[mythtv-users] Fedora firewall problems(?)

R. G. Newbury newbury at mandamus.org
Thu Jul 3 17:16:02 UTC 2008


jonny Linux wrote:
> Hi,
> 
> I've got a new installation of Fedora 9. The problem is I can't connect to
> it for most services. For some reason ssh works, but I'm trying to use it as
> a mythtv backend, and it won't allow either a mysql connection or a
> mythbackend connection. Also the apache web server appears to be blocked (no
> route to host when doing "telnet 192.168.1.39 80").
> 
> I've used system-config-firewall to ensure there is no firewall running, and
> I've tried SELinux in both permissive and off modes.
> 
> Can anybody tell me of any other settings that could be blocking these
> ports?
> 

Sometimes figuring out what's going on with this sort of error requires 
the deductive genius of Sherlock Holmes *and* Hercule Poirot, working in 
concert!

0 The most likely and usual problem: check your cables!

1 Can you get *out* to the world from the new box? (Eg. the new box is 
working...)

2 Ifconfig on the new box actually reports '192.168.1.39'

3 You are plugged into the correct NIC ( eg this is not a 2 NIC 
setupt...where the box could pass test #1 but still 'refuse' you access!)

4 The router is set up to allow access to the new installation. This can 
be a silent killer. Check the router
a) for MAC address restrictions (not likely on a new installtion to an 
old box, but possible for a new box),
b) for IP address restrictions ( nothing above 192.168.1.32 for 
example..sometimes tied with the DHCP range even though using a static 
address) and
c) IP address assignments ( that IP address is reserved for another box, 
by *that box's* MAC address: both MAC addresses show up as 
allowed-access, but one is already tied to ..1.39.)

5 Can you ping from another box by IP as root and as a user?

6 Can you ping by hostname: check /etc/hosts-allow and hosts-deny on 
both boxes

7 Check that both boxes are using the correct (same) hostname and IP 
address in /etc/hosts.

8 I'm out of ideas....

Geoff



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