guard livereload using ipv4 only . how to force to use ipv6.

[devprashant]

on server allowed to use only ipv6 for connection inbound and outbound.

netstat --listen output:

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 *:ssh                   *:*                     LISTEN     
tcp        0      0 *:35729                 *:*                     LISTEN     
tcp6       0      0 [::]:ssh                [::]:*                  LISTEN     
tcp6       0      0 [::]:3000               [::]:*                  LISTEN     
Active UNIX domain sockets (only servers)
Proto RefCnt Flags       Type       State         I-Node   Path
unix  2      [ ACC ]     STREAM     LISTENING     1185713259 @/com/ubuntu/upstart
unix  2      [ ACC ]     SEQPACKET  LISTENING     1185708161 /run/udev/control

here is the guardfile:

guard 'livereload', host:'0.0.0.0' do
 watch %r{^.*\.(html|css|js|png|jpg|jade)$}
end

here i do need to mention host specifically.

from netstat its visible guard binds livereload to ipv4 and not ipv6.

how to bind it to ipv6

[ybart]

Provided you have these two lines in your /etc/hosts

127.0.0.1       localhost
::1                 localhost

Binding to localhost in the Guardfile like this bound to ipv6 in my case (macOS):

guard 'livereload', host: 'localhost' do
  ...

Then I get this in is lsof:

lsof -i:35729       
COMMAND           PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
com.apple.WebKi   588 ybart   93u  IPv6 0x4571d672b83d719f      0t0  TCP localhost:59214->localhost:35729 (ESTABLISHED)
com.apple.WebKi   588 ybart   98u  IPv6 0x4571d672b83d719f      0t0  TCP localhost:59214->localhost:35729 (ESTABLISHED)
ruby            49803 ybart   15u  IPv6 0x4571d672bbb7ad1f      0t0  TCP localhost:35729 (LISTEN)
ruby            49803 ybart   19u  IPv6 0x4571d672b83d941f      0t0  TCP localhost:35729->localhost:59214 (ESTABLISHED)