[f-nsp] dns keepalive checks on "unknown" ports

Michael Renner michael.renner at geizhals.at
Thu Nov 11 22:04:46 EST 2004


David J. Hughes wrote:
> 
> On 12/11/2004, at 11:01 AM, David J. Hughes wrote:
> 
>> Wow!  I've seen some "odd" things on the SI's but that one just about 
>> takes the cake.  Logic, useability, and firmware development 
>> strategies are obviously mutually exclusive :)
> 
> 
> It's not every day I reply to my own posts ;-)
> 
> But, on this "well known tcp port" business, I just remembered that when 
> we did our initial testing of using master-port configuration we did it 
> using dummy SMTP servers running on port 26 - and it worked just fine.  
> Now, TCP 26 doesn't appear to be too well known to me.  That was on a 
> pair of SI-100's running WSR08100m.  Might be worth actually trying it 
> before discarding the idea.

I think the "well-known" stuff is bullshit, they just didn't implement 
it for UDP for reasons unbeknownst (doesn't appear in the tab completion 
list of "udp keepalive", typing it in manually results in "Invalid input").

best regards,
michael



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