I setup a ftp server on my WIn 7 system and installed WireShark. What I see from WireShark is the DCS2310 successfully login (anonymous) with a password. It then issues the following requests
Request: SYST Response: Windows_NT
Request: PWD Response: "/"
Request: QUIT Response: Goodbye
It does this repeatedly (every minute).
The DCS obviously doesn't like something, but what?
I tried both "\" and "/" for the DCS2310 Remote Folder Name.
I also tried both the MSDOS and UNIX Directory Listing Style options on the FTP Server.
WireShark Trace
No. Time Source Destination Protocol Length Info
390 30.289608000 192.168.1.133 192.168.1.112 TCP 74 4821 > ftp [SYN] Seq=0 Win=5840 Len=0 MSS=1460 SACK_PERM=1 TSval=21125589 TSecr=0 WS=2
Frame 390: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 0, Len: 0
No. Time Source Destination Protocol Length Info
391 30.289819000 192.168.1.112 192.168.1.133 TCP 74 ftp > 4821 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 TSval=2724165 TSecr=21125589
Frame 391: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 0, Ack: 1, Len: 0
No. Time Source Destination Protocol Length Info
392 30.290155000 192.168.1.133 192.168.1.112 TCP 66 4821 > ftp [ACK] Seq=1 Ack=1 Win=5840 Len=0 TSval=21125589 TSecr=2724165
Frame 392: 66 bytes on wire (528 bits), 66 bytes captured (528 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 1, Ack: 1, Len: 0
No. Time Source Destination Protocol Length Info
393 30.290408000 192.168.1.112 192.168.1.133 FTP 93 Response: 220 Microsoft FTP Service
Frame 393: 93 bytes on wire (744 bits), 93 bytes captured (744 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 1, Ack: 1, Len: 27
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
394 30.290741000 192.168.1.133 192.168.1.112 TCP 66 4821 > ftp [ACK] Seq=1 Ack=28 Win=5840 Len=0 TSval=21125589 TSecr=2724165
Frame 394: 66 bytes on wire (528 bits), 66 bytes captured (528 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 1, Ack: 28, Len: 0
No. Time Source Destination Protocol Length Info
395 30.295525000 192.168.1.133 192.168.1.112 FTP 82 Request: USER anonymous
Frame 395: 82 bytes on wire (656 bits), 82 bytes captured (656 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 1, Ack: 28, Len: 16
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
396 30.295612000 192.168.1.112 192.168.1.133 FTP 138 Response: 331 Anonymous access allowed, send identity (e-mail name) as password.
Frame 396: 138 bytes on wire (1104 bits), 138 bytes captured (1104 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 28, Ack: 17, Len: 72
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
397 30.297006000 192.168.1.133 192.168.1.112 FTP 90 Request: PASS anybody@gmail.com
Frame 397: 90 bytes on wire (720 bits), 90 bytes captured (720 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 17, Ack: 100, Len: 24
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
398 30.297341000 192.168.1.112 192.168.1.133 FTP 90 Response: 230-Welcome to XPS-420
Frame 398: 90 bytes on wire (720 bits), 90 bytes captured (720 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 100, Ack: 41, Len: 24
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
399 30.297367000 192.168.1.112 192.168.1.133 FTP 132 Response: Directory has 368,223,232,000 bytes of disk space available.
Frame 399: 132 bytes on wire (1056 bits), 132 bytes captured (1056 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 124, Ack: 41, Len: 66
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
400 30.297389000 192.168.1.112 192.168.1.133 FTP 87 Response: 230 User logged in.
Frame 400: 87 bytes on wire (696 bits), 87 bytes captured (696 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 190, Ack: 41, Len: 21
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
401 30.299482000 192.168.1.133 192.168.1.112 FTP 72 Request: SYST
Frame 401: 72 bytes on wire (576 bits), 72 bytes captured (576 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 41, Ack: 211, Len: 6
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
402 30.299555000 192.168.1.112 192.168.1.133 FTP 82 Response: 215 Windows_NT
Frame 402: 82 bytes on wire (656 bits), 82 bytes captured (656 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 211, Ack: 47, Len: 16
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
403 30.300750000 192.168.1.133 192.168.1.112 FTP 71 Request: PWD
Frame 403: 71 bytes on wire (568 bits), 71 bytes captured (568 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 47, Ack: 227, Len: 5
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
404 30.300821000 192.168.1.112 192.168.1.133 FTP 97 Response: 257 "/" is current directory.
Frame 404: 97 bytes on wire (776 bits), 97 bytes captured (776 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 227, Ack: 52, Len: 31
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
405 30.303278000 192.168.1.133 192.168.1.112 FTP 72 Request: QUIT
Frame 405: 72 bytes on wire (576 bits), 72 bytes captured (576 bits) on interface 0
Ethernet II, Src: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1), Dst: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a)
Internet Protocol Version 4, Src: 192.168.1.133 (192.168.1.133), Dst: 192.168.1.112 (192.168.1.112)
Transmission Control Protocol, Src Port: 4821 (4821), Dst Port: ftp (21), Seq: 52, Ack: 258, Len: 6
File Transfer Protocol (FTP)
No. Time Source Destination Protocol Length Info
406 30.303346000 192.168.1.112 192.168.1.133 FTP 80 Response: 221 Goodbye.
Frame 406: 80 bytes on wire (640 bits), 80 bytes captured (640 bits) on interface 0
Ethernet II, Src: 2wire_4c:8e:0a (00:1e:c9:4c:8e:0a), Dst: D-LinkIn_06:5a:e1 (28:10:7b:06:5a:e1)
Internet Protocol Version 4, Src: 192.168.1.112 (192.168.1.112), Dst: 192.168.1.133 (192.168.1.133)
Transmission Control Protocol, Src Port: ftp (21), Dst Port: 4821 (4821), Seq: 258, Ack: 58, Len: 14
File Transfer Protocol (FTP)