[Pharo-dev] Zinc IPv6 (was Re: strange difference between localhost and 127.0.0.1 with a Zinc server on mac)

[Ben Coman]

Luc Fabresse wrote: 2014-06-14 6:04 GMT+02:00 Ben Coman <b...@openinworld.com>: Luc Fabresse wrote: Hi, I experiencing a strange difference between localhost and 127.0.0.1. In Pharo I do: (ZnServer startDefaultOn: 4444)     onRequestRespond: [ :request | ZnResponse ok: (ZnEntity text: 'hello') ] In bash: $ lsof -Pi | grep Pharo Pharo     2718  luc    7u  IPv4 0x1e64a2e9381f409b      0t0  TCP *:4444 (LISTEN) I perfectly listen on port 4444 from all interfaces * $ curl http://127.0.0.1:4444 hello $ curl http://localhost:4444 curl: (7) Failed to connect to localhost port 4444: Connection refused                     <- why ? localhost is correctly resolved on my mac $ ping localhost PING localhost (127.0.0.1): 56 data bytes 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.044 ms I tested with other programs than Zinc to open listening sockets and it works. Any idea? #Luc maybe http://sourceforge.net/p/curl/bugs/1337/ Humm, I use curl 7.36.0, so yes perhaps this bug fix is not integrated... Anyway, I was also suspecting curl but I tested with server: Apache on port 8888 and here curl works: httpd     621  luc    5u  IPv6 0x6ea19c1d988f10db      0t0  TCP *:8888  <-- same as Zinc Yes. If the *:8888 means that Apache was listening on "all" IP addresses rather than just 127.0.0.1, then as you can see it was an IPv6 address that curl connected to.  btw, What do you get from `nslookup localhost` ? Anyway, the question then becomes... How well does Pharo / Zinc play with IPv6 ?  cheers -ben but both: curl http://127.0.0.1:8888 curl http://localhost:8888 are working. wget always works (Apache and Zinc): wget -qO- http://127.0.0.1:8888 wget -qO- http://localhost:8888 Thanks Max and Ben, Luc