[OpenAFS] OpenAFS, NAT, IPtables
Sat, 29 Sep 2007 10:18:50 -0400
Hi Jeffrey, thanks.
It's a linux cluster, so all the nat-ed clients are Linux machines.
(The head of the cluster is the one that does the nat-ing)
So I guess I am fine with those values.
Jeffrey Altman wrote:
> Ron Croonenberg wrote:
>> I found, after digging around for a good while, that changing these keys:
>> seems to work on FC6 (188.8.131.52-45.fc6).
>> But: Do I both need them ? and what is the best "minimal" value for
>> those keys ?
> you need both of them. they specify different things.
> The first is how long the firewall will permit inbound packets to be
> delivered after the last outbound packet between a given set of endpoints.
> The second is how long an idle port mapping will be maintained before it
> can be reused by a new client. Those values are fine. However, OpenAFS
> windows clients older than 1.5.17 probed up servers once every ten
> minutes and therefore a net.ipv4.netfilter.ip_conntrack_udp_timeout
> value of 780 will make your file servers much happier.
> You cannot set these values by port as you cannot guarantee what port
> numbers will be used by the client. The client will default to 7001 but
> for example, a client run in a VM behind a NAT will appear on a
> different port.
> Jeffrey Altman
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