Comments for WPKG Blog http://blog.wpkg.org a technical IT blog Fri, 13 Jan 2012 23:16:03 +0000 http://wordpress.org/?v=2.9.2 hourly 1 Comment on Getting rid of “IPv6 addrconf: prefix with wrong length 56″ by frankhttp://blog.wpkg.org/2011/07/07/getting-rid-of-ipv6-addrconf-prefix-with-wrong-length-56/comment-page-1/#comment-5008 frank Fri, 13 Jan 2012 23:16:03 +0000 http://blog.wpkg.org/?p=292#comment-5008 thank you! worked on CentOs5.6 and Debian6.0 thank you! worked on CentOs5.6 and Debian6.0

]]> Comment on Setting up DKIMproxy with Exim for DKIM and DomainKeys signing by DKIM addon for cpanel (WORKING) « EmailGodshttp://blog.wpkg.org/2009/03/28/setting-up-dkimproxy-with-exim-for-dkim-and-domainkeys-signing/comment-page-1/#comment-4959 DKIM addon for cpanel (WORKING) « EmailGods Fri, 16 Dec 2011 07:15:40 +0000 http://blog.wpkg.org/?p=54#comment-4959 [...] http://blog.wpkg.org/2009/03/28/setting-up-dkimproxy-with-exim-for-dkim-and-domainkeys-signing/ http://sourceforge.net/projects/dkimproxy/files/latest/download [...] [...] http://blog.wpkg.org/2009/03/28/setting-up-dkimproxy-with-exim-for-dkim-and-domainkeys-signing/ http://sourceforge.net/projects/dkimproxy/files/latest/download [...]

]]> Comment on Cipher benchmark for dm-crypt / LUKS by Flyerhttp://blog.wpkg.org/2009/04/23/cipher-benchmark-for-dm-crypt-luks/comment-page-1/#comment-4901 Flyer Sat, 03 Dec 2011 13:56:38 +0000 http://blog.wpkg.org/?p=70#comment-4901 CentOS 6 (2.6.32-71.29.1.el6.x86_64) with 16GB RAM (RAM-disk 11GB, file 10GB) - VM (only single)on ESXi5, 2 x Xeon E5530 48GB RAMScript from Heikki Salokanto, modifyed (error-control)Options (mode) Write Read default (aes-cbc-essiv:sha256 256) 82.77 102.76 -c aes (cbc-plain 256) 82.00 105.79 -c aes -s 128 (cbc-plain) 104.91 139.99 -c aes-ecb -s 128 121.56 151.59 -c aes-cbc-null -s 128 100.85 139.72 -c aes-cbc-plain -s 128 100.97 139.70 -c aes-cbc-benbi -s 128 100.71 139.66 -c aes-cbc-essiv:sha256 -s 128 98.02 134.77 -c aes-pcbc-null -s 128 95.89 105.71 -c aes-pcbc-plain -s 128 98.59 105.63 -c aes-pcbc-benbi -s 128 94.13 105.62 -c aes-pcbc-essiv:sha256 -s 128 95.51 102.86 -c aes-ctr-plain -s 128 111.94 137.34 -c aes -s 256 (cbc-plain) 83.59 105.71 -c aes-ecb -s 256 96.98 112.92 -c aes-cbc-null -s 256 84.46 105.69 -c aes-cbc-plain -s 256 84.22 105.70 -c aes-cbc-plain64 -s 256 80.44 105.73 -c aes-cbc-benbi -s 256 81.42 105.47 -c aes-cbc-essiv:sha256 -s 256 78.61 102.98 -c aes-pcbc-null -s 256 80.89 84.52 -c aes-pcbc-plain -s 256 80.37 84.62 -c aes-pcbc-plain64 -s 256 76.38 84.52 -c aes-pcbc-benbi -s 256 79.83 84.62 -c aes-pcbc-essiv:sha256 -s 256 75.48 82.71 -c aes-lrw-null -s 256 (128) 108.64 132.97 -c aes-lrw-plain -s 256 (128) 111.43 132.99 -c aes-lrw-plain64 -s 256 (128) 111.95 133.11 -c aes-lrw-benbi -s 256 (128) 111.83 133.26 -c aes-lrw-essiv:sha256 -s 256 (128) 104.83 127.86 -c aes-lrw-null -s 384 (256) 82.58 102.08 -c aes-lrw-plain -s 384 (256) 86.82 101.99 -c aes-lrw-plain64 -s 384 (256) 82.12 101.76 -c aes-lrw-benbi -s 384 (256) 86.64 102.04 -c aes-lrw-essiv:sha256 -s 384 (256) 84.30 98.58 -c aes-xts-null -s 256 (128) 112.00 137.21 -c aes-xts-plain -s 256 (128) 111.06 137.08 -c aes-xts-plain64 -s 256 (128) 109.64 136.95 -c aes-xts-benbi -s 256 (128) 113.97 137.12 -c aes-xts-essiv:sha256 -s 256 (128) 104.28 132.15 -c aes-xts-null -s 512 (256) 85.78 104.07 -c aes-xts-plain -s 512 (256) 88.78 103.80 -c aes-xts-plain64 -s 512 (256) 87.89 103.86 -c aes-xts-benbi -s 512 (256) 90.01 103.76 -c aes-xts-essiv:sha256 -s 512 (256) 85.81 101.25 -c aes-ctr-null -s 256 86.65 103.91 -c aes-ctr-plain -s 256 86.33 103.99 -c aes-ctr-plain64 -s 256 88.17 104.15 -c aes-ctr-benbi -s 256 85.65 103.93 -c aes-ctr-essiv:sha256 -s 256 87.09 101.47 -c des-ecb-plain -s 64 44.21 48.53 -c anubis -s 128 (cbc-plain) 84.57 106.66 -c anubis-ecb-plain -s 128 92.04 114.43 -c anubis-cbc-plain -s 128 79.48 104.86 -c anubis -s 256 (cbc-plain) 67.69 84.64 -c anubis-ecb-plain -s 256 75.93 90.33 -c anubis-cbc-plain -s 256 66.87 83.70 -c blowfish (cbc-plain 256) 62.40 85.50 -c blowfish-ecb-plain (256) 72.29 92.52 -c blowfish-cbc-plain (256) 61.70 85.49 -c blowfish-cbc-essiv:sha256 -s 256 63.32 84.16 -c twofish (cbc-plain 256) 88.63 116.51 -c twofish-cbc-essiv:sha256 -s 256 86.34 113.89 -c twofish-lrw-essiv:sha256 -s 256 (128) 84.76 109.01 -c twofish-xts-essiv:sha256 -s 256 (128) 88.70 111.03 -c twofish-xts-essiv:sha256 -s 512 (256) 91.41 111.04 -c camellia -s 128 (cbc-plain) 76.31 97.80 -c camellia -s 256 (cbc-plain) 61.67 75.75 -c cast5-cbc-plain -s 128 58.21 77.55 -c cast6 (cbc-plain 256) 49.44 55.25 -c cast6-cbc-plain -s 256 48.71 55.37 -c tea-ecb-plain -s 128 36.55 37.92 -c xtea-ecb-plain -s 128 38.67 42.21 -c tnepres (cbc-plain 256) 41.03 48.71 -c serpent (cbc-plain 256) 42.92 51.05 -c khazad-ecb-plain -s 128 95.62 115.29 -c xeta-ecb-plain -s 128 44.55 45.30 -c fcrypt-pcbc-plain -s 64 58.96 64.30 CentOS 6 (2.6.32-71.29.1.el6.x86_64) with 16GB RAM (RAM-disk 11GB, file 10GB)
– VM (only single)on ESXi5, 2 x Xeon E5530 48GB RAM

Script from Heikki Salokanto, modifyed (error-control)

Options (mode) Write Read
default (aes-cbc-essiv:sha256 256) 82.77 102.76
-c aes (cbc-plain 256) 82.00 105.79
-c aes -s 128 (cbc-plain) 104.91 139.99
-c aes-ecb -s 128 121.56 151.59
-c aes-cbc-null -s 128 100.85 139.72
-c aes-cbc-plain -s 128 100.97 139.70
-c aes-cbc-benbi -s 128 100.71 139.66
-c aes-cbc-essiv:sha256 -s 128 98.02 134.77
-c aes-pcbc-null -s 128 95.89 105.71
-c aes-pcbc-plain -s 128 98.59 105.63
-c aes-pcbc-benbi -s 128 94.13 105.62
-c aes-pcbc-essiv:sha256 -s 128 95.51 102.86
-c aes-ctr-plain -s 128 111.94 137.34
-c aes -s 256 (cbc-plain) 83.59 105.71
-c aes-ecb -s 256 96.98 112.92
-c aes-cbc-null -s 256 84.46 105.69
-c aes-cbc-plain -s 256 84.22 105.70
-c aes-cbc-plain64 -s 256 80.44 105.73
-c aes-cbc-benbi -s 256 81.42 105.47
-c aes-cbc-essiv:sha256 -s 256 78.61 102.98
-c aes-pcbc-null -s 256 80.89 84.52
-c aes-pcbc-plain -s 256 80.37 84.62
-c aes-pcbc-plain64 -s 256 76.38 84.52
-c aes-pcbc-benbi -s 256 79.83 84.62
-c aes-pcbc-essiv:sha256 -s 256 75.48 82.71
-c aes-lrw-null -s 256 (128) 108.64 132.97
-c aes-lrw-plain -s 256 (128) 111.43 132.99
-c aes-lrw-plain64 -s 256 (128) 111.95 133.11
-c aes-lrw-benbi -s 256 (128) 111.83 133.26
-c aes-lrw-essiv:sha256 -s 256 (128) 104.83 127.86
-c aes-lrw-null -s 384 (256) 82.58 102.08
-c aes-lrw-plain -s 384 (256) 86.82 101.99
-c aes-lrw-plain64 -s 384 (256) 82.12 101.76
-c aes-lrw-benbi -s 384 (256) 86.64 102.04
-c aes-lrw-essiv:sha256 -s 384 (256) 84.30 98.58
-c aes-xts-null -s 256 (128) 112.00 137.21
-c aes-xts-plain -s 256 (128) 111.06 137.08
-c aes-xts-plain64 -s 256 (128) 109.64 136.95
-c aes-xts-benbi -s 256 (128) 113.97 137.12
-c aes-xts-essiv:sha256 -s 256 (128) 104.28 132.15
-c aes-xts-null -s 512 (256) 85.78 104.07
-c aes-xts-plain -s 512 (256) 88.78 103.80
-c aes-xts-plain64 -s 512 (256) 87.89 103.86
-c aes-xts-benbi -s 512 (256) 90.01 103.76
-c aes-xts-essiv:sha256 -s 512 (256) 85.81 101.25
-c aes-ctr-null -s 256 86.65 103.91
-c aes-ctr-plain -s 256 86.33 103.99
-c aes-ctr-plain64 -s 256 88.17 104.15
-c aes-ctr-benbi -s 256 85.65 103.93
-c aes-ctr-essiv:sha256 -s 256 87.09 101.47
-c des-ecb-plain -s 64 44.21 48.53
-c anubis -s 128 (cbc-plain) 84.57 106.66
-c anubis-ecb-plain -s 128 92.04 114.43
-c anubis-cbc-plain -s 128 79.48 104.86
-c anubis -s 256 (cbc-plain) 67.69 84.64
-c anubis-ecb-plain -s 256 75.93 90.33
-c anubis-cbc-plain -s 256 66.87 83.70
-c blowfish (cbc-plain 256) 62.40 85.50
-c blowfish-ecb-plain (256) 72.29 92.52
-c blowfish-cbc-plain (256) 61.70 85.49
-c blowfish-cbc-essiv:sha256 -s 256 63.32 84.16
-c twofish (cbc-plain 256) 88.63 116.51
-c twofish-cbc-essiv:sha256 -s 256 86.34 113.89
-c twofish-lrw-essiv:sha256 -s 256 (128) 84.76 109.01
-c twofish-xts-essiv:sha256 -s 256 (128) 88.70 111.03
-c twofish-xts-essiv:sha256 -s 512 (256) 91.41 111.04
-c camellia -s 128 (cbc-plain) 76.31 97.80
-c camellia -s 256 (cbc-plain) 61.67 75.75
-c cast5-cbc-plain -s 128 58.21 77.55
-c cast6 (cbc-plain 256) 49.44 55.25
-c cast6-cbc-plain -s 256 48.71 55.37
-c tea-ecb-plain -s 128 36.55 37.92
-c xtea-ecb-plain -s 128 38.67 42.21
-c tnepres (cbc-plain 256) 41.03 48.71
-c serpent (cbc-plain 256) 42.92 51.05
-c khazad-ecb-plain -s 128 95.62 115.29
-c xeta-ecb-plain -s 128 44.55 45.30
-c fcrypt-pcbc-plain -s 64 58.96 64.30

]]> Comment on Cipher benchmark for dm-crypt / LUKS by Heikki Salokantohttp://blog.wpkg.org/2009/04/23/cipher-benchmark-for-dm-crypt-luks/comment-page-1/#comment-4795 Heikki Salokanto Sun, 30 Oct 2011 20:46:53 +0000 http://blog.wpkg.org/?p=70#comment-4795 Hi,I ran a few tests on my Atom D525 (dual core 1.8 GHz) NAS box. It is running Ubuntu 11.04, Linux 2.6.38-8. There's 4 GB of RAM, of which I used ~1 GB to create a ramdisk for the tests.The script is at http://www.salokanto.fi/linux/test-crypt-perf.sh. It's not pretty, but you can modify it for your needs.Results (in MiB/s):<code> Options Write Read -c aes-xts-plain -s 256 45.53 43.89 -c aes-cbc-essiv:sha256 -s 128 44.89 45.33 -c aes-xts-plain -s 384 46.55 38.61 -c aes-cbc-essiv:sha256 -s 192 33.56 39.07 -c aes-xts-plain -s 512 41.11 36.15 -c aes-cbc-essiv:sha256 -s 256 31.01 36.13 </code>My understanding is that xts-plain must use double the key length compared to that of aes-cbc-essiv:sha256 in order to attain similar strength. Hi,

I ran a few tests on my Atom D525 (dual core 1.8 GHz) NAS box. It is running Ubuntu 11.04, Linux 2.6.38-8. There’s 4 GB of RAM, of which I used ~1 GB to create a ramdisk for the tests.

The script is at http://www.salokanto.fi/linux/test-crypt-perf.sh. It’s not pretty, but you can modify it for your needs.

Results (in MiB/s):


Options Write Read
-c aes-xts-plain -s 256 45.53 43.89
-c aes-cbc-essiv:sha256 -s 128 44.89 45.33
-c aes-xts-plain -s 384 46.55 38.61
-c aes-cbc-essiv:sha256 -s 192 33.56 39.07
-c aes-xts-plain -s 512 41.11 36.15
-c aes-cbc-essiv:sha256 -s 256 31.01 36.13

My understanding is that xts-plain must use double the key length compared to that of aes-cbc-essiv:sha256 in order to attain similar strength.

]]> Comment on Cipher benchmark for dm-crypt / LUKS by Aaron Toponcehttp://blog.wpkg.org/2009/04/23/cipher-benchmark-for-dm-crypt-luks/comment-page-1/#comment-4767 Aaron Toponce Sun, 16 Oct 2011 14:25:18 +0000 http://blog.wpkg.org/?p=70#comment-4767 Even though ECB is a speed demon in terms of encryption, you should strongly avoid using it. https://secure.wikimedia.org/wikipedia/en/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29 explains why, and gives a good demonstration. And because the first parts of the disk clearly show the algorithm, key size and hash used, it shouldn't even be an option, IMO.Check out the first part of an aes-ebc-null disk with a 128 byte key:<pre>0000000: 4c55 4b53 babe 0001 6165 7300 0000 0000 LUKS....aes..... 0000010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0000020: 0000 0000 0000 0000 6563 622d 6e75 6c6c ........ecb-null 0000030: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0000040: 0000 0000 0000 0000 7368 6131 0000 0000 ........sha1.... 0000050: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0000060: 0000 0000 0000 0000 0000 0800 0000 0010 ................ 0000070: 3ee5 e173 f1c9 1241 5eb8 da2e 4e96 5851 >..s...A^...N.XQ 0000080: d788 8016 447d 83ab 3d51 6fdb d077 c6fb ....D}..=Qo..w.. 0000090: 4059 74f3 07da f0b0 1743 1eb0 11d5 7ebb @Yt......C....~. 00000a0: 5fba 2011 0000 631f 6331 6138 3262 6564 _. ...c.c1a82bed 00000b0: 2d33 3661 362d 3464 3337 2d61 3863 612d -36a6-4d37-a8ca- 00000c0: 3032 3065 3233 3965 3062 6362 0000 0000 020e239e0bcb.... 00000d0: 00ac 71f3 0001 8dbc 598d f82b 50a4 a973 ..q.....Y..+P..s 00000e0: 6e8d c8eb 3c4f c22b b8d3 ed74 75b9 9550 n...<O.+...tu..P 00000f0: 632a d60e a232 ccc1 0000 0008 0000 0fa0 c*...2..........</pre> Even though ECB is a speed demon in terms of encryption, you should strongly avoid using it. https://secure.wikimedia.org/wikipedia/en/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29 explains why, and gives a good demonstration. And because the first parts of the disk clearly show the algorithm, key size and hash used, it shouldn’t even be an option, IMO.

Check out the first part of an aes-ebc-null disk with a 128 byte key:

0000000: 4c55 4b53 babe 0001 6165 7300 0000 0000  LUKS....aes.....
0000010: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000020: 0000 0000 0000 0000 6563 622d 6e75 6c6c  ........ecb-null
0000030: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000040: 0000 0000 0000 0000 7368 6131 0000 0000  ........sha1....
0000050: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000060: 0000 0000 0000 0000 0000 0800 0000 0010  ................
0000070: 3ee5 e173 f1c9 1241 5eb8 da2e 4e96 5851  >..s...A^...N.XQ
0000080: d788 8016 447d 83ab 3d51 6fdb d077 c6fb  ....D}..=Qo..w..
0000090: 4059 74f3 07da f0b0 1743 1eb0 11d5 7ebb  @Yt......C....~.
00000a0: 5fba 2011 0000 631f 6331 6138 3262 6564  _. ...c.c1a82bed
00000b0: 2d33 3661 362d 3464 3337 2d61 3863 612d  -36a6-4d37-a8ca-
00000c0: 3032 3065 3233 3965 3062 6362 0000 0000  020e239e0bcb....
00000d0: 00ac 71f3 0001 8dbc 598d f82b 50a4 a973  ..q.....Y..+P..s
00000e0: 6e8d c8eb 3c4f c22b b8d3 ed74 75b9 9550  n...<O.+...tu..P
00000f0: 632a d60e a232 ccc1 0000 0008 0000 0fa0  c*...2..........
]]> Comment on diff: memory exhausted by diff: memory exhausted « Ubuntuhttp://blog.wpkg.org/2007/09/26/diff-memory-exhausted/comment-page-1/#comment-4517 diff: memory exhausted « Ubuntu Thu, 01 Sep 2011 06:57:28 +0000 http://blog.wpkg.org/2007/09/26/diff-memory-exhausted/#comment-4517 [...] post: http://blog.wpkg.org/2007/09/26/diff-memory-exhausted/ Share this:TwitterFacebookLike this:LikeBe the first to like this [...] [...] post: http://blog.wpkg.org/2007/09/26/diff-memory-exhausted/ Share this:TwitterFacebookLike this:LikeBe the first to like this [...]

]]> Comment on Accessing Windows console remotely from Linux by Is there an equivalent to “netsh dhcp” on Linux / BSD - Admins Goodieshttp://blog.wpkg.org/2008/06/15/accessing-windows-console-remotely-from-linux/comment-page-1/#comment-4459 Is there an equivalent to “netsh dhcp” on Linux / BSD - Admins Goodies Sun, 21 Aug 2011 23:32:45 +0000 http://blog.wpkg.org/?p=21#comment-4459 [...] not try Winexe? It grants you Windows console access from Unix-like [...] [...] not try Winexe? It grants you Windows console access from Unix-like [...]

]]> Comment on Cipher benchmark for dm-crypt / LUKS by anonymoushttp://blog.wpkg.org/2009/04/23/cipher-benchmark-for-dm-crypt-luks/comment-page-1/#comment-4424 anonymous Mon, 08 Aug 2011 11:33:44 +0000 http://blog.wpkg.org/?p=70#comment-4424 Shecky, you're a legend. Cheers for the .csv!It's certainly confusing how 512-bit xts is better compared to 256-bit cbc, especially when the double key length requirement seems to be a mistake by the spec writers :/ Shecky, you’re a legend. Cheers for the .csv!

It’s certainly confusing how 512-bit xts is better compared to 256-bit cbc, especially when the double key length requirement seems to be a mistake by the spec writers :/

]]> Comment on Poor write performance on Fusion MPT SAS RAID controllers by adminhttp://blog.wpkg.org/2010/06/25/poor-write-performance-on-fusion-mpt-sas-raid-controllers/comment-page-1/#comment-4290 admin Mon, 11 Jul 2011 06:13:22 +0000 http://blog.wpkg.org/?p=160#comment-4290 If the FS supports barriers, you should be fine. If the FS supports barriers, you should be fine.

]]> Comment on Stale NFS file handle by Geoffrey McRaehttp://blog.wpkg.org/2007/10/26/stale-nfs-file-handle/comment-page-1/#comment-4288 Geoffrey McRae Mon, 11 Jul 2011 02:14:29 +0000 http://blog.wpkg.org/2007/10/26/stale-nfs-file-handle/#comment-4288 Wow, THANK YOU! This has solved a problem I have been having for a long time. I found that even clean mounts of a NFS share after the NFS server had rebooted wouldn't work for about 30 minutes with this error. I already had fsid=0 on the root point, but entirely missed that LVM info! Wow, THANK YOU! This has solved a problem I have been having for a long time. I found that even clean mounts of a NFS share after the NFS server had rebooted wouldn’t work for about 30 minutes with this error. I already had fsid=0 on the root point, but entirely missed that LVM info!

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