ServerOK – Page 2 – Linux Server Management

Enable Passive FTP in ISPConfig

To enable Passive FTP in Debian/Ubuntu installation of ISPConfig, run

echo "40110 40210" > /etc/pure-ftpd/conf/PassivePortRange

1	echo "40110 40210" > /etc/pure-ftpd/conf/PassivePortRange

Restart pure-ftpd

service pure-ftpd-mysql restart

1	service pure-ftpd-mysql restart

Now open ports 40110-40210 in firewall.

On CSF Firewall, edit

vi /etc/csf/csf.conf

1	vi /etc/csf/csf.conf

Add

40110:40210

1	40110:40210

At ened of TCP_IN line.

Example

TCP_IN = "20,21,22,25,53,80,110,143,443,465,587,993,995,3333,8080,8090,19999,40110:40210"

1	TCP_IN = "20,21,22,25,53,80,110,143,443,465,587,993,995,3333,8080,8090,19999,40110:40210"

See ispconfig

Set default editor in Ubuntu

To set default editor in Ubuntu/Debian, run

update-alternatives --config editor

1	update-alternatives --config editor

Ubuntu default editor

See update-alternatives

Reorder windows in tmux

To reorder windows in tmux, you can use following command

CTRL + B + .

1	CTRL + B + .

Press CTRL + B or whatever prefix you use, then press . (dot). This will ask you number/position where you need current window moved.

Another method is

CTRL + B + :

1	CTRL + B + :

This will give you tmux command promt. Now enter

move-window -t 0

1	move-window -t 0

This will move current window to position 0. This only work if position 0 is empty. If another window already present in position 0, use swap-window command.

swap-window -t 0

1	swap-window -t 0

This with swap current window with window in position 0.

Another useful command is

CTRL + B + ,

1	CTRL + B + ,

This will allow you to rename current tmux window.

Using shortcuts

You can edit .tmux.conf file and add following

bind-key -n C-S-Left swap-window -t -1
bind-key -n C-S-Right swap-window -t +1

1 2	bind-key -n C-S-Left swap-window -t -1 bind-key -n C-S-Right swap-window -t +1

Now you can use CTRL + SHIFT + LEFT OR RIGHT arrow to move windows.

See tmux

Setup Tor Hidden Service on CentOS 7

Tor is provided by EPEL repository on CentOS 7. Install EPEL repo with command

yum install epel-release

1	yum install epel-release

Install tor

yum install tor

1	yum install tor

Edit tor config file

vi /etc/tor/torrc

1	vi /etc/tor/torrc

Uncomment or add following lines

HiddenServiceDir /var/lib/tor/hidden_service/
HiddenServicePort 80 127.0.0.1:80

1 2	HiddenServiceDir /var/lib/tor/hidden_service/ HiddenServicePort 80 127.0.0.1:80

Restart tor with command

systemctl restart tor

1	systemctl restart tor

Now your tor hidden service is ready to use. You need to run your web application on 127.0.0.1:80

To see URL of your tor hidden service, run

cat /var/lib/tor/hidden_service/hostname

1	cat /var/lib/tor/hidden_service/hostname

Make sure to make a backup of folder “/var/lib/tor/hidden_service/” as it comtains keys for this .onion domain. If you lost it, you will lose your domain name. So it is very important you keep the files safe.

To stop/start tor, run

systemctl stop tor
systemctl start tor

1 2	systemctl stop tor systemctl start tor

See tor

Tor onion sites

ThePirateBay

See tor

tor

Setup Tor Hidden Service in Ubuntu/Debian
Setup Tor Hidden Service on CentOS 7
Tor onion sites

Tor Hidden Service in Ubuntu/Debian

To install tor on Ubuntu/Debian, run

apt install tor

1	apt install tor

Default configuration file for tor is /etc/tor/torrc

To enable hidden service, edit /etc/tor/torrc

vi /etc/tor/torrc

1	vi /etc/tor/torrc

uncomment lines

HiddenServiceDir /var/lib/tor/hidden_service/
HiddenServicePort 80 127.0.0.1:80

1 2	HiddenServiceDir /var/lib/tor/hidden_service/ HiddenServicePort 80 127.0.0.1:80

Create folder for your hidden service

mkdir /var/lib/tor/hidden_service/
chmod 700 /var/lib/tor/hidden_service/
chown -R debian-tor:debian-tor /var/lib/tor/hidden_service/

mkdir /var/lib/tor/hidden_service/

chmod 700 /var/lib/tor/hidden_service/

chown -R debian-tor:debian-tor /var/lib/tor/hidden_service/

You need to install Apache/Nginx etc.. to serve your web application. Make sure to configure web application listen on 127.0.0.0:80

Now restart tor with command

systemctl start tor@default

1	systemctl start tor@default

Ubuntu/Debian support multiple instances of tor. You can use command “/usr/sbin/tor-instance-create” to create new tor instance. Configuration for instanced tor available at /etc/tor/instances/INSTANCE_NAME/torrc

To see URL for your Hidden service, run

cat /var/lib/tor/hidden_service/hostname

1	cat /var/lib/tor/hidden_service/hostname

Example

root@lab:~# cat /var/lib/tor/hidden_service/hostname 
3w2pkr2qcusd6rx7zq4rulq7kt4xjpsgv7nxubcy2bdbgipy4wto4aid.onion
root@lab:~#

root@lab:~# cat /var/lib/tor/hidden_service/hostname

3w2pkr2qcusd6rx7zq4rulq7kt4xjpsgv7nxubcy2bdbgipy4wto4aid.onion

root@lab:~#

You should be able to visit the application using .onion link in Tor Browser.

You need to take backup of tor folder (/var/lib/tor/hidden_service) as it contains your secret keys, this is needed to use the .onion domain name. If you lose this, you will lose the .onion url.

To start the service on boot, run

systemctl enable tor@default

1	systemctl enable tor@default

See Tor

Proxmox 6 disable No valid subscription notice

To disable No valid subscription notice from proxmox, edit file

vi /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js

1	vi /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js

Find

if (data.status !== 'Active') {

1	if (data.status !== 'Active') {

This is on line 380. inside function checked_command

Replace with

if (false) {

1	if (false) {

Resart pveproxy

systemctl restart pveproxy

1	systemctl restart pveproxy

Zimbra webmail not working on port 80/443

On Zimbra mail server, webmail stopped working on Port 80/443. Admin interface worked properly on url https://hostname:7071/. There is no errors displayed under monitor tab of Zimbra Admin.

To fix, run

su - zimbra
zmprov ms `zmhostname` zimbraReverseProxySSLToUpstreamEnabled FALSE
zmprov ms `zmhostname` zimbraMailMode both
zmprov ms `zmhostname` zimbraReverseProxyMailMode both
./libexec/zmproxyconfig -e -w -o -a 8080:80:8443:443 -x both -H `zmhostname`
zmcontrol restart

su - zimbra

zmprov ms `zmhostname` zimbraReverseProxySSLToUpstreamEnabled FALSE

zmprov ms `zmhostname` zimbraMailMode both

zmprov ms `zmhostname` zimbraReverseProxyMailMode both

./libexec/zmproxyconfig -e -w -o -a 8080:80:8443:443 -x both -H `zmhostname`

zmcontrol restart

After running this, netstat -lntp start showing nginx running on port 80 and 443

root@zim:~# netstat -lntp | egrep "80|443"
tcp        0      0 127.0.0.1:10663         0.0.0.0:*               LISTEN      10980/zmlogger: zmr
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      11354/nginx.conf
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      11098/java      
tcp        0      0 116.203.102.86:8080     0.0.0.0:*               LISTEN      11098/java      
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      11354/nginx.conf
tcp6       0      0 :::7780                 :::*                    LISTEN      11707/httpd     
root@zim:~#