I followed the "Perfect Server" installation for Ubuntu 11.04 and ISPConfig 3.
When using shell as generic linux user or sudo, name resolution works perfectly.
Inside a chrooted environment, name resolution fails.
Here's what I did:
I created a client, and a site. (No reseller is used in my case).
I gave the client a chrooted shell.
The client user can login to the shell, but cannot get name resolution from the shell using any of the available tools:
ping: unknown host www.google.com
ping with ip address works fine, of course.
chrooted /etc/resolv.conf contains:
search (my local domain here)
The chrooted user can read from resolv.conf
It is identical to the root version.
/bin/ping does have required suid:
ls -la /bin/ping
-rwsr-xr-x 1 0 0 35680 Nov 15 2010 /bin/ping
As far as the settings in ISPConfig's panel for jailkit, these are still set to default values:
Jailkit chroot app sections:
basicshell editors extendedshell netutils ssh sftp scp groups jk_lsh
Jailkit chrooted applications:
/usr/bin/groups /usr/bin/id /usr/bin/dircolors /usr/bin/lesspipe /usr/bin/basename /usr/bin/dirname /usr/bin/nano /usr/bin/pico
I copied dig and nslookup into the chrooted environment, and both work.
This server functions as Web and Mail server only. All other services (including DNS server) are disabled. Mail seems to be working perfectly. I haven't tested the web server yet.
Has anyone else run into this issue?
Any ideas on what might be causing the problem?