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doc:howto:mwan3 [2013/10/29 14:52]
timmillerdyck add information on mapping outgoing traffic to the desired interface and IP
doc:howto:mwan3 [2013/11/02 15:13] (current)
timmillerdyck check ISP servers for reachability
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|* A multiple interface router is needed. At least three interfaces need to exist for the minimal configuration: inside LAN, WAN1 and WAN2. The simplest way to do this is use a VLAN-capable router such that individual switch ports can be put into their own VLANs, thus each becoming separate interfaces.||* A multiple interface router is needed. At least three interfaces need to exist for the minimal configuration: inside LAN, WAN1 and WAN2. The simplest way to do this is use a VLAN-capable router such that individual switch ports can be put into their own VLANs, thus each becoming separate interfaces.|
|+||==== Test external DNS/mail/etc. servers for access from each WAN interface ====|
|+||* Users in the forum have reported problems with DNS resolution or being unable to send e-mail after implementing WAN load-balancing or failover using mwan3|
|+||* The usual cause is they are using the DNS servers or a mail (SMTP/POP/IMAP) server provided by the ISP of the wan1 (original WAN) interface and when the router starts sending traffic out the wan2 interface, the ISP blocks access to its servers because the traffic is now coming from an address that is not in their own network. This is a common security configuration by ISPs and has nothing to do with mwan3 specifically.|
|+||* Option 1: Before implementing any multiple WAN configuration, test any ISP-provided services to see if they are reachable from "foreign" IP addresses and ensure that they can still be used from source IPs not on the ISPs network.|
|+||* Option 2: Change settings to switch to using servers that are known to be accessible from anywhere|
|+||* For DNS servers, using Google Public DNS (at IPs 22.214.171.124 and 126.96.36.199) is a good choice|
|===== Multiple WAN interface and routing table preparation =====||===== Multiple WAN interface and routing table preparation =====|
doc/howto/mwan3.txt · Last modified: 2013/11/02 15:13 by timmillerdyck
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