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Stuart Rauh wrote:

> Using RedHat 6.2, with IP Masquerading set up and working on a cable
> modem...
> 
> I've been trying to get xntpd working for time synchronization on the
> server.  It doesn't seem to be getting through.  But an NTP client on an
> internal Windows 98 machine works fine.
> 
> I've been killing myself looking over the config for xntpd.  I've started
> wondering if the trouble could be in my IP chains setup.  Is it possible
> that an internal machine could connect to a time server but the masquerading
> server couldn't?

easily.

xntpd on the masquerading server will use connection tuples that look like:

    localaddr:123 <--> remoteaddr:123

whereas an ntp client on a masqueraded host will use tuples that look like:

    localaddr:61000-65096 <--> remoteaddr:123

your ipchains rules probably accept the latter but not the former.

raf

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