XDMCP over SSH ? / xnest

$ sudo apt-get install xnest Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed:   xnest 0 upgraded, 1 newly installed, 0 to remove and 147 not upgraded. Need to get 785 kB of archives. After this operation, 1,930 kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu/ precise-updates/main xnest amd64 2:1.11.4-0ubuntu10.17 [785 kB] Fetched 785 kB in 2s (356 kB/s) Selecting previously unselected package xnest. (Reading database ... 215036 files and directories currently installed.) Unpacking xnest (from .../xnest_2%3a1.11.4-0ubuntu10.17_amd64.deb) ... Processing triggers for man-db ... Setting up xnest (2:1.11.4-0ubuntu10.17) ...

$ ssh -Y remote_hostname_or_ip_address Xnest :1 -query localhost [링크 : http://x.cygwin.com/docs/ug/using-remote-session.html]

암호화 지원하지 않아 안전하지 않다라...

XDMCP is inherently insecure as it does not encrypt your traffic. XDMCP is analogous to telnet, and therefore they share the same security issues. 

[링크 : https://wiki.ubuntu.com/xdmcp]

netsarang의 Xmanager는 XDMCP를 자체 지원하는데..

2단계 거쳐서 하라는거 보면 putty의 X11 포워딩 삘이..

[링크 : https://www.netsarang.com/tutorial/xmanager/3270/title]

아무튼 실험해보니..

putty + Xming으로

arcfour 설정해주니 썩 나쁘지 않은 속도로 반응

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스트림 사이퍼.. 블록이 아니라 더 빠르게 응답하는 걸려나?

[링크 : https://en.wikipedia.org/wiki/RC4]

Update: Ben Harris has written an Internet-Draft (draft-harris-ssh-arcfour-fixes, now RFC 4345) describing a way of using Arcfour reasonably securely with SSH-2, and PuTTY now implements this. Note that this document defines the "arcfour256" and "arcfour128" ciphers; PuTTY still does not support the less secure "arcfour" cipher, and we have no plans to make it do so.

(Support was first added in 2005-04-22, but uonly under private names defined in an earlier draft: "arcfour256-draft-00@putty.projects.tartarus.org" and so on. Only from 2005-09-04 do we support the IETF names, which also appear in OpenSSH from 4.2.)

[링크 : http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/arcfour.html]

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엥 다시 실행해보니..

XDMCP 보다 오히려 arcfour가 빠른 느낌이다 ㄷㄷ

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[링크 : http://linux.die.net/man/1/xnest]

[링크 : http://www.x.org/archive/X11R7.5/doc/man/man1/Xnest.1.html]

[링크 : https://en.wikipedia.org/wiki/Xnest]

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xnest의 사용법의 예제...?

일종의 vm 처럼 보이는 기분 ㅋㅋㅋ

$ Xnest :1 -query localhost -geometry 1024x768

[링크 : http://www.idevelopment.info/data/Unix/Linux/LINUX_ConfiguringXDMCPRedHatLinux.shtml]