startup error -> "[emerg] duplicate listen options" if 2nd IPv6 listener is enabled

pgn nginx-forum at
Tue Jul 3 19:04:26 UTC 2012


Reading the docs, it's not clear to me -- or others apparently:

-- that ipv6only=on can only be specified once ...

While some 'additional parameters' on the listen line are restricted in
this manner, others -- e.g., ssl, spdy -- are not, and can appear
multiple times.

Posted at Nginx Forum:,228250,228257#msg-228257

More information about the nginx mailing list