN IP 1: WAN IP 2: LAN IP: FIREWALL CONFIGURATION As shown Firewall External IP: Internal IP: Gateway IP: Ethernet IP addr: IP addr: Back to index
14 Network Scenario #6 Objectives: to achieve bandwidth aggregation and outbound redundancy for a LAN with a web server. To increase the bandwidth available for the web server and assure network security with a firewall. Network topology and services: - 2 ADSL lines to 2 ISPs - - s in the LAN - typical traffic out: web browsing, , file transfer - typical traffic in: web access, - DNS and mail services are hosted outside the LAN, at the ISP s site
15 Network Scenario #6 Network with Firewall and one server Features: - Session load balancing - Outbound Redundancy - LAN Security ISP A ISP B POWERLINK CONFIGURATION - Port forward port 80 Source IP: and Destination IP: Router A eth0: Router B eth0: WAN IP 1: WAN IP 2: FIREWALL CONFIGURATION Port 80 left open for incoming traffic NAT- Source IP: Dest IP: LAN IP: Firewall External IP: Internal IP: Gateway IP: IP addr: Ethernet Back to index Web Server IP addr: MyCo.com IP:
16 Network Scenario #7 Objectives: to achieve bandwidth aggregation and inbound and outbound redundancy for a LAN with a web server. To increase the bandwidth available for the web server while maintaining remote clients security and DNS (inbound) redundancy. Network topology and services: - 2 ADSL lines to 2 ISPs - configured as DNS authoritative server - s in the LAN - typical traffic out: web browsing, , file transfer - typical traffic in: web access, and file transfer - mail services are hosted outside the LAN, at the ISP s site
17 Network with IPsec Firewall and one LAN server is Authoritative DNS Server Features: - Outbound & Inbound Session load balancing - Outbound & Inbound Redundancy - LAN Security - VPN access of LAN - Automatic failover of VPN tunnels - Instant removal of faulty WAN lines from DNS advertisement Router A eth0: Network Scenario #7 ISP A ISP B - Port forward port 80 & 500 Source IP: and Destination IP: Protocol forward protocol 50 Remote clients use or to connect to the VPN server - DNS Server enabled - Create domain MyCo.com = & Router B eth0: Configuration WAN IP 1: WAN IP 2: LAN IP: FIREWALL CONFIGURATION Port 80 left open for incoming traffic NAT- Source IP: Dest IP: Firewall & IPSEC Server External IP: Internal IP: Gateway IP: Ethernet MyCo.com IP: IP addr: IP addr: Back to index Web Server
18 Network Scenario #8 Objectives: to achieve automatic failover of VPN tunnels. Network topology and services: - 2 ADSL lines to 2 ISPs - configured as DNS authoritative server - s in the LAN - VPN clients establishing connection based on vpn.myco.com
19 Network Scenario #8 Remote VPN connection established to vpn.myco.com. Broken tunnel fails over to second line based on DNS lookup from. is Authoritative DNS Server Features: - Outbound & Inbound Session load balancing - Outbound & Inbound Redundancy - LAN Security - VPN access of LAN - Automatic failover of VPN tunnels - Instant removal of faulty WAN lines from DNS advertisement ISP A x Internet Router A eth0: FIREWALL CONFIGURATION Port 80 left open for incoming traffic NAT- Source IP: Dest IP: ISP B x - Port forward port 80 & 500 Source IP: and Destination IP: Protocol forward protocol 50 Remote clients use vpn.myco.com to connect to the VPN server - DNS Server enabled - Create domain MyCo.com = & vpn.myco.com = & x Configuration Router B eth0: WAN IP 1: WAN IP 2: LAN IP: Firewall & IPSEC Server External IP: Internal IP: Gateway IP: IP addr: Ethernet Web Server IP addr: MyCo.com IP:
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