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If a router operates several Internet connections (e.g. for a load balancer), all connections other than the first one (which usually has the routing tag 0) need to be specified with default routes with routing tags other than 0 in order for them to be addressed. If they are individual connections and not a load balancer, the default routes must be created in order for the Internet connection to be established at all.
As of LCOS 10.40, a port forwarding and a VPN dial-in on an Internet connection with a routing tag other than 0 require an entry in the WAN tag table, otherwise the response packets will not be routed over this Internet connection. Instead, the response packets will be sent via the Internet connection with routing tag 0. Furthermore, a firewall rule has to be created to then remove the tag set by the WAN tag table. Otherwise, packets intended for the local network will be sent out over the Internet connection again.
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- LCOS as of version 10.40 (download latest version)
- LANtools from version 10.40 (download latest version)
- Functional port forwarding and/or VPN dial-in
Scenario:
- Two Internet connections have been set up (INTERNET and INTERNET2).
- Port forwarding should use the Internet connection INTERNET2 with the routing tag 1.
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