Adam's questions

I have a list of IP addresses on a network, and most of them support multicast DNS. I'd like to be able to resolve the server name instead of just having the IP address.

ping computer.local
64 bytes from 192.168.0.52: icmp_seq=1 ttl=64 time=5.510 ms
64 bytes from 192.168.0.52: icmp_seq=2 ttl=64 time=5.396 ms
64 bytes from 192.168.0.52: icmp_seq=3 ttl=64 time=5.273 ms

Works, but I'd like to be able to determine that name from the IP. Also the devices don't necessarily broadcast any services, but definitely do support mDNS broadcast. So looking through services won't work.

How do you replace the Passenger Application failed to load error messages. They are lovely, but I'd rather not display them when we move our application to production. It'd be better to just show them on the dev box and maintenance page on the live site.

For clarification, this is the call stack page passenger displays when your rails app fails to load.

I'd rather not modify the passenger template files directly.

Passenger doesn't seem to be respecting:

ErrorDocument 500 /500.html