Setting up nbd server, https server, samba server and tftp server on ubuntu 18.04

file_servers.md

Install required packages

apt install -y nbd-server nbd-client apache2 wget samba smbclient cifs-utils tftpd-hpa tftp

Set a variable for local IP (not mandatory)

export LOCAL_IP="192.168.21.2"

HTTPS server

1. Enable SSL module and restart the server
   • a2enmod ssl
   • a2ensite default-ssl
   • systemctl restart apache2
2. Create a file to share. I am just creating a disk file to reuse it in NBD server. You can create any type of file.
   • dd if=/dev/zero of=/var/www/html/disk0 bs=1M count=100
   • chmod a+w /var/www/html/disk0
   • mke2fs /var/www/html/disk0
3. Access the file via HTTPS server
   • wget --no-check-certificate https://${LOCAL_IP}/disk0

NBD server

1. Start hosting the disk image created above.
   • nbd-server ${LOCAL_IP}:10809 /var/www/html/disk0
2. Access the disk image via NBD server
   • nbd-client ${LOCAL_IP} 10809 /dev/nbd0
3. Mount, use & unmount NBD disk
   • mount /dev/nbd0 /mnt
   • ls /mnt
   • umount /mnt
4. Disconnect the client after we are done with the disk
   • nbd-client -d /dev/nbd0

Samba/CIFS server

1. Add a share named "users" to server configuration

   cat <<"EOF" >> /etc/samba/smb.conf
   [users]
       path = /var/www/html
       browseable = yes
       read only = no
       force create mode = 0660
       force directory mode = 2770
       guest ok = no
       #valid users = nbd @nbd @sambashare
   EOF
   

2. Add & enable a user
   • smbpasswd -a nbd
   • smbpasswd -e nbd
3. Restart services
   • systemctl restart smbd
   • systemctl restart nmbd
4. Verify the server
   • smbclient //${LOCAL_IP}/users -U nbd
5. Mount samba share locally
   • mount -t cifs -o username=nbd -o nolock,sec=ntlmsspi,seal,vers=3.0,rw //${LOCAL_IP}/users /mnt
6. Use and unmount
   • ls /mnt
   • umount /mnt

TFTP server

1. Update server configuration

   cat <<"EOF" > /etc/default/tftpd-hpa
   TFTP_USERNAME="nbd"
   TFTP_DIRECTORY="/var/www/html"
   TFTP_ADDRESS=":69"
   TFTP_OPTIONS="--secure"
   EOF
   

2. Restart service
   • systemctl restart tftpd-hpa
3. Get a file from the server
   • tftp ${LOCAL_IP}

   • tftp> get disk0

   • tftp> quit

4. Get a file from the server using busybox
   • busybox tftp -g -r disk0 ${LOCAL_IP}