We are trying to configure a highly available FTP server using two ARM VM's with FileZilla server running on them - in an availability set - with a Microsoft Load Balancer in front.
- We are having troubles getting ACTIVE FTP to work through the Load Balancer. We get 425 errors indicating the data channel connection.
- PASV FTP works fine with NAT rules to each server in the for the PASV ranges we have setup.
- ACTIVE FTP works fine when connecting to the individual servers through their public IP address. Not through the load balancer public IP address.
- I have tried adding inbound/outbound rules to the network security group for the load balancer for ports 21, 20, ephemeral ports 1024-5000.
- Disabled the firewalls on each VM.
- Does anyone know if FTP is supported on the Micosoft Load Balancer in ARM?
Any ideas? We have a client with devices that use ACTIVE FTP spread though out the world, so its not an option to change to PASV FTP. I am losing my hair on this one ......
Thanks in advance for any ideas, recommendations, anything :-)
BMo