Forum Discussion

Gudalam's avatar
Gudalam
Icon for Nimbostratus rankNimbostratus
Apr 29, 2016

unable to do FTP to Windows FTP server from F5 device

Unable to do ftp to windows server from f5 device ( snat automap enabled)

Here is the error, what i am getting..

[admin@f5:Active:Standalone] ~  ftp 192.168.12.2
Connected to 192.168.12.2 (192.168.12.2).
220 Microsoft FTP Service
Name (192.168.12.2:admin): xxxxx
421 Service not available, remote server has closed connection
Login failed.
No control connection for command: Transport endpoint is not connected

What could be the issue and how we can resolve it ?

application delivery
BIG-IP
LTM

1 Reply

Sort By
  • IanB's avatar
    IanB
    Icon for Employee rankEmployee
    May 05, 2016

    Assuming that 192.168.12.2 is a pool member running an FTP server, and not a virtual server that load balances to a pool, then the error message is pretty clear in that the remote end (the FTP server) closed the connection. I suggest you check the logs on that device to determine why it did that. If there are any firewalls or NAT devices between the BigIP and the FTP server, then also check on them in case something sent a RST.

     

    If 192.168.12.2 is actually a virtual server on the LTM, then verify whether the ftp works if you go directly to the pool member.