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Network_center1's avatar
Network_center1
Icon for Nimbostratus rankNimbostratus
Nov 04, 2019

Slow FTP connection behind F5

Hello there,   I have an issue I don't understand.   Some customers connect on one of our FTP server behind the F5. Public IP of the virtual server on port 21 > default pool > one server por...
application delivery
BIG-IP
Network_center1's avatar
Network_center1
Icon for Nimbostratus rankNimbostratus
Nov 17, 2019

The issue is only via F5 ^^

 

I opened your link and don't understand much '^^

Network_center1's avatar
Network_center1
Icon for Nimbostratus rankNimbostratus
Nov 19, 2019

Did the tcpdump on the lan side, nothing to see here.

 

F5 > ftp request : USER usertest

ftp > F5 ACK

****

5second blank

****

ftp > F5 response : 331 password required for usetest

F5 > ftp ACK

 

The same when the password is sent, and when the directory is required.