iptab
هم پاي سيستم بوديد با iptab همين خروجي رو مي توانيد
داشته باشيد. اما احتمالا پس از مدت خيلي كمي حفظ مي شويد.
+----------------------------------------------+ | addrs bits pref class mask | +----------------------------------------------+ | 0 /32 255.255.255.255 | | 2 1 /31 255.255.255.254 | | 4 2 /30 255.255.255.252 | | 8 3 /29 255.255.255.248 | | 16 4 /28 255.255.255.240 | | 32 5 /27 255.255.255.224 | | 64 6 /26 255.255.255.192 | | 128 7 /25 255.255.255.128 | | 256 8 /24 1C 255.255.255.0 | | 512 9 /23 2C 255.255.254.0 | | 1K 10 /22 4C 255.255.252.0 | | 2K 11 /21 8C 255.255.248.0 | | 4K 12 /20 16C 255.255.240.0 | | 8K 13 /19 32C 255.255.224.0 | | 16K 14 /18 64C 255.255.192.0 | | 32K 15 /17 128C 255.255.128.0 | | 64K 16 /16 1B 255.255.0.0 | | 128K 17 /15 2B 255.254.0.0 | | 256K 18 /14 4B 255.252.0.0 | | 512K 19 /13 8B 255.248.0.0 | | 1M 20 /12 16B 255.240.0.0 | | 2M 21 /11 32B 255.224.0.0 | | 4M 22 /10 64B 255.192.0.0 | | 8M 23 /9 128B 255.128.0.0 | | 16M 24 /8 1A 255.0.0.0 | | 32M 25 /7 2A 254.0.0.0 | | 64M 26 /6 4A 252.0.0.0 | | 128M 27 /5 8A 248.0.0.0 | | 256M 28 /4 16A 240.0.0.0 | | 512M 29 /3 32A 224.0.0.0 | | 1024M 30 /2 64A 192.0.0.0 | | 2048M 31 /1 128A 128.0.0.0 | | 4096M 32 /0 256A 0.0.0.0 | +----------------------------------------------+
Alan Cox و آینده امنیت کامپیوتری
Alan Cox را حتما مي شناسيد.
مقدار زيادي از وصله هاي كرنل لينوكس دست پخت ايشون هست. ( از آلن كه نوشته بشه
بايد اسم تسلا رو هم آورد ديگه !!!) ايشون مصاحبه اي كوتاه با O’Reilly Network
انجام داده اند در مورد آينده امنيت در حوزه كامپيوتر-سيستم ها-برنامه نويسي. با
اينكه كوتاه هستش اما جمع بندي خوبي انجام شده. قسمتي كه به نظرم قابل توجه رسيد :
The
Next 50 Years of Computer Security: An Interview with Alan Cox
It’s important perhaps to point out here that secure programs, reliable programs and correct programs are all different things. Knowing how to write provably secure programs is very different from saying we know how to write reliable or correct programs.
Red Hat Directory Server
Review: Red Hat Directory Server
Red Hat’s recently released Directory Server product,
however, does offer easy setup, full implementation of LDAPv3 and
multi-master replication — as well as a few other features. Red Hat
Directory Server (RHDS) is formerly known as the Netscape Directory Server,
which Red Hat acquired last October. Red Hat is now selling it under its
subscription model, for Red Hat Enterprise Linux (RHEL), Solaris, and HP-UX
11i. The company has also pushed the technology into the Fedora Project as
the Fedora Directory Server, but this article will only look at the RHDS
offering.