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TCP Dscp class of the packet

Posted on 2012-03-31
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Last Modified: 2012-03-31
What is the dscp class of this packet or tos number ?


0021 563e 9cc3 748e f82a 3500 0800 4500  .!V>..t..*5...E.
0030 9722 4000 7506 76d0 464c 2b4b 257b  .0."@.u.v.FL+K%{
60c3 280a 0050 ffc8 696a 97fc 455b 7002  `.(..P..ij..E[p.
2000 fc64 0000 0204 05b4 0101 0402        ..d..........

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Question by:3XLcom
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7 Comments
 
LVL 35

Accepted Solution

by:
Ernie Beek earned 500 total points
ID: 37791821
Let's see:

Packet Info:
    Packet Number:                      000001
    Packet Length:                      67
    Captured Length:                    63
    Delta Time                          0.100000 Second
Ethernet Type II                        [0/14]
    Destination Address:                00:21:56:3E:9C:C3  [0/6]
    Source Address:                     74:8E:F8:2A:35:00  [6/6]
    Protocol:                           0x0800  (Internet IP(IPv4))  [12/2]
IP - Internet Protocol                  [14/20]
    Version                             4  [14/1]  0x00F0
    Header Length                       5  (20 Bytes)  [14/1]  0x000F
    Differentiated Services Field       0000 0000  [15/1]  0x00FF
        Differentiated Services Codepoint0000 00..  [15/1]  0x00FC
        Transport Protocol will ignore the CE bit.... ..0.  (Ignore)  [15/1]  0x0002
        Congestion                      .... ...0  (No Congestion)  [15/1]  0x0001
    Total Length                        48  (48 Bytes)  [16/2]
    Identification                      0x9722  (38690)  [18/2]
    Fragment Flags                      010. ....  (Don't Fragment)  [20/1]  0x00E0
        Reserved                        0... ....  [20/1]  0x0080
        Fragment                        .1.. ....  (Don't Fragment)  [20/1]  0x0040
        More Fragment                   ..0. ....  (Last Fragment)  [20/1]  0x0020
    Fragment Offset                     0  [20/2]  0x1FFF
    Time To Live                        117  [22/1]
    Protocol                            6  (TCP)  [23/1]
    Checksum                            0x76D0  (Correct)  [24/2]
    Source IP                           70.76.43.75  [26/4]
    Destination IP                      37.123.96.195  [30/4]
TCP - Transport Control Protocol        [34/28]
    Source Port:                        10250  [34/2]
    Destination Port:                   80  [36/2]
    Sequence Number:                    4291324266  [38/4]
    Ack Number:                         2549892443  [42/4]
    TCP Offset:                         7  (28 Bytes)  [46/1]  0x00F0
    Flags:                              ..00 0010  [47/1]  0x003F
        Urgent pointer:                 ..0. ....  [47/1]  0x0020
        Acknowledgment number:          ...0 ....  [47/1]  0x0010
        Push Function:                  .... 0...  [47/1]  0x0008
        Reset the connection:           .... .0..  [47/1]  0x0004
        Synchronize sequence:           .... ..1.  [47/1]  0x0002
        End of data:                    .... ...0  [47/1]  0x0001
    Window:                             8192  [48/2]
    Checksum:                           0xFC64  (Correct)  [50/2]
    Urgent point:                       0  [52/2]
    TCP Option - 1                      [54/4]
        Code:                           2  [54/1]
        Length:                         4  [55/1]
        Maximum Segment Length:         1460  [56/2]
    TCP Option - 2                      [58/1]
        Code:                           1  [58/1]
    TCP Option - 3                      [59/1]
        Code:                           1  [59/1]
    TCP Option - 4                      [60/2]
        Code:                           4  [60/1]
        Length:                         2  [61/1]
Extra Data:                             [62/1]
    Number of Bytes:                    1 bytes  [62/1]
FCS:
    FCS:                                0x2FA24C7A

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So as you can see the dscp is 0
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Author Comment

by:3XLcom
ID: 37791943
How did you convert this packet to this :) i really want to know.
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LVL 35

Expert Comment

by:Ernie Beek
ID: 37791947
Colasoft packet builder: http://www.colasoft.com/packet_builder/ 
Have fun ;)
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Author Comment

by:3XLcom
ID: 37791950
And i want to know if there is a way to block this type of packets on the router.
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Author Closing Comment

by:3XLcom
ID: 37791959
Thank you millions of time
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LVL 35

Expert Comment

by:Ernie Beek
ID: 37791963
Is this related to your other question by any chance? The one with the TTL?
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Author Comment

by:3XLcom
ID: 37791987
:( unfortunately my router does not has a ttl block support and / also my juniper is not have a capability to got 500k+ packets
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