Information

Author(s) Olivier Bonaventure
Deadline No deadline
Submission limit No limitation
Category tags ssh

Tags

Sign in

ssh and compression


Question 1: Affirmations

Looking at the trace above, select the affirmations below that are correct.

Question 2: A simple ssh trace

The attached packet trace was collected on a Linux server. In the ssh protocol, the client and the server can request that data be compressed before encryption. This can be useful to speedup transfers in low speed networks. To negotiate the compression scheme, the client and the servers propose an ordered list in the KeyExchangeInit message.


0000  b66e001652a3a7a6  00000000a000aaaa  
0010  00300000                            

0000  n..R£§¦......ªª
0010  .0..            
  • Transmission Control Protocol, Src Port: 46702, Dst Port: 22, Seq: 0, Len: 0
    • Source Port: 46702
      • Destination Port: 22
        • 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