tFTPPut - You are connected using IPv6. PORT is only for IPv4

[talendtester]

I have a job which uses tFTPPut to ftp a small file on a sever everyday. The job worked fine for over a year, in the last few days its failing with the error "com.enterprisedt.net.ftp.FTPException: 500 You are connected using IPv6. PORT is only for IPv4. You have to use the EPRT command instead."

Nothing was changed in the job.

What might have been changed on the server? 

Any ideas on what I can check?

Here is the component tab:

[talendtester · Accepted solution]

Turns out the server alias is no longer pointing to the correct IP address, so instead of using the server alias I changed to using the new IP address.