I just bought a new Draytek and have configured it similarly to our old router, however we have been having trouble getting it to work as the previous one. There are two issues, but I am submitting separate posts for each one.

Our router has 2 WAN connections. One is a single dynamic IP address, the other has 5 static addresses. These are all setup under the WAN IP Addresses of WAN2. WAN 1 is just a backup connection. Currently we have a rule setup in Routing Policy that specifies all IP addresses on our internal subnet to get routed over IP 1 of WAN2, however when we do a search to see which IP we are connecting from it connects randomly over any of the 5 IP addresses. If we select any of the other IP addresses it works as expected. Changing it back again reproduces the fault.

We are currently using firmware 3.7.3.2.

Thank in advance for any help.

un-tick join IP nat pool from within the IP alias' and just have the 1st static ticked that way the traffic will only come from that one address

If you want a LAN ip to look like its coming from another WAN IP Alias you need to you the address mapping.