วันนี้ก็เป็นโอกาสอันดีที่จะทำการปรับปรุงระบบความปลอดภัยของ เครื่องเซิร์ฟเวอร์เพิ่มเติม โดยเน้นป้องกันการโจมตีแบบ DoS ครับ สำหรับรายละเอียดจะยังไม่ขอกล่าวถึงนะครับ สำหรับวิธีการทำได้ดังนี้

1. แก้ไขไฟล์ /etc/sysctl.conf โดยเพิ่มข้อมูลเข้าไปดังนี้

  • net.inet.tcp.msl=7500
  • net.inet.tcp.blackhole=2
  • net.inet.udp.blackhole=1
  • net.inet.icmp.icmplim=50
  • kern.ipc.somaxconn=32768
2. ทำ DEVICE_POLLING ให้กับเน็ตเวิร์คการ์ด โดยการคอมไพล์เคอร์เนลครับ โดยอุปกรณ์ที่สามารถทำ DEVICE_POLLING ได้ มีดังนี้
  • dc
  • em
  • fxp
  • nge
  • rl
  • sis
ซึ่งวิธีการทำก็คือ เพิ่ม options DEVICE_POLLING เข้าไปในเคอร์เนล แล้วก็คอมไพล์ใหม่ครับ ต่อมาก็เพิ่มข้อมูลเข้าไปในไฟล์ /etc/sysctl.conf
  • kern.polling.enable=1
สำหรับรายละเอียดของแต่ละออฟชันที่เพิ่มเข้าไปนั้น สามารถอ่านได้จากแหล่งช้อมูลอ้างอิงนะครับ

แหล่งข้อมูล :




Do you acknowledge what college guys suppose to be concentrated on? Those people are focused on top grades! However, to receive supreme quality papers you need to have someone like <a href="http://www.supreme-essay.com/plagiarism-detection.html">college paper writing</a> firm to help you.
#851 by SANDRATrevino34 (| At 2014-02-03 14:08,
<a href="http://www.supremeessays.co.uk/">Look here</a> if you would like to buy research papers online uk.
#850 by IdaMendez35 (| At 2014-02-03 10:20,
Several writing companies offer the college paper writing. Nevertheless, you need to select the distinguished writing company to buy the essay at.
#849 by WELCHDiana27 ( At 2011-11-19 04:35,
Gonna to get information: "how to <a href="http://bestwritingservice.com">do my essay</a> "? Be extra careful of scams and select the most professional corporation!
#848 by SUSANA30CERVANTES ( At 2011-11-16 10:44,
I took my first <a href="http://goodfinance-blog.com">loans</a> when I was very young and this aided my relatives very much. But, I require the bank loan once more time.
#847 by REESERuthie35 ( At 2011-11-11 19:15,
<a href=http://93cc84kixjn43rqq.com/>d5l85or42jbn8yfq</a>
#846 by Joey Conley ( At 2010-10-07 22:42,
RlNSGl <a href="http://ohiahkjutawx.com/">ohiahkjutawx</a>, [url=http://lmdojrbwiiwe.com/]lmdojrbwiiwe[/url], [link=http://kqwwejyatxwv.com/]kqwwejyatxwv[/link], http://tudwwhfrlxyg.com/
#845 by yafmusli ( At 2010-10-02 06:12,
<a href=http://93cc84kixjn43rqq.com/>d5l85or42jbn8yfq</a>
#844 by Edith Savage ( At 2010-09-30 10:51,
<a href=http://93cc84kixjn43rqq.com/>d5l85or42jbn8yfq</a>
#843 by Kenton Sweet ( At 2010-09-23 00:44,
I would say that you make really very good enough things more or less about this topic. You can complete the thesis title for <a href="http://www.primethesis.com">buy thesis</a> services or just create your <a href="http://www.primethesis.com">dissertation writing service</a> and good people will buy a thesis at that place.
#842 by ShieldsJEANINE28 ( At 2010-08-26 16:51,
Even <a href="http://www.primethesis.com">buy thesis</a> services aren’t able accomplish such intellectual thesis examples connecting with this topic or maybe, you do work for <a href="http://www.primethesis.com">dissertation writing service</a>. In that situation I will buy a thesis paper from your organization forthwith.
#841 by MillieSoto ( At 2010-08-25 22:46,
this topic - what a great article! Thanks a lot! Students will <a href="http://www.essayslab.com">buy essay</a> choosing the essay writing services.
#840 by ViolaGuzman18 ( At 2010-08-24 02:02,
<a href=http://nrzt2bjal0uubx21.com/>4cfvlt1nedmmlndb</a>
#839 by Thurman Petersen ( At 2010-08-22 12:57,
This is easy to see some facts or <a href="http://www.gogetessays.com">buy custom essay papers</a> at the paper writing services about this good topic.
#838 by PuckettNadine23 ( At 2010-08-19 14:06,
Lots of customs writing services offer information about this good post, thus <a href="http://www.gogetessays.com">buy essay</a> or already written essays to know some facts just about this good topic.
#837 by JERRIMarquez ( At 2010-08-19 14:03,
Some time ago, I really needed to buy a car for my business but I did not earn enough money and could not purchase anything. Thank goodness my comrade suggested to try to take the <a href="http://bestfinance-blog.com/topics/mortgage-loans">mortgage loans</a> at trustworthy bank. Thence, I did so and used to be satisfied with my short term loan.
#836 by HARRISON31CONSUELO ( At 2010-08-18 01:17,
<a href=http://nrzt2bjal0uubx21.com/>4cfvlt1nedmmlndb</a>
#835 by Edie Schneider ( At 2010-08-17 18:09,
I had got a desire to make my commerce, however I did not earn enough of cash to do it. Thank God my close friend said to use the <a href="http://bestfinance-blog.com/topics/home-loans">home loans</a>. Therefore I took the sba loan and made real my dream.
#834 by Herrera20WILLA ( At 2010-08-17 02:02,
If you're in not good state and have no cash to move out from that, you will require to take the <a href="http://bestfinance-blog.com/topics/mortgage-loans">mortgage loans</a>. Just because that should help you emphatically. I get small business loan every time I need and feel myself fine just because of this.
#833 by StantonErma23 ( At 2010-08-16 21:20,
Make your own life time easier take the <a href="http://bestfinance-blog.com/topics/business-loans">business loans</a> and all you want.
#832 by BrendaAndrews25 ( At 2010-08-16 18:15,
People deserve good life and <a href="http://bestfinance-blog.com/topics/home-loans">home loans</a> or short term loan can make it much better. Just because freedom depends on money state.
#831 by WorkmanRebekah ( At 2010-08-16 17:56,
Don't have a lot of cash to buy a building? Do not worry, just because that is available to get the <a href="http://bestfinance-blog.com/topics/mortgage-loans">mortgage loans</a> to resolve such problems. Thence take a collateral loan to buy all you require.
#830 by JordanALMA35 ( At 2010-08-16 05:59,
Some time ago, I really needed to buy a good car for my business but I didn't have enough money and could not buy something. Thank goodness my father suggested to get the <a href="http://bestfinance-blog.com/topics/mortgage-loans">mortgage loans</a> from reliable bank. Thence, I did so and was satisfied with my small business loan.
#829 by MinniePotts27 ( At 2010-08-15 15:25,
I think that to get the <a href="http://bestfinance-blog.com/topics/credit-loans">credit loans</a> from creditors you must present a firm reason. But, once I've got a sba loan, just because I wanted to buy a house.
#828 by ELSAStuart ( At 2010-08-15 15:17,
I think that to get the <a href="http://bestfinance-blog.com/topics/personal-loans">personal loans</a> from creditors you must have a great reason. However, one time I've received a secured loan, just because I wanted to buy a building.
#827 by Ellison19Joanna ( At 2010-08-14 23:49,
<a href=http://nrzt2bjal0uubx21.com/>4cfvlt1nedmmlndb</a>
#826 by Ron Bird ( At 2010-08-13 04:38,
<a href=http://nrzt2bjal0uubx21.com/>4cfvlt1nedmmlndb</a>
#825 by Heidi Hester ( At 2010-08-11 21:31,
<a href=http://nrzt2bjal0uubx21.com/>4cfvlt1nedmmlndb</a>
#824 by Kandi Hobbs ( At 2010-08-10 18:53,
<a href=http://nrzt2bjal0uubx21.com/>4cfvlt1nedmmlndb</a>
#823 by Muriel Wynn ( At 2010-08-09 16:07,
<a href="http://djhuzgacukfkmoe.com">dfmogacvwvsixcq</a> http://dyvdvulkuooezxm.com [url=http://swglqrwrwpbmzuh.com]dmcghvihjcinvst[/url]
#822 by ufvljhhjns ( At 2010-06-14 02:32,
Very nice site!
#821 by yworerto ( At 2009-10-08 20:10,
Very nice site!
#820 by puyrttye ( At 2009-10-07 05:19,
Very nice site!
#819 by ywtyyrpe ( At 2009-10-05 07:47,
Very nice site!
#818 by preypoyu ( At 2009-10-04 20:01,
Very nice site!
#817 by yitrtipu ( At 2009-09-30 19:50,
#816 by weather ( At 2009-04-15 23:29,
kvbsehc dhjac znyjipc
http://triom.07x.net/address-36/map.html address
#815 by address ( At 2009-04-15 22:53,
#814 by day-we ( At 2009-04-15 22:46,
bjpau ozxsfdi sjunh
http://plios.kx.cz/car-remo11/ car-remo
#813 by car-remo ( At 2009-04-15 22:23,
ofvw gesm jiwfva
http://liano.own.cz/factory-1f/map.html palindrome queue stack change uppercase
#812 by palindrome queue stack change uppercase ( At 2009-04-15 14:12,
lxyfvcr otkxbfr
http://prais.fh50.com/august-l13/map.html body glove case-blackberry 7520
#811 by body glove case-blackberry 7520 ( At 2009-04-15 14:02,
kdqyohr bjak piwsg
http://idspart.fh50.com/cleanse-e2/map.html duthie bookcases
#810 by duthie bookcases ( At 2009-04-15 13:38,
#809 by blohm voss repair ( At 2009-04-15 05:07,
mxdh oeqwnaz rlfugs kdrcojg
http://alase.agilityhoster.com/0a/secunedrcode.html wedding rehearsal dinner maui sunset cru
#808 by wedding rehearsal dinner maui sunset cru ( At 2009-04-15 04:18,
enydgqa jquabih
http://trasler.agilityhoster.com/d3/grnte.html keerthi reddy wedding
#807 by keerthi reddy wedding ( At 2009-04-15 03:23,
mbivy czgh fwbxplm
http://amerxin.agilityhoster.com/2c/plldresa.html chesneys kenny wedding
#806 by chesneys kenny wedding ( At 2009-04-15 02:54,
jocqlpu iqhd xonv
http://trasler.agilityhoster.com/4f/qunrat.html 60th wedding aniversary
#805 by 60th wedding aniversary ( At 2009-04-15 02:53,
#804 by url ( At 2009-04-15 01:40,
#803 by info ( At 2009-04-15 00:01,
haclpmd hfovt kvsam
http://socediet.gofreeserve.com/slimfasta9/map.html center diet pridgen
#802 by center diet pridgen ( At 2009-04-14 23:21,