On 7/10/2014 7:52 PM, Stefan Maerz wrote:
Hi everyone,
I have a problem I have been unable to solve all day (literally *all*
day).
My pfSense box has two LAN interfaces and a WAN interface. A CentOS
7.0 server is giving me grief on one of the Subnets when configured as
static or dynamic.
When I put the problematic CentOS box on the other subnet (and change
corresponding host network configurations), it works. The CentOS box
also works when I put it on my trustworthy Linksys WRT router (again,
changing host network settings along the way). To me this smelled of a
firewall problem, but there is nothing logged and I have both LAN
interfaces set up to pass everything. Secondly I looked at DHCP for
possible DHCP addressing conflicts, but the DHCP server is disabled on
this subnet. TCPdump reveals that literally nothing is making it to
the gateway interface, however at the same time the activity light on
the interface blinks corresponding to my pings (there is no other
traffic).
Further confusing me is that I am able to get a static IP from other
devices when I plug them into the problematic subnet. Basically this
single device does not work on this single subnet and that is the only
problem. Other devices are fine on this subnet and this device is fine
on other subnets. ...?
It is also worth noting that all the link lights are lighting up and
the cables and switch have been tested to be working correctly.
Nothing that I can see looks out of place in pfSense's logs.
Here are my host configuration files, all generated by CentOS's nmtui
utility. I tried my own manual configurations with the same results
(not working):http://pastebin.com/HFYYTG09(possible typos -- this is
hand written, my apologies if that is the case)
I am at a loss and have been at this all day. pfSense has so little to
configure that I'm not really sure what I could have done wrong. I
feel like it is something really simple that I missed. Anyone have
recommendations on how to troubleshoot?
Best Regards,
-Stefan
Hello again,
I have been looking around. I found something interesting in my ARP
table. For some reason my Windows 7 Admin workstation has two IP
addresses assigned to it. Stranger yet is that one of the addresses a)
is not on the correct subnet, and b) is the gateway address for the SRV
subnet (the problematic subnet).
Additionally there is nothing in the problematic CentOS box's ARP table.
To me this would indicate that CentOS is trying to reach its gateway but
pfSense is telling it that its gateway is on the wrong subnet (my
Windows Admin Computer).
I unplugged everything from the SRV (problematic) subnet and unplugged
the ADMINISTRATOR computer then manually flushed pfSense's ARP table
(arp -da). This removes the 10.145.1.38 entry, but the incorrect
10.144.1.1 entry is persistent.
How can I fix this? Is something misconfigured? Am I misunderstanding
something? Is it a pfSense bug?
See pictures:
https://db.tt/4Q6skpiF -- pfSense ARP table (some data sanitized)
https://db.tt/coWT9GoB -- Settings on ADMINISTRATOR PC
I am greatly appreciative of any help.
Best Regards,
-Stefan
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