A first look at telnet

Paste this command into your terminal:

The password to connect is

Question 1: The username

What is the username that the client used to log on this server ?

Question 2: The password

What is the password that the client used to log on this server ?

Question 3: Telnet trace

This packet trace was collected on a server while a client was connecting to the telnet service. Telnet supports remote logins and basically a telnet session is a TCP connection where:

the keys typed by the client are sent as ASCII characters

the server output is sent as ASCII characters

Looking at the trace below or using wireshark, can you extract some information ? Note that the 20 bytes packets that you see below are pure TCP acknowledgements that do not carry any data.

#	Length	Summary
0	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 0, Len: 0`
1	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 0, Ack: 1, Len: 0`
2	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 1, Ack: 1, Len: 0`
3	56 bytes	`Telnet`
4	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 1, Ack: 25, Len: 0`
5	44 bytes	`Telnet`
6	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 25, Ack: 13, Len: 0`
7	47 bytes	`Telnet`
8	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 25, Ack: 28, Len: 0`
9	44 bytes	`Telnet`
10	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 28, Ack: 37, Len: 0`
11	50 bytes	`Telnet`
12	75 bytes	`Telnet`
13	35 bytes	`Telnet`
14	35 bytes	`Telnet`
15	35 bytes	`Telnet`
16	35 bytes	`Telnet`
17	52 bytes	`Telnet`
18	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 86, Ack: 72, Len: 0`
19	50 bytes	`Telnet`
20	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 86, Ack: 90, Len: 0`
21	33 bytes	`Telnet`
22	33 bytes	`Telnet`
23	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 87, Ack: 91, Len: 0`
24	33 bytes	`Telnet`
25	33 bytes	`Telnet`
26	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 88, Ack: 92, Len: 0`
27	33 bytes	`Telnet`
28	33 bytes	`Telnet`
29	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 89, Ack: 93, Len: 0`
30	33 bytes	`Telnet`
31	33 bytes	`Telnet`
32	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 90, Ack: 94, Len: 0`
33	34 bytes	`Telnet`
34	34 bytes	`Telnet`
35	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 92, Ack: 96, Len: 0`
36	42 bytes	`Telnet`
37	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 92, Ack: 106, Len: 0`
38	33 bytes	`Telnet`
39	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 93, Len: 0`
40	33 bytes	`Telnet`
41	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 94, Len: 0`
42	33 bytes	`Telnet`
43	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 95, Len: 0`
44	33 bytes	`Telnet`
45	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 96, Len: 0`
46	33 bytes	`Telnet`
47	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 97, Len: 0`
48	33 bytes	`Telnet`
49	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 98, Len: 0`
50	33 bytes	`Telnet`
51	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 99, Len: 0`
52	33 bytes	`Telnet`
53	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 100, Len: 0`
54	34 bytes	`Telnet`
55	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 106, Ack: 102, Len: 0`
56	34 bytes	`Telnet`
57	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 102, Ack: 108, Len: 0`
58	93 bytes	`Telnet`
59	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 102, Ack: 169, Len: 0`
60	771 bytes	`Telnet`
61	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 102, Ack: 908, Len: 0`
62	100 bytes	`Telnet`
63	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 102, Ack: 976, Len: 0`
64	33 bytes	`Telnet`
65	33 bytes	`Telnet`
66	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 103, Ack: 977, Len: 0`
67	33 bytes	`Telnet`
68	33 bytes	`Telnet`
69	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 104, Ack: 978, Len: 0`
70	33 bytes	`Telnet`
71	33 bytes	`Telnet`
72	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 105, Ack: 979, Len: 0`
73	33 bytes	`Telnet`
74	33 bytes	`Telnet`
75	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 106, Ack: 980, Len: 0`
76	34 bytes	`Telnet`
77	34 bytes	`Telnet`
78	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 108, Ack: 982, Len: 0`
79	40 bytes	`Telnet`
80	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 108, Ack: 990, Len: 0`
81	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 990, Ack: 108, Len: 0`
82	20 bytes	`Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 108, Ack: 991, Len: 0`
83	20 bytes	`Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 991, Ack: 109, Len: 0`

0000 df0e00177d31acaa 00000000a000aaaa
0010 00300000

0000 ß...}1¬ª......ªª
0010 .0..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 0, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 0 (relative sequence number)
- Acknowledgment number: 0
- 1010 .... = Header Length: 40 bytes (10)
- Window size value: 43690
- Calculated window size: 43690
- Checksum: 0x0030 [unverified]
- Urgent pointer: 0

0000 0017df0ee18fe348 7d31acaba000aaaa
0010 00300000

0000 ..ß.á.ãH}1¬«..ªª
0010 .0..

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 0, Ack: 1, Len: 0
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 0
- Sequence number: 0 (relative sequence number)
- Acknowledgment number: 1 (relative ack number)
- 1010 .... = Header Length: 40 bytes (10)
- Window size value: 43690
- Calculated window size: 43690
- Checksum: 0x0030 [unverified]
- Urgent pointer: 0

0000 df0e00177d31acab e18fe34980000156
0010 00280000

0000 ß...}1¬«á.ãI...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 1, Ack: 1, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 1 (relative sequence number)
- Acknowledgment number: 1 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31acab  e18fe34980000156
0010  0040000000000000  0000000000000000
0020  fffd03fffb18fffb  1ffffb20fffb21ff
0030  fb22fffb27fffd05

0000  ß...}1¬«á.ãI...V
0010  .@..............
0020  ÿý.ÿû.ÿû.ÿû ÿû!ÿ
0030  û"ÿû'ÿý.

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 1, Ack: 1, Len: 24
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 24
- Sequence number: 1 (relative sequence number)
- Acknowledgment number: 1 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0040 [unverified]
- Urgent pointer: 0
- TCP payload (24 bytes)
Telnet
- Do Suppress Go Ahead
  - Command: Do (253)
  - Subcommand: Suppress Go Ahead
- Will Terminal Type
  - Command: Will (251)
  - Subcommand: Terminal Type
- Will Negotiate About Window Size
  - Command: Will (251)
  - Subcommand: Negotiate About Window Size
- Will Terminal Speed
  - Command: Will (251)
  - Subcommand: Terminal Speed
- Will Remote Flow Control
  - Command: Will (251)
  - Subcommand: Remote Flow Control
- Will Linemode
  - Command: Will (251)
  - Subcommand: Linemode
- Will New Environment Option
  - Command: Will (251)
  - Subcommand: New Environment Option
- Do Status
  - Command: Do (253)
  - Subcommand: Status

0000 0017df0ee18fe349 7d31acc380000156
0010 00280000

0000 ..ß.á.ãI}1¬Ã...V
0010 .(..

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 1, Ack: 25, Len: 0
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 0
- Sequence number: 1 (relative sequence number)
- Acknowledgment number: 25 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  0017df0ee18fe349  7d31acc380000156
0010  0034000000000000  0000000000000000
0020  fffd18fffd20fffd  23fffd27

0000  ..ß.á.ãI}1¬Ã...V
0010  .4..............
0020  ÿý.ÿý ÿý#ÿý'

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 1, Ack: 25, Len: 12
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 12
- Sequence number: 1 (relative sequence number)
- Acknowledgment number: 25 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0034 [unverified]
- Urgent pointer: 0
- TCP payload (12 bytes)
Telnet
- Do Terminal Type
  - Command: Do (253)
  - Subcommand: Terminal Type
- Do Terminal Speed
  - Command: Do (253)
  - Subcommand: Terminal Speed
- Do X Display Location
  - Command: Do (253)
  - Subcommand: X Display Location
- Do New Environment Option
  - Command: Do (253)
  - Subcommand: New Environment Option

0000 df0e00177d31acc3 e18fe35580000156
0010 00280000

0000 ß...}1¬Ãá.ãU...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 25, Ack: 13, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 25 (relative sequence number)
- Acknowledgment number: 13 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  0017df0ee18fe355  7d31acc380000156
0010  0037000000000000  0000000000000000
0020  fffb03fffd1ffffd  21fffe22fffb05

0000  ..ß.á.ãU}1¬Ã...V
0010  .7..............
0020  ÿû.ÿý.ÿý!ÿþ"ÿû.

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 13, Ack: 25, Len: 15
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 15
- Sequence number: 13 (relative sequence number)
- Acknowledgment number: 25 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0037 [unverified]
- Urgent pointer: 0
- TCP payload (15 bytes)
Telnet
- Will Suppress Go Ahead
  - Command: Will (251)
  - Subcommand: Suppress Go Ahead
- Do Negotiate About Window Size
  - Command: Do (253)
  - Subcommand: Negotiate About Window Size
- Do Remote Flow Control
  - Command: Do (253)
  - Subcommand: Remote Flow Control
- Don't Linemode
  - Command: Don't (254)
  - Subcommand: Linemode
- Will Status
  - Command: Will (251)
  - Subcommand: Status

0000 df0e00177d31acc3 e18fe36480000156
0010 00280000

0000 ß...}1¬Ãá.ãd...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 25, Ack: 28, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 25 (relative sequence number)
- Acknowledgment number: 28 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31acc3  e18fe36480000156
0010  0034000000000000  0000000000000000
0020  fffc23fffa1f0050  0018fff0

0000  ß...}1¬Ãá.ãd...V
0010  .4..............
0020  ÿü#ÿú..P..ÿð

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 25, Ack: 28, Len: 12
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 12
- Sequence number: 25 (relative sequence number)
- Acknowledgment number: 28 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0034 [unverified]
- Urgent pointer: 0
- TCP payload (12 bytes)
Telnet
- Won't X Display Location
  - Command: Won't (252)
  - Subcommand: X Display Location
- Suboption Negotiate About Window Size
  - Command: Suboption (250)
  - Subcommand: Negotiate About Window Size
    - Width: 80
    - Height: 24
- Suboption End
  - Command: Suboption End (240)

0000 0017df0ee18fe364 7d31accf80000156
0010 00280000

0000 ..ß.á.ãd}1¬Ï...V
0010 .(..

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 28, Ack: 37, Len: 0
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 0
- Sequence number: 28 (relative sequence number)
- Acknowledgment number: 37 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  0017df0ee18fe364  7d31accf80000156
0010  003a000000000000  0000000000000000
0020  fffa2001fff0fffa  2701fff0fffa1801
0030  fff0

0000  ..ß.á.ãd}1¬Ï...V
0010  .:..............
0020  ÿú .ÿðÿú'.ÿðÿú..
0030  ÿð

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 28, Ack: 37, Len: 18
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 18
- Sequence number: 28 (relative sequence number)
- Acknowledgment number: 37 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x003a [unverified]
- Urgent pointer: 0
- TCP payload (18 bytes)
Telnet
- Suboption Terminal Speed
  - Command: Suboption (250)
  - Subcommand: Terminal Speed
    - Option data: 01
- Suboption End
  - Command: Suboption End (240)
- Suboption New Environment Option
  - Command: Suboption (250)
  - Subcommand: New Environment Option
    - Option data: 01
- Suboption End
  - Command: Suboption End (240)
- Suboption Terminal Type
  - Command: Suboption (250)
  - Subcommand: Terminal Type
    - Send your Terminal Type
- Suboption End
  - Command: Suboption End (240)

0000  df0e00177d31accf  e18fe37680000156
0010  0053000000000000  0000000000000000
0020  fffa200033383430  302c3338343030ff
0030  f0fffa2700fff0ff  fa1800787465726d
0040  2d323536636f6c6f  72fff0

0000  ß...}1¬Ïá.ãv...V
0010  .S..............
0020  ÿú .38400,38400ÿ
0030  ðÿú'.ÿðÿú..xterm
0040  -256colorÿð

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 37, Ack: 46, Len: 43
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 43
- Sequence number: 37 (relative sequence number)
- Acknowledgment number: 46 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0053 [unverified]
- Urgent pointer: 0
- TCP payload (43 bytes)
Telnet
- Suboption Terminal Speed
  - Command: Suboption (250)
  - Subcommand: Terminal Speed
    - Option data: 0033383430302c3338343030
- Suboption End
  - Command: Suboption End (240)
- Suboption New Environment Option
  - Command: Suboption (250)
  - Subcommand: New Environment Option
    - Option data: 00
- Suboption End
  - Command: Suboption End (240)
- Suboption Terminal Type
  - Command: Suboption (250)
  - Subcommand: Terminal Type
    - Here's my Terminal Type
    - Value: xterm-256color
- Suboption End
  - Command: Suboption End (240)

0000  0017df0ee18fe376  7d31acfa80000156
0010  002b000000000000  0000000000000000
0020  fffd01

0000  ..ß.á.ãv}1¬ú...V
0010  .+..............
0020  ÿý.

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 46, Ack: 80, Len: 3
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 3
- Sequence number: 46 (relative sequence number)
- Acknowledgment number: 80 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x002b [unverified]
- Urgent pointer: 0
- TCP payload (3 bytes)
Telnet
- Do Echo
  - Command: Do (253)
  - Subcommand: Echo

0000  df0e00177d31acfa  e18fe37980000156
0010  002b000000000000  0000000000000000
0020  fffc01

0000  ß...}1¬úá.ãy...V
0010  .+..............
0020  ÿü.

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 80, Ack: 49, Len: 3
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 3
- Sequence number: 80 (relative sequence number)
- Acknowledgment number: 49 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x002b [unverified]
- Urgent pointer: 0
- TCP payload (3 bytes)
Telnet
- Won't Echo
  - Command: Won't (252)
  - Subcommand: Echo

0000  0017df0ee18fe379  7d31acfd80000156
0010  002b000000000000  0000000000000000
0020  fffb01

0000  ..ß.á.ãy}1¬ý...V
0010  .+..............
0020  ÿû.

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 49, Ack: 83, Len: 3
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 3
- Sequence number: 49 (relative sequence number)
- Acknowledgment number: 83 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x002b [unverified]
- Urgent pointer: 0
- TCP payload (3 bytes)
Telnet
- Will Echo
  - Command: Will (251)
  - Subcommand: Echo

0000  df0e00177d31acfd  e18fe37c80000156
0010  002b000000000000  0000000000000000
0020  fffd01

0000  ß...}1¬ýá.ã|...V
0010  .+..............
0020  ÿý.

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 83, Ack: 52, Len: 3
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 3
- Sequence number: 83 (relative sequence number)
- Acknowledgment number: 52 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x002b [unverified]
- Urgent pointer: 0
- TCP payload (3 bytes)
Telnet
- Do Echo
  - Command: Do (253)
  - Subcommand: Echo

0000  0017df0ee18fe37c  7d31ad0080000156
0010  003c000000000000  0000000000000000
0020  5562756e74752031  382e30342e33204c
0030  54530d0a

0000  ..ß.á.ã|}1.....V
0010  .<..............
0020  Ubuntu 18.04.3 L
0030  TS..

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 52, Ack: 86, Len: 20
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 20
- Sequence number: 52 (relative sequence number)
- Acknowledgment number: 86 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x003c [unverified]
- Urgent pointer: 0
- TCP payload (20 bytes)
Telnet
- Data: Ubuntu 18.04.3 LTS\r\n

0000 df0e00177d31ad00 e18fe39080000156
0010 00280000

0000 ß...}1..á.ã....V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 86, Ack: 72, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 86 (relative sequence number)
- Acknowledgment number: 72 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  0017df0ee18fe390  7d31ad0080000156
0010  003a000000000000  0000000000000000
0020  6f626f2d6d696e69  7063206c6f67696e
0030  3a20

0000  ..ß.á.ã.}1.....V
0010  .:..............
0020  obo-minipc login
0030  :

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 72, Ack: 86, Len: 18
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 18
- Sequence number: 72 (relative sequence number)
- Acknowledgment number: 86 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x003a [unverified]
- Urgent pointer: 0
- TCP payload (18 bytes)
Telnet
- Data: obo-minipc login:

0000 df0e00177d31ad00 e18fe3a280000156
0010 00280000

0000 ß...}1..á.ã¢...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 86, Ack: 90, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 86 (relative sequence number)
- Acknowledgment number: 90 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31ad00  e18fe3a280000156
0010  0029000000000000  0000000000000000
0020  74

0000  ß...}1..á.ã¢...V
0010  .)..............
0020  t

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 86, Ack: 90, Len: 1
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 1
- Sequence number: 86 (relative sequence number)
- Acknowledgment number: 90 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: t

0000  0017df0ee18fe3a2  7d31ad0180000156
0010  0029000000000000  0000000000000000
0020  74

0000  ..ß.á.ã¢}1.....V
0010  .)..............
0020  t

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 90, Ack: 87, Len: 1
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 1
- Sequence number: 90 (relative sequence number)
- Acknowledgment number: 87 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: t

0000 df0e00177d31ad01 e18fe3a380000156
0010 00280000

0000 ß...}1..á.ã£...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 87, Ack: 91, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 87 (relative sequence number)
- Acknowledgment number: 91 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31ad01  e18fe3a380000156
0010  0029000000000000  0000000000000000
0020  65

0000  ß...}1..á.ã£...V
0010  .)..............
0020  e

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 87, Ack: 91, Len: 1
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 1
- Sequence number: 87 (relative sequence number)
- Acknowledgment number: 91 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: e

0000  0017df0ee18fe3a3  7d31ad0280000156
0010  0029000000000000  0000000000000000
0020  65

0000  ..ß.á.ã£}1.....V
0010  .)..............
0020  e

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 91, Ack: 88, Len: 1
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 1
- Sequence number: 91 (relative sequence number)
- Acknowledgment number: 88 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: e

0000 df0e00177d31ad02 e18fe3a480000156
0010 00280000

0000 ß...}1..á.ã¤...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 88, Ack: 92, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 88 (relative sequence number)
- Acknowledgment number: 92 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31ad02  e18fe3a480000156
0010  0029000000000000  0000000000000000
0020  73

0000  ß...}1..á.ã¤...V
0010  .)..............
0020  s

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 88, Ack: 92, Len: 1
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 1
- Sequence number: 88 (relative sequence number)
- Acknowledgment number: 92 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: s

0000  0017df0ee18fe3a4  7d31ad0380000156
0010  0029000000000000  0000000000000000
0020  73

0000  ..ß.á.ã¤}1.....V
0010  .)..............
0020  s

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 92, Ack: 89, Len: 1
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 1
- Sequence number: 92 (relative sequence number)
- Acknowledgment number: 89 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: s

0000 df0e00177d31ad03 e18fe3a580000156
0010 00280000

0000 ß...}1..á.ã¥...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 89, Ack: 93, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 89 (relative sequence number)
- Acknowledgment number: 93 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31ad03  e18fe3a580000156
0010  0029000000000000  0000000000000000
0020  74

0000  ß...}1..á.ã¥...V
0010  .)..............
0020  t

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 89, Ack: 93, Len: 1
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 1
- Sequence number: 89 (relative sequence number)
- Acknowledgment number: 93 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: t

0000  0017df0ee18fe3a5  7d31ad0480000156
0010  0029000000000000  0000000000000000
0020  74

0000  ..ß.á.ã¥}1.....V
0010  .)..............
0020  t

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 93, Ack: 90, Len: 1
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 1
- Sequence number: 93 (relative sequence number)
- Acknowledgment number: 90 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: t

0000 df0e00177d31ad04 e18fe3a680000156
0010 00280000

0000 ß...}1..á.ã¦...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 90, Ack: 94, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 90 (relative sequence number)
- Acknowledgment number: 94 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31ad04  e18fe3a680000156
0010  002a000000000000  0000000000000000
0020  0d00

0000  ß...}1..á.ã¦...V
0010  .*..............
0020  ..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 90, Ack: 94, Len: 2
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 2
- Sequence number: 90 (relative sequence number)
- Acknowledgment number: 94 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x002a [unverified]
- Urgent pointer: 0
- TCP payload (2 bytes)
Telnet
- Data: \r

0000  0017df0ee18fe3a6  7d31ad0680000156
0010  002a000000000000  0000000000000000
0020  0d0a

0000  ..ß.á.ã¦}1.....V
0010  .*..............
0020  ..

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 94, Ack: 92, Len: 2
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 2
- Sequence number: 94 (relative sequence number)
- Acknowledgment number: 92 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x002a [unverified]
- Urgent pointer: 0
- TCP payload (2 bytes)
Telnet
- Data: \r\n

0000 df0e00177d31ad06 e18fe3a880000156
0010 00280000

0000 ß...}1..á.ã¨...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 92, Ack: 96, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 92 (relative sequence number)
- Acknowledgment number: 96 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  0017df0ee18fe3a8  7d31ad0680000156
0010  0032000000000000  0000000000000000
0020  50617373776f7264  3a20

0000  ..ß.á.ã¨}1.....V
0010  .2..............
0020  Password:

Transmission Control Protocol, Src Port: 23, Dst Port: 57102, Seq: 96, Ack: 92, Len: 10
- Source Port: 23
- Destination Port: 57102
- TCP Segment Len: 10
- Sequence number: 96 (relative sequence number)
- Acknowledgment number: 92 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0032 [unverified]
- Urgent pointer: 0
- TCP payload (10 bytes)
Telnet
- Data: Password:

0000 df0e00177d31ad06 e18fe3b280000156
0010 00280000

0000 ß...}1..á.ã²...V
0010 .(..

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 92, Ack: 106, Len: 0
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 0
- Sequence number: 92 (relative sequence number)
- Acknowledgment number: 106 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0028 [unverified]
- Urgent pointer: 0

0000  df0e00177d31ad06  e18fe3b280000156
0010  0029000000000000  0000000000000000
0020  74

0000  ß...}1..á.ã²...V
0010  .)..............
0020  t

Transmission Control Protocol, Src Port: 57102, Dst Port: 23, Seq: 92, Ack: 106, Len: 1
- Source Port: 57102
- Destination Port: 23
- TCP Segment Len: 1
- Sequence number: 92 (relative sequence number)
- Acknowledgment number: 106 (relative ack number)
- 1000 .... = Header Length: 32 bytes (8)
- Window size value: 342
- Calculated window size: 43776
- Window size scaling factor: 128
- Checksum: 0x0029 [unverified]
- Urgent pointer: 0
- TCP payload (1 byte)
Telnet
- Data: t

0000 0017df0ee18fe3b2 7d31ad0780000156
0010 00280000