Balazs Scheidler wrote : (snip)

those files are loaded dynamically by the libc

ok I now understand better

do you have resolv.conf/host.conf ?

You're right ! 8561 open("/etc/resolv.conf", O_RDONLY) = 5 8561 open("/etc/host.conf", O_RDONLY) = -1 ENOENT (No such file or directory) question : what's the difference, in name resolution process, between /etc/hosts.conf and /etc/nsswitch.conf my updated config : $JAIL/etc/resolv.conf is ok and working (tested outside the jail) $JAIL/etc/nsswitch.conf contain "hosts: dns" $JAIL/etc/hosts.conf contain "order bind" syslog-ng continue to resolve hostnames only if they are in $JAIL/etc/hosts