How to setup minicom on Linux for EdgeRoute from Ubnt (EdgeOS)

The edge router comes with a console port where you can see all the information from startup to any error message.


I have had some trouble finding linux on how to set the minicom to see what the router console looks like.
The correct settings go into the configuration file. /etc/minicom/minirc.dfl

pu port /dev/ttyUSB0
pu baudrate 115200
pu bits 8
pu parity N
pu stopbits 1
pu rtscts No
pu xonxoff No

source of information: here

On your linux may differ in serial port so i recommend you to look for it so:

root@debian:~# setserial -g /dev/ttyS[0123]
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3

I hope the information was helpful. An excellent day.

Yum update failed!

If you get next error:

–> Processing Dependency: libsemanage >= 2.5-13 for package: selinux-policy-3.13.1-229.el7_6.6.noarch
—> Package selinux-policy-targeted.noarch 0:3.13.1-192.el7_5.6 will be updated
—> Package selinux-policy-targeted.noarch 0:3.13.1-229.el7_6.6 will be an update
–> Processing Dependency: policycoreutils >= 2.5-24 for package: selinux-policy-targeted-3.13.1-229.el7_6.6.noarch
—> Package tzdata.noarch 0:2018f-2.el7 will be updated
—> Package tzdata.noarch 0:2018g-1.el7 will be an update
–> Finished Dependency Resolution
Error: Package: selinux-policy-3.13.1-229.el7_6.6.noarch (updates)
Requires: policycoreutils >= 2.5-24
Installed: policycoreutils-2.5-22.el7.x86_64 (@base)
policycoreutils = 2.5-22.el7
Error: Package: selinux-policy-targeted-3.13.1-229.el7_6.6.noarch (updates)
Requires: policycoreutils >= 2.5-24
Installed: policycoreutils-2.5-22.el7.x86_64 (@base)
policycoreutils = 2.5-22.el7
Error: Package: kernel-3.10.0-957.1.3.el7.x86_64 (updates)
Requires: linux-firmware >= 20180911-68
Installed: linux-firmware-20180220-62.2.git6d51311.el7_5.noarch (@updates)
linux-firmware = 20180220-62.2.git6d51311.el7_5
Available: linux-firmware-20180220-62.git6d51311.el7.noarch (base)
linux-firmware = 20180220-62.git6d51311.el7
Error: Package: selinux-policy-3.13.1-229.el7_6.6.noarch (updates)
Requires: libsemanage >= 2.5-13
Installed: libsemanage-2.5-11.el7.x86_64 (@base)
libsemanage = 2.5-11.el7
You could try using –skip-broken to work around the problem
You could try running: rpm -Va –nofiles –nodigest

Solutions for this in next pictures:

yum update

[root@cx21 ~]# yum clean all
[root@cx21 ~]# rm -rf /var/cache/yum

Unable to login to Roundcube: PHP Error: Failed to create a user record.

Error found in error logs:

[28-Nov-2018 14:14:25 +0200]: <4d284o3h> DB Error: [1364] Field 'alias' doesn't have a default value (SQL Query: INSERT INTO `users` (`created`, `last_login`, `username`, `mail_host`, `language`) VALUES (now(), now(), '', 'localhost', 'en_US')) in /var/www/html/roundcubemail-1.0.3/program/lib/Roundcube/rcube_db.php on line 543 (POST /?_task=login&_action=login)
[28-Nov-2018 14:14:25 +0200]: <4d284o3h> PHP Error: Failed to create new user in /var/www/html/roundcubemail-1.0.3/program/lib/Roundcube/rcube_user.php on line 686 (POST /?_task=login&_action=login)
[28-Nov-2018 14:14:25 +0200]: <4d284o3h> PHP Error: Failed to create a user record. Maybe aborted by a plugin? in /var/www/html/roundcubemail-1.0.3/program/include/rcmail.php on line 650 (POST /?_task=login&_action=login)

List from useres table in roundcube database.
MariaDB [roundcube]> describe users;
| Field | Type | Null | Key | Default | Extra |
| user_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| username | varchar(128) | NO | MUL | NULL | |
| mail_host | varchar(128) | NO | | NULL | |
| alias | varchar(128) | NO | MUL | NULL | |
| created | datetime | NO | | 1000-01-01 00:00:00 | |
| last_login | datetime | YES | | NULL | |
| language | varchar(5) | YES | | NULL | |
| preferences | text | YES | | NULL | |
| failed_login | datetime | YES | | NULL | |
| failed_login_counter | int(10) unsigned | YES | | NULL | |

Solutions: Remove alias column from users table.

Connect database:
mysql -u root -p

Use database you need to make change:
MariaDB [(none)]> use roundcube;

Alter table users;
ALTER TABLE roundcube.users DROP COLUMN roundcube.users.alias;

Now problem solved !



Easy Install cbpolicyd On CentOS 7

I have encountered the situation when users have weak passwords and are guessed by spammers so valid accounts are used for SPAM. The solution they choose in case is the limitation of mails sent over a period of time.

1. Install dependencies on the application

yum install -y mariadb mariadb-server perl-Cache-FastMmap perl-Config-IniFiles

2. Download and install policyd rpm package and source files for setting up db.

rpm -Uvh cluebringer-2.0.14-1.noarch.rpm

3. Settings database.

cd cluebringer-v2.0.14/database/

Prepare sql file

for i in core.tsql access_control.tsql quotas.tsql amavis.tsql checkhelo.tsql checkspf.tsql greylisting.tsql;
./convert-tsql mysql $i
done > policyd.sql

Change in file
sed -i 's/TYPE=InnoDB CHARACTER SET latin1 COLLATE latin1_bin//' policyd.sql

4. Create database and populate.
mysql -u root -p
create database policyd;
GRANT all on policyd.* to ‘policyd’@’localhost’ identified by ‘Your-password’;
mysql -u root -p policyd < policyd.sql

5. Configure cbpolicyd database on webui.conf

vim /etc/policyd/cluebringer.conf
config line like this

vim /etc/policyd/webui.conf
config line like this

6. Setup in your page policyd and postfix.
Access for config file
cd /var/www/html/
ln -s /usr/share/cluebringer/webui/ policyd

Now you need to create your apache access with vhosts.

Modify postfix
Add the following Postfix config setting in BOTH smtpd_recipient_restrictions and

smtpd_end_of_data_restrictions: check_policy_service inet:

It’s recommended to add these parameters first, i.e.:

smtpd_recipient_restrictions = check_policy_service inet:, permit_mynetworks, ..

You can check logs on /var/log/cbpolicyd.log and /var/log/maillog
Start service /etc/init.d/cbpolicyd start
[root@mail html]# systemctl enable cbpolicyd
cbpolicyd.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig cbpolicyd on

How to install Shrew Cisco VPN client in Ubuntu 16.04

Source of inspiration  for this page:

First Step: prepare for instalation!

apt-get install g++
apt-get install build-essential linux-headers-$(uname -r)
apt-get install flex
apt-get install libedit2 libedit-dev
apt-get install bison
apt-get install cmake
apt-get install openssl
apt-get install qt-sdk

Second step: Download and install ike from Shrew.
Go to page and download last version !

Unpacking the package

tar -zxvf ike-2.2.1-release.tgz
cd ike
make install

Now finish
### Start IKE daemon
## /home/$user/Documents/Lucian/Linux/ike/script/linux/iked start

You need to start ike daemon.
Now start client:
qikea &

Enjoy !

How to remove domain from letsencrypt ?

Q:  Do you have a domain that you want to remove from the list of certificates with letencrypt?

Answer: Simple deletion from the list

certbot delete --cert-name

If you get error:
No certificate found with name (expected /etc/letsencrypt/renewal/

Use next command:

certbot delete --cert-name

Setup Vacation on Postfixadmin 3.2 Centos 7.x

This year we set up a new server with Postfixadmin 3.2 and I recently also had to set the vacation module.
I want to outline how I’ve solved the problem that appears on setup.

1. Install perl library dependancies:

yum install perl-Email-Valid perl-Email-Sender perl-Email-Simple perl-Test-Email perl-Try-Tiny perl-MIME-Charset perl-MIME-EncWords perl-Log-Log4perl perl-Log-Dispatch perl-Test-mysqld

For Debian:

apt-get installlibmail-sender-perl
libdbd-mysql-perl libemail-valid-perl libmime-perl liblog-log4perl-perl
liblog-dispatch-perl libgetopt-argvfile-perl libmime-charset-perl

2.  Add user and group, crete folder.
groupadd -r -g 65501 vacation
useradd -r -u 65501 -g vacation -d /var/spool/vacation -s /sbin/nologin vacation

mkdir /var/spool/vacation
cp /var/www/html/postfixadmin/VIRTUAL_VACATION/ /var/spool/vacation
chown -R vacation:vacation /var/spool/vacation

chmod -R 750 /var/spool/vacation/

3. Setup script.

vim /var/spool/vacation/

our $db_type = ‘mysql’;
our $db_username = ‘postfix’;
our $db_password = ‘yourdbpasswd’;
our $db_name = ‘postfix’;

our $vacation_domain = ‘’;

close file with :wq

Setup config.local.php
vim /var/www/html/postfixadmin/config.local.php

$CONF[‘vacation’] = ‘YES’;
$CONF[‘vacation_domain’] = ‘’;

4. Config vacation in postfix

vim /etc/postfix/


vacation unix – n n – – pipe
flags=Rq user=vacation argv=/var/spool/vacation/ -f ${sender} — ${recipient}

( do not forget to add some space in front  “flags=….. ” )

Make sure you have this line in /etc/postfix/

transport_maps = hash:/etc/postfix/transport

vim /etc/postfix/transport    vacation:

Save file and close. After this:

postmap /etc/postfix/transport

Restart Postfix

systemctl restart postfix.service.

Follow these steps if you get an error in logs like this:

Aug 20 14:25:01 mail postfix/pipe[24086]: 43AF03E0B63: to=<>, orig_to=<>, relay=vacation, delay=2, delays=1.4/0.01/0/0.56, dsn=5.3.0, status
=bounced (Command died with status 255: “/var/spool/vacation/”. Command output: Attribute (ssl) does not pass the type constraint because: Validation failed for ‘Bool’ with value “starttls” at
constructor Email::Sender::Transport::SMTP::new (defined at /usr/share/perl5/vendor_perl/Email/Sender/Transport/ line 200) line 98, <STDIN> line 38. Email::Sender::Transport::SMTP::new(‘Email::Sen
der::Transport::SMTP’, ‘HASH(0x433e128)’) called at /var/spool/vacation/ line 474 main::send_vacation_email(‘’, ‘’, ‘’, ‘<b2f160c>’, 456, 0) called at /var/spool/vacation/ line 657 )


vim /var/spool/vacation/

and change

our $smtp_ssl = ‘ssl’
our $smtp_ssl = ‘0’

Free SSL for web, easy way !

I want say very short steps to make you page secure SSL with “Let’s Encrypt


Our case, we consider a server where we have ssh access, and we can modify configuration files from apache and restart services.

First step, install certbot.
yum install certbot

Second, request key for you webpage:
certbot certonly –webroot -w /var/www/html/roundcubemail/ -d

If you run for the first time here, you will get some questions:

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Enter email address (used for urgent renewal and security notices) (Enter ‘c’ to
Starting new HTTPS connection (1):

Please read the Terms of Service at You must
agree in order to register with the ACME server at
(A)gree/(C)ancel: A

Next step you will get the key !

– Congratulations! Your certificate and chain have been saved at:
Your key file has been saved at:
Your cert will expire on 2018-10-07. To obtain a new or tweaked
version of this certificate in the future, simply run certbot
again. To non-interactively renew *all* of your certificates, run
“certbot renew”
– Your account credentials have been saved in your Certbot
configuration directory at /etc/letsencrypt. You should make a
secure backup of this folder now. This configuration directory will
also contain certificates and private keys obtained by Certbot so
making regular backups of this folder is ideal.
– If you like Certbot, please consider supporting our work by:

Donating to ISRG / Let’s Encrypt:
Donating to EFF:

Final step create you own VHOST config in web server.

SSLEngine On
SSLCertificateFile /etc/letsencrypt/live/
SSLCertificateKeyFile /etc/letsencrypt/live/
DocumentRoot /var/www/html/roundcubemail
CustomLog /var/log/httpd/webmailssl_access.log common
ErrorLog /var/log/httpd/webmailssl_error.log

and restart you apache server:  systemctl restart httpd

Frecvente utilizate în Romania de operatorii de telefonie mobila!

Care sunt frecvențele utilizate de Orange România pentru retelele 2G, 3G si 4G ?

2G = 900 Mhz / 1800 Mhz
3G = 2100 Mhz / 900 Mhz
4G = 800 Mhz / 1800 Mhz / 2600 Mhz. Sursa

Care sunt frecventele pentru Vodafone ?
3G:900 si in orasele mari 2100
4G:800 și 1800 (mai ales 1800 ) [ 4G/LTE in benzile 3 si 20 (1800/800 Mhz). ]

Care sunt frecventele pentru Telekom ?
2G = 900 si 1800
3G = 900 și 2100
4G = 800, 900 și 1800

Care sunt pentru Digi ?
3G = 900Mhz si 2100Mhz
4G = banda 1 2100 Mhz FDD, banda 38 2600 Mhz TDD

O poza cu benzile în 4G în Romania, update 24.05.2018.

Network 4G Romania
Network 4G Romania

Redirect your visitors to SSL webpage!

After we’ve been able to get a free SSL certificate for our page now, we need to redirect to the SSL page.
According to Apache, the best way is to avoid using mod_rewrite !

< VirtualHost *:80 >
Redirect "/" ""
< /VirtualHost >

< VirtualHost *:443 >
    # ... SSL configuration goes here
< /VirtualHost >

I think this is the easiest way to redirect SSL from a non-SSL page.