FTP has mysteriously stopped working

Question

For some reason, FTP has suddenly stopped working on my MacBook Pro. I've tried with Cyberduck, Firefox and Camino. I've tried rebooting, and I've tried restarting the modem and router (a Time Capsule).
I know there's nothing wrong with the remote server, *because I can use FTP fine on my MacBook on the same wifi network.*
With Firefox I get the error:
+426 Transfer aborted. Data connection closed.+
With Cyberduck I get the error:
+Read timed out.+
The full log for Cyberduck is:
+220 ProFTPD 1.3.0a Server ready.+
+USER tester+
+331 Password required for tester.+
+PASS ******+
+230 User tester logged in.+
FEAT
211-Features:
MDTM
+REST STREAM+
SIZE
+AUTH TLS+
PBSZ
PROT
+211 End+
+CWD /+
+250 CWD command successful+
+TYPE I+
+200 Type set to I+
PASV
+227 Entering Passive Mode (209,240,132,53,7,89).+
+RETR FILE.zip+
+150 Opening BINARY mode data connection for FILE.zip (36911497 bytes)+
QUIT
+220 ProFTPD 1.3.0a Server ready.+
+USER tester+
+331 Password required for tester.+
+PASS ******+
+230 User tester logged in.+
FEAT
211-Features:
MDTM
+REST STREAM+
SIZE
+AUTH TLS+
PBSZ
PROT
+211 End+
+CWD /+
+250 CWD command successful+
+TYPE I+
+200 Type set to I+
PASV
+227 Entering Passive Mode (209,240,132,53,9,234).+
+RETR FILE.zip+
+150 Opening BINARY mode data connection for FILE.zip (36911497 bytes)+
QUIT

Answer 1

This might be way off base but today I couldn't connect between my MacPro and my MacBook over my wireless home network. I checked under sharing on the MacBook and for some reason the AFP option under file sharing was off. I didn't turn it off. I assume SL helpfully did it for me. I've noticed a few weird things like that happening. There's an FTP option in the same area. Maybe check that out.