If your ProFTPD is configured to work with xinetd, the 30-second timeout during FTP connections may be related to ident packets (udp/tcp port 113) being dropped somewhere. Please try to comment the following lines in the /etc/xinetd.d/proftpd file inside the VE:
log_on_success += USERID
log_on_failure += USERID
Then restart the xinetd service:
# service xinetd restart
Try to connect via FTP.
Also, make sure that the VE is able to resolve IP addresses into hostnames (you have nameservers defined for that VE).