[CentOS] CentOS automatically blocks port 80 out-of-the-box
Michael A. Peters
mpeters at mac.com
Wed Apr 8 00:49:45 UTC 2009
David M Lemcoe Jr. wrote:
> Maybe I just haven't installed enough distros, but the times I've installed CentOS, I've had to remember that by default, iptables is blocking inbound port 80 requests. This leads me to believe that I have a non-OS firewall error because I can ping but not http request.
> Is there a particular reason for this? Or is it a fail on my end?
Very few ports are open out of the box.
I'm not sure, but I think if you choose the webserver (or is it server
??) option at install it might have port 80 open.
Port 22 is open for ssh. I think 631 (cups) is as well, but not positive.
You can configure the firewall with system-config-securitylevel-tui
after install (it runs during firstboot as well) where you can easily
tell it to turn on port 80 (and/or 443) for web services.
pinging a box has nothing to do with ports are blocked, open, or closed.
You can filter pings but I don't believe the firewall does by default.
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