ramblings of a sysadmin. | stuff i learned on the job.
Ramblings Of A Sysadmin. i run nmap on localhost on a nightly basis and compare the results (which are emailed to me) against the previous night’s. this...
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ramblings of a sysadmin. | stuff i learned on the job. | Page 2
this is a quick tutorial on tables port redirection. we have a few clients whose outgoing port 25 is blocked by their ISP due to vulnerabilities and exploits that cause this port to send out consider...
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ramblings of a sysadmin. | stuff i learned on the job.
i run nmap on localhost on a nightly basis and compare the results (which are emailed to me) against the previous night’s. this way, i can tell if something happened at a certain time if a new port m...
Ramblingsofasysadmin.com news digest
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17 years
enabling mod_rewrite on apache.
on a basic default apache installation, mod_rewrite doesn’t work by default.
i’ve determined that in all the cases i’ve experienced, it’s because AllowOverride All is not specified (by default, it’s AllowOverride None).
here are other troubleshooting steps to consider (credit to jdMorgan from webmasterworld.com):... -
18 years
paranoid iptables: block that IP range for good.
as long as your iptables is saved regularly, this command is pretty useful for those IPs that just seem to linger and never go away. i have this problem with IPs in korea.
as such, i’ve implemented the following “paranoid” iptables rule which i consider pretty helpful to keep them out for good:... -
18 years
i run nmap on localhost on a nightly basis and compare the results (which are emailed to me) against the previous night’s. this way, i can tell if something happened at a certain time if a new port mysteriously opens itself.
today, i encountered an open port on 6010. i investigated who was using them by running the following useful commands, which i am posting here for reference:... -
18 years
qmail error resolution: sorry, although i’m listed as a best-preference mx for t...
today, i had to reenable a domain through plesk. once the guy’s site was up and running, he said that he couldn’t receive email. i sent him a test email and had the following message:
Sorry. Although I’m listed as a best-preference MX or A for that host, it isn’t in my control/locals file, so I don’t treat it as local. (#5.4.6)...
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