Getting started with JunOS?

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Apparently I need learn a 4th firewall vendor – Junipers SRX JunOS

If you’re new to the world of Juniper (like me) then I can’t recommend the Day One guides enough, I’m finding them to be an excellent balance of information and example.

Maybe I will look at their accreditation after all :)

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Undelete

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I’ve just used this little gem to recover files off a memory card… awesome!

PhotoRec is file data recovery software designed to recover lost files including video, documents and archives from hard disks, CD-ROMs, and lost pictures (thus the Photo Recovery name) from digital camera memory. PhotoRec ignores the file system and goes after the underlying data, so it will still work even if your media’s file system has been severely damaged or reformatted.
PhotoRec is free – this open source multi-platform application is distributed under GNU General Public License.

Link: http://www.cgsecurity.org/wiki/PhotoRec

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Bookmarks for Automation

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I’ve found a couple of good links recently for automating tasks….

  • isup.me: Great little site for checking if a web server is up or not… you can even create bookmarks like www.isup.me/http://news.bbc.co.uk which will take you straight to the result.
  • icanhazip.com: This site simply responds with a plain text answer of your IP address, nice for checking if NAT and proxies are working like they should.
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Bookmarks: Clustered Filesystems for CentOS

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Excellent resources….

Clustered Filesystem with DRBD and GFS2 on CentOS 5.4

…a short walk-through of how to set up a filesystem, which replicates across two web nodes, and allows concurrent access from both nodes. This scenario is particularly useful, when you intend to load-balance or automatically fail-over two web nodes…

Clustered Filesystem with DRBD and OCFS2 on CentOS 5.5

…OCFS2 works very similar to GFS2, except that it doesn’t use RedHat’s Cluster Manager, but instead ships with O2CB, Oracle’s own cluster manager. As far as the filesystem is concerned, it does the same thing.

I’ve been playing with both solutions in VirtualBox with a plan to roll out to ec2 and solve my cpu issues.

GFS won’t be happening in EC2 as that requires multicast, I’ve played with IPSEC and GRE and the redhat clustering stuff just won’t bind to the tunnel interfaces.

OCFS2 looks like it will work, I’ll be testing on a micro-instance later but doesn’t support SELINUX so I’ll need to review my security config.

More posts no doubt as testing continues!

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links for 2009-11-29

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