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Your inbound connections (port forwarding) would need to be changed to use wan2 as the public IP address. &nbsp;You would also need to be connecting to the wan2 IP address for inbound connections while wan1 is down. &nbsp;You can't connect to wan1's IP address via wan2.
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I suspected that, but I don't have the expertise to do the script to change the port forwardings to use wan2 as the public IP address.<br />
The second problem (connecting to the wan2 ip address for inbound connections while wan1 is down) is already solved.
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Unfortunately, neither do I. &nbsp;Can you even manually do this via the GUI?
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Hi<br />
have a look to this one<br />
<a href="http://www.netwidget.net/books/apress/dns/info/minimum-ttl.html" rel="ugc">http://www.netwidget.net/books/apress/dns/info/minimum-ttl.html</a><br />
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you will have to setup a short ttl for failover<br />
<br />
suppose you have http for this 2 failover, now if request come via ns1.abc.com [ isp1] now if this isp down while transferring &nbsp;the request will still try to come via isp1, unless you set ttl is short,<br />
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i think, its same concept for ping aswell.<br />
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You can use dynamic DNS for the name resolution.<br />
<br />
As far as port forwarding is concerned, can you set up the forwarding rules on both routers ahead of time, rather than trying to switch during the failover?<br />

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&quot;Can you even manually do this via the GUI?&quot;<br />
<b>Yes, I can switch things manually in the GUI, but that defeats the point of automatic failover. I'm located several hours from the place where the router is, and there are no IT people there.</b><br />
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&quot;you will have to setup a short ttl for failover&quot;<br />
<b>I did that already. &nbsp;That's working ok. The problem is not to reach the router through the appropriate wan, but to get the router to connect port forwardings to this second wan.</b><br />
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&quot;You can use dynamic DNS for the name resolution.&quot;<br />
<b>I'm using dynamic DNS. &nbsp;That part is working just fine.</b><br />
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&quot;can you set up the forwarding rules on both routers ahead of time, rather than trying to switch during the failover?&quot;<br />
&nbsp; <b>There is only one router, connected to 2 wans, and a set of scripts that changes the wan the router is using to the backup one, when it detects that the main one is down.</b><b></b><b>That works fine for outgoing traffic.</b><b></b><b>But port forwardings configured in the router are linked to the first wan, and I don't know <u>how to do a scrip</u>t that would attach those port forwardings to the backup wan.</b><br />

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You're right. &nbsp;I failed to found an already answered question.<br />
<a href="https://www.experts-exchange.com/questions/23936841/Dual-wan-with-incoming-port-forward-at-both-wan.html" rel="ugc">https://www.experts-exchange.com/questions/23936841/Dual-wan-with-incoming-port-forward-at-both-wan.html</a>
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<div class="content wysiwyg-content">
I've implemented dual wan with failover with a Linksys WRT54GL, using DD-WRT, exactly as explained here <a href="http://www.dd-wrt.com/wiki/index.php/Dual_WAN_with_failover" rel="ugc">http://www.dd-wrt.com/wiki/index.php/Dual_WAN_with_failover</a><br />
When wan1 fails and the device switches to wan2, outbound connections are fine, but inbound connections (ping, nat) don't work.<br />

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I've implemented dual wan with failover with a Linksys WRT54GL, using DD-WRT, exactly as explained here http://www.dd-wrt.com/wiki/index.php/Dual_WAN_with_failover
When wan1 fails and the device switches to wan2, outbound connections are fine, but inbound connections (ping, nat) don't work.


Dual wan with failover with a Linksys WRT54GL

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