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Theo Band [GreenPeak] (theo...@greenpeak.com)

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Display Name:Theo Band [GreenPeak]
Partial Email Address:theo...@greenpeak.com
Posts:
1 total
1 in CentOS

3 Most Recent

1) Theo Band [GreenPeak] [CentOS] Thunderbird does not follow url links in Firefox
| +1 vote
Since the recent update from firefox2 to firefox3 the links in my mails do no longer work. No...
CentOS
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Since the recent update from firefox2 to firefox3 the links in my mails
do no longer work. No window pops up. After some debug I found the
problem. Let's share it with others that experience the same problem:

I'm using Thunderbird 2.0.0.17 (manually downloaded, that might have
caused the problem, I have not tried with 1.5)
I'm using Firefox 3.0.2 (yum installed CentOS 4.7)

To solve I created a small wrapper script that unsets LD_LIBRARY_PATH:

cat <path>/firefox_wrap
#!/bin/bash
unset LD_LIBRARY_PATH
firefox $@


To start add :
user_pref("network.protocol-handler.app.http", "<path>/firefox_wrap");
to
~/.thunderbird/<salt>/prefs.js
(or use the advanced config editor)


The error message (for those Googling around):
/usr/lib/firefox-3.0.2/firefox-bin:
/opt/thunderbird-2.0.0.17/libnss3.so: version `NSS_3.12' not found
(requiredby /usr/lib/firefox-3.0.2/libxul.so)

Cheers,
Theo

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2) Theo Band [GreenPeak] Re: [CentOS] Securing SSH
| +1 vote
You could consider to disallow password access. Use only public key authentication. The "attacks"...
CentOS
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Tim Alberts wrote:
> So I setup ssh on a server so I could do some work from home and I
> think the second I opened it every sorry monkey from around the world
> has been trying every account name imaginable to get into the system.
>
> What's a good way to deal with this?
>
> _______________________________________________
> CentOS mailing list
> [email protected: C...@centos.org]
> http://lists.centos.org/mailman/listinfo/centos
>

You could consider to disallow password access.
Use only public key authentication. The "attacks" will remain, but can
never succeed. (The scripts are not smart so they keep trying for hours
sometimes)

sshd_config:
PasswordAuthentication no

Now create a public/private ssh keypair and put the public key in
~/.ssh/authorized_keys on the remote machine.

# local machine*
ssh-keygen -t dsa*

*scp** ~/.ssh/id_dsa.pub  remote_host:.ssh/authorized_keys

*# remote host*
**chmod 600 ~/.ssh/authorized_keys
chmod 700 ~/.ssh
*

To be really save, only allow access from a limited number of IP addresses:

**

cat ~/.ssh/authorized_keys
from="123.345.133.123,home.com,work.com" ssh-dss
AAAAB3NzaC1kc3MA<snip>AqNY= [email protected: m...@email]

Theo
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3) Theo Band [GreenPeak] Re: [CentOS] Dump on remote filesystems?
| +1 vote
What you could do is to dump from the remote machine to the main backup machine. For this to work I...
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Scott Ehrlich wrote:
> I have a couple C5 systems I want to back up. My plan is to, one way
> or another, back them up to a C5 machine in my office. I have samba
> installed on the systems to back up, the machines are mounted on the
> system in my office, and a tape library hanging of the system in my
> office.
>
> I was hoping to perform a simple /sbin/dump of the remote systems. I
> put together a script for another successful backup I have going on a
> system with local filesystems. But for remote filesystems, I get
> errors of File Cannot Be Accessed (//remote_system/subdir) which does
> exist as an smb mounted filesystem.
>
> I'd use NFS, but I would like a bit more control and some level of
> encryption for the user authentication and data being transferred.
>
> If a direct dump of remote smb filesystems isn't possible, I may opt
> to have each system perform their own local dumps, then run a script
> locally on the tape-connected machine to dump those local dumps, or
> copy the dumps locally then dump them to tape.
>
> If nothing else works, I can always install Windows XP and use Windows
> backup program, but I'd really like to try and get this going under
> Linux before going that route.
>
> Thanks for insights.
>
> Scott

What you could do is to dump from the remote machine to the main backup
machine. For this to work I work with ssh keys (no password needed).
The example assumes the backup is started from the remote host. But in
principle it can also be initiated from the backup server using ssh.

SRC_SERVER=this_hostname
BAK_SERVER=backup_server
DATE=$(date +%Y%m%d)
dumplevel=0
export RSH=ssh

ssh $BAK_SERVER mkdir -p /backup/${SRC_SERVER}/${DATE}_${dumplevel}
# file needs to exist
backup_file=/backup/somefile
ssh $BAK_SERVER touch ${backup_file}
dump -${dumplevel} -u -z -f $BAK_SERVER:${backup_file}
/dev/VolGroup00/VolGroup00



Theo
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