memcache on multiple servers

Dirk-Willem van Gulik dirkx at
Wed May 7 14:15:25 UTC 2008

On May 7, 2008, at 3:48 PM, Yael Goldberg wrote:
> Is it OK for the daemon to listen on all IPs, instead of specifying  
> one IP
> address?  Is there any issues with that? Performance? Security?

It is generally a good habit to not expose ports or services to the  
outside world unless the outside world needs access. Memcache has  
virtually no security - so one generally binds it very specifically to  
an 'inside' interface which is not visible from the 'outside' - and it  
is common to use non-routable IP space (fc 1918) for these inside  
interfaces. See any of the diagam's about facebook, 37signals,  
twitter, flickr, or



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