Find the answer to your Linux question:
Results 1 to 3 of 3
Hello. I'm taking steps to improve my anonymity and I noticed something in a dhcp request while looking at wireshark: Code: 0090 00 00 00 00 00 00 00 00 ...
Enjoy an ad free experience by logging in. Not a member yet? Register.
  1. #1
    Just Joined!
    Join Date
    Jun 2012
    Posts
    37

    Transmitting sensitive information


    Hello. I'm taking steps to improve my anonymity and I noticed something in a dhcp request while looking at wireshark:

    Code:
    0090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    00a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    00b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    00c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    00d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    00e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    00f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    0100  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
    0110  00 00 00 00 00 00 63 82  53 63 35 01 03 32 04 0a   ......c. Sc5..2..
    0120  00 00 10 39 02 05 dc 3c  34 64 68 63 70 63 64 2d   ...9...< 4dhcpcd-
    0130  35 2e 36 2e 33 3a 4c 69  6e 75 78 2d 33 2e 36 2e   5.6.3:Li nux-3.6.
    0140  31 31 2d 31 2d 41 52 43  48 3a 78 38 36 5f 36 34   11-1-ARC H:x86_64
    0150  3a 47 65 6e 75 69 6e 65  49 6e 74 65 6c 0c 07 6d   :Genuine Intel..m
    0160  61 63 68 69 6e 65 37 0f  01 79 21 03 06 0c 0f 1a   achine7. .y!.....
    0170  1c 2a 33 36 3a 3b 77 ff                            .*36:;w.

    When I analyze the packet further I notice it shows my whole kernel version and architecture as well as my dhcp version and hostname. That's obviously bad for ones anonymity and I was wondering a way to avoid transmitting this information.

    Thanks.

  2. #2
    Linux User Steven_G's Avatar
    Join Date
    Jun 2012
    Location
    Western US
    Posts
    377
    Encryption.

    There are lots of solutions.

    I personally chose to pay for a subscription to a remote / secure proxy server that uses OpenVPN to etablish the tunnel.

    You can build your own VPN. But, I'm still learning. I went this route to start b/c there's no setup or hardware involved and almost no configuration involved; import a few keys, fill in a few blanks, check a couple of boxes and done.

    Eventually I want to build my own VPN.

    I'm not sure what forums' policy is on plugging retail items. Drop me a PM and I'll send you a link to the service I chose.

  3. #3
    Linux Engineer Kloschüssel's Avatar
    Join Date
    Oct 2005
    Location
    Italy
    Posts
    773
    I looked over the DHCP protocol specification and such kind of data is only mentioned as DHCP extensions. Maybe you are able to reconfigure your DHCP client software to not use extensions? Beware: there are lots of ways to determine information about a computer. Take a tour to nmap how they find out data. Hardening your computer against those strategies is a good start. Anyway I wouldn't go any further as all this work consumes (i.e. wastes) too much time and effort. It's better to spend more time in the firewall configuration.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •