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[richard_ablitt]

Does anyone have any advice about starting a career in system administration? I've been using Linux for about 10 years at home and have used most of the main distributions. I've got a web server set up on a Scientific Linux virtual machine using the ISPConfig hosting control panel, and I passed the RHCSA exam in December.

I've been doing agency work until now, and have had a range of office, factory and laboratory jobs.
Thanks
Richard

[Mad Penguin]

Yup, learn IPV4 inside out, make sure you know all the standard office tools like postfix, samba, dhcpd, learn some bash, then have a play with either puppet or chef.

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[richard_ablitt]

Thanks, I hadn't come across Puppet or Chef before so I'll set up some more VMs and try them out. I've run a mail server in the past, but unfortunately my ISP seems to be blocking port 25 now. I tend to use NFS and autofs on my network, but I'm comfortable with Samba as well.

[Mad Penguin]

Personally I think Chef is pure evil, and I've not used Puppet, but they figure in 4 out of 5 job specs I see.

No ISP should block port 25 - I'd get a new ISP if I were you ...

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[richard_ablitt]

It'll be a few months before the contract ends but I'll probably get a different one after that

[Mark Greaves (PCNetSpec)]

Are you sure port 25 is being blocked ?

I just ran:

nmap -p 25 2.31.68.xxx

against your IP, and got:-

Starting Nmap 5.21 ( http://nmap.org (http://nmap.org) ) at 2013-02-09 15:03 GMT
Nmap scan report for 2.31.68.xxx
Host is up (0.066s latency).
PORT   STATE    SERVICE
25/tcp filtered smtp

[richard_ablitt]

Nmap sees it as open, but it times out on http://canyouseeme.org/ (http://canyouseeme.org/) . /var/log/maillog is also filled with timeout messages. Dovecot and Postfix are running, and I can log in and get a folder listing from other computers.

[Mark Greaves (PCNetSpec)]

Hmm .. a quick "Google" suggests you're right .. Orange are indeed well known for blocking port 25 

[Mad Penguin]

Mmm, not sure I'd call orange an ISP ..

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