How can I look up IP addresses under UNIX or Linux operating systems using command line options?
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ip addresses
Q. I’m running Apache 2 server under FreeBSD jail. However, I see lots of warning / error messages in /var/log/httpd-error.log as follows:
[Sat Sep 20 20:47:09 2008] [warn] (61)Connection refused: connect to listener on 0.0.0.0:80
[Sat Sep 20 20:47:10 2008] [warn] (61)Connection refused: connect to listener on 0.0.0.0:80
[Sat Sep 20 20:47:11 2008] [warn] (61)Connection refused: connect to listener on 0.0.0.0:80
How do stop all these warning messages flooding my Apache log files?
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Can you explain DNS name resolution concept? Why I need to set DNS resolution for my Windows or Linux server? How do I setup DNS name resolution under Linux / UNIX server system?
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Q. I’m experiencing decreased network performance due to ARP broadcasts coming from one system. What would cause a lot of ARP broadcasts from one server / computer?
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Q. How do I configure my Postfix mail server to scan incoming mail for spam using DNS Blackhole List such as: a) The Spamhaus b) Open Relay Database etc A. To discard spam or garbage email you can use 3rd party services such as Spamhaus. These are realtime database of IP addresses of verified spam [...]
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