[Joker]

Ok i just reproduced this.
Both servers are using glftpd 1.32_Linux+TLS

SSL enabled on the right one, and non ssl on the left one.

As you can see where it says 500 'OOP': Command not understood.
it doesnt give waiting for remaining noops.

But [22:57:25] [L] 200 NOOP command successful. gives the noops.

The numbers of Waiting for remaining noop replies. Please wait.. are not the same, sometimes it gives 3 and sometimes 5-6.

[22:52:36] Transferred: xxx.r52 50 000 000 bytes in 1 minutes 59 seconds (407,4 KB/s)
[22:52:36] [R] PASV
[22:52:36] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,165,239)
[22:52:36] [L] PORT xxx,xxx,xxx,196,165,239
[22:52:36] [L] 200 PORT command successful.
[22:52:36] [L] STOR xxx.r44
[22:52:37] [L] 150 Opening BINARY mode data connection for xxx.r44.
[22:52:37] [R] RETR xxx.r44
[22:52:37] [R] 150 Opening BINARY mode data connection for xxx.r44 (50000000 bytes).
[22:54:44] [R] 226- [Ul: 0.0MB] [Dl: 286.1MB] [Speed: 382.58K/s] [Free: 250437MB]
[22:54:44] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[22:54:44] [R] 500 'OOP': Command not understood.
[22:54:45] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[22:54:46] [L] 226- | + CRC-Check: oK! |
[22:54:46] [L] 226- `-[###:::::::::::]------------------------[19/85]--'
[22:54:46] [L] 226- [Ul: 298797.8MB] [Dl: 246031.2MB] [Speed: 379.15K/s] [Free: 80014MB]
[22:54:46] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[22:54:46] [L] 500 'OOP': Command not understood.
[22:54:46] Transferred: xxx.r44 50 000 000 bytes in 2 minutes 9 seconds (378,4 KB/s)
[22:54:47] [R] PASV
[22:54:47] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,166,1)
[22:54:47] [L] PORT xxx,xxx,xxx,196,166,1
[22:54:47] [L] 200 PORT command successful.
[22:54:47] [L] STOR xxx.r46
[22:54:47] [L] 150 Opening BINARY mode data connection for xxx.r46.
[22:54:47] [R] RETR xxx.r46
[22:54:47] [R] 150 Opening BINARY mode data connection for xxx.r46 (50000000 bytes).
[22:57:23] [R] 226- [Ul: 0.0MB] [Dl: 333.8MB] [Speed: 313.42K/s] [Free: 250437MB]
[22:57:23] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[22:57:23] [R] 200 NOOP command successful.
[22:57:25] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[22:57:25] [L] 226- | + CRC-Check: oK! |
[22:57:25] [L] 226- `-[###:::::::::::]------------------------[22/85]--'
[22:57:25] [L] 226- [Ul: 298845.5MB] [Dl: 246031.2MB] [Speed: 310.27K/s] [Free: 79836MB]
[22:57:25] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[22:57:25] [L] 200 NOOP command successful.
[22:57:25] Transferred: xxx.r46 50 000 000 bytes in 2 minutes 37 seconds (309,7 KB/s)
[22:57:25] Waiting for remaining noop replies. Please wait..
[22:57:47] [R] PASV
[22:57:47] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,166,43)
[22:57:47] [L] PORT xxx,xxx,xxx,196,166,43
[22:57:47] [L] 200 PORT command successful.
[22:57:47] [L] STOR xxx.r48
[22:57:47] [L] 150 Opening BINARY mode data connection for xxx.r48.
[22:57:47] [R] RETR xxx.r48
[22:57:47] [R] 150 Opening BINARY mode data connection for xxx.r48 (50000000 bytes).
[23:00:44] [R] 226- [Ul: 0.0MB] [Dl: 381.5MB] [Speed: 276.88K/s] [Free: 250437MB]
[23:00:44] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[23:00:44] [R] 200 NOOP command successful.
[23:00:45] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[23:00:45] [L] 226- | + CRC-Check: oK! |
[23:00:45] [L] 226- `-[####::::::::::]------------------------[27/85]--'
[23:00:45] [L] 226- [Ul: 298893.2MB] [Dl: 246031.2MB] [Speed: 274.96K/s] [Free: 79615MB]
[23:00:45] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[23:00:45] [L] 200 NOOP command successful.
[23:00:45] Transferred: xxx.r48 50 000 000 bytes in 2 minutes 57 seconds (274,7 KB/s)
[23:00:45] Waiting for remaining noop replies. Please wait..
[23:01:07] [R] PASV
[23:01:07] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,166,103)
[23:01:07] [L] PORT xxx,xxx,xxx,196,166,103
[23:01:07] [L] 200 PORT command successful.
[23:01:07] [L] STOR xxx.r49
[23:01:07] [L] 150 Opening BINARY mode data connection for xxx.r49.
[23:01:07] [R] RETR xxx.r49
[23:01:07] [R] 150 Opening BINARY mode data connection for xxx.r49 (50000000 bytes).
[23:04:11] [R] 226- [Ul: 0.0MB] [Dl: 429.2MB] [Speed: 265.72K/s] [Free: 250437MB]
[23:04:11] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[23:04:13] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[23:04:13] [L] 226- | + CRC-Check: oK! |
[23:04:13] [L] 226- `-[#####:::::::::]------------------------[31/85]--'
[23:04:13] [L] 226- [Ul: 298940.9MB] [Dl: 246031.2MB] [Speed: 263.19K/s] [Free: 79383MB]
[23:04:13] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[23:04:13] [L] 500 'OOP': Command not understood.
[23:04:13] Transferred: xxx.r49 50 000 000 bytes in 3 minutes 5 seconds (262,8 KB/s)
[23:04:14] [R] PASV
[23:04:14] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,166,169)
[23:04:14] [L] PORT xxx,xxx,xxx,196,166,169
[23:04:14] [L] 200 PORT command successful.
[23:04:14] [L] STOR xxx.r58
[23:04:14] [L] 150 Opening BINARY mode data connection for xxx.r58.
[23:04:14] [R] RETR xxx.r58
[23:04:15] [R] 150 Opening BINARY mode data connection for xxx.r58 (50000000 bytes).
[23:07:24] [R] 226- [Ul: 0.0MB] [Dl: 476.9MB] [Speed: 258.11K/s] [Free: 250437MB]
[23:07:24] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[23:07:24] [R] 500 'OOP': Command not understood.
[23:07:25] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[23:07:25] [L] 226- | + CRC-Check: oK! |
[23:07:25] [L] 226- `-[#####:::::::::]------------------------[35/85]--'
[23:07:25] [L] 226- [Ul: 298988.6MB] [Dl: 246031.2MB] [Speed: 256.64K/s] [Free: 79167MB]
[23:07:25] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[23:07:25] [L] 500 'OOP': Command not understood.
[23:07:25] Transferred: xxx.r58 50 000 000 bytes in 3 minutes 10 seconds (256,4 KB/s)
[23:07:26] [R] PASV
[23:07:26] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,166,195)
[23:07:26] [L] PORT xxx,xxx,xxx,196,166,195
[23:07:26] [L] 200 PORT command successful.
[23:07:26] [L] STOR xxx.r69
[23:07:27] [L] 150 Opening BINARY mode data connection for xxx.r69.
[23:07:27] [R] RETR xxx.r69
[23:07:27] [R] 150 Opening BINARY mode data connection for xxx.r69 (50000000 bytes).
[23:10:39] [R] 226- [Ul: 0.0MB] [Dl: 524.5MB] [Speed: 254.28K/s] [Free: 250437MB]
[23:10:39] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[23:10:39] [R] 500 'OOP': Command not understood.
[23:10:41] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[23:10:41] [L] 226- | + CRC-Check: oK! |
[23:10:41] [L] 226- `-[######::::::::]------------------------[40/85]--'
[23:10:41] [L] 226- [Ul: 299036.2MB] [Dl: 246031.2MB] [Speed: 251.45K/s] [Free: 78947MB]
[23:10:41] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[23:10:41] [L] 500 'OOP': Command not understood.
[23:10:41] Transferred: xxx.r69 50 000 000 bytes in 3 minutes 14 seconds (251,0 KB/s)
[23:10:41] [R] PASV
[23:10:41] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,166,233)
[23:10:41] [L] PORT xxx,xxx,xxx,196,166,233
[23:10:41] [L] 200 PORT command successful.
[23:10:41] [L] STOR xxx.r68
[23:10:42] [L] 150 Opening BINARY mode data connection for xxx.r68.
[23:10:42] [R] RETR xxx.r68
[23:10:42] [R] 150 Opening BINARY mode data connection for xxx.r68 (50000000 bytes).
[23:13:18] [R] 226- [Ul: 0.0MB] [Dl: 572.2MB] [Speed: 312.58K/s] [Free: 250437MB]
[23:13:18] [R] 226 [Section: DEFAULT] [Credits: 0.0MB] [Ratio: Unlimited]
[23:13:18] [R] 200 NOOP command successful.
[23:13:19] [L] 226- .----=== ZipScript-C ===--,d1'--=== (C) 2002 ===---.
[23:13:19] [L] 226- | + CRC-Check: oK! |
[23:13:19] [L] 226- `-[#######:::::::]------------------------[44/85]--'
[23:13:19] [L] 226- [Ul: 299083.9MB] [Dl: 246031.2MB] [Speed: 310.74K/s] [Free: 78777MB]
[23:13:19] [L] 226 [Section: DEFAULT] [Credits: 30347.0MB] [Ratio: Unlimited]
[23:13:19] [L] 200 NOOP command successful.
[23:13:19] Transferred: xxx.r68 50 000 000 bytes in 2 minutes 37 seconds (310,3 KB/s)
[23:13:19] Waiting for remaining noop replies. Please wait..
[23:13:41] Waiting for remaining noop replies. Please wait..
[23:13:03] Waiting for remaining noop replies. Please wait..
[23:13:25] Waiting for remaining noop replies. Please wait..
[23:13:47] Waiting for remaining noop replies. Please wait..
[23:14:08] [R] PASV
[23:14:08] [R] 227 Entering Passive Mode (xxx,xxx,xxx,196,167,3)
[23:14:08] [L] PORT xxx,xxx,xxx,196,167,3
[23:14:08] [L] 200 PORT command successful.
[23:14:08] [L] STOR xxx.r72
[23:14:08] [L] 150 Opening BINARY mode data connection for xxx.r72.
[23:14:08] [R] RETR xxx.r72
[23:14:08] [R] 150 Opening BINARY mode data connection for xxx.r72 (50000000 bytes).

I cant paste any longer msg so ive cuttet a part of the log, which is pretty the same anyway. Sometimes it gives one waiting for remaining noop, and sometime it gives many of those.