snmp configure in Ubuntu

 

apt install snmpd snmp libsnmp-dev

systemctl status snmpd

systemctl stop snmpd

Ufw port allow

=============

Ufw allow 161

Configuration file

===============

vim /etc/snmp/snmpd.conf

SNMPv2 Configure:

=================

nano /etc/snmp/snmpd.conf

agentaddress udp:127.0.0.1:161,udp:10.200.6.53:161,udp6:[::1]:161

rocommunity  TrianglE

Note : 10.200.6.53 –interface ip

SNMPv3 configure

==============

sudo ufw allow 161/udp

apt install snmpd snmp libsnmp-dev

systemctl stop snmpd

nano /etc/snmp/snmpd.conf

======================

#add below line

agentaddress udp:161,udp6:[::1]:161

--create snmpv3 user

sudo net-snmp-config --create-snmpv3-user -ro -A "SHA%%%%^^^123" -X "AES%%%%^^^123" -a SHA-512 -x AES Usr.TrianglE

systemctl start snmpd

Verify:

— this for snmp v2 check

snmpwalk -v2c -c <community> 127.0.0.1

snmpwalk -Os -c <community> -v 2c <des-ip>

firewall-cmd on Centos7

 You can add the ports with the following command:
firewall-cmd --permanent --add-port=53/tcp
firewall-cmd --permanent --add-port=53/udp
firewall-cmd --reload

SMTP port allow:
firewall-cmd --permanent --add-port=25/tcp
firewall-cmd --permanent --add-port=25/udp
firewall-cmd --reload

HTTP 8080 Port allow:
firewall-cmd --permanent --add-port=8080/tcp
firewall-cmd --permanent --add-port=8080/udp
firewall-cmd --reload

You can add the service with the following command:
firewall-cmd --permanent --add-service=ssh
firewall-cmd --permanent --add-service=telnet
firewall-cmd --permanent --add-service=smtp
firewall-cmd --permanent --add-service=snmp


You can print the whole Firewalld configuration with the following command:
firewall-cmd --list-all

to see what services are allowed to have open ports:
firewall-cmd --list-services
firewall-cmd --list-ports

You can remove the service with the following command:
firewall-cmd --permanent --remove-service=ssh
firewall-cmd --permanent --remove-service=telnet
firewall-cmd --permanent --remove-service=dns
firewall-cmd --permanent --remove-service=dhcpv6-client


check open port from another server:
nmap -sT 113.21.228.1



--to check firewalld stop/start/status
systemctl stop firewalld
systemctl start firewalld
systemctl status firewalld


--Disable the FirewallD service to start automatically on system boot:
systemctl disable firewalld











Rich Rules:





-- Add Rich Rule
firewall-cmd --permanent --zone=public --add-rich-rule 'rule family="ipv4" source address="113.21.229.224/27" port port="804" protocol="tcp" accept'
firewall-cmd --permanent --zone=public --add-rich-rule 'rule family="ipv6" source address="2400:f940::/32" port port="804" protocol="tcp" accept'
firewall-cmd --permanent --zone=public --add-rich-rule 'rule family="ipv4" source address="0.0.0.0/0" port port="804" protocol="tcp" reject'
firewall-cmd --permanent --zone=public --add-rich-rule 'rule family="ipv6" source address="::/0" port port="804" protocol="tcp" reject'

--Check Rich Rule
firewall-cmd --list-rich-rules

--Remove Rich Rule
firewall-cmd --permanent --zone=public --remove-rich-rule 'rule family="ipv4" source address="0.0.0.0/0" port port="804" protocol="tcp" reject'
firewall-cmd --permanent --zone=public --remove-rich-rule 'rule family="ipv6" source address="::/0" port port="804" protocol="tcp" reject'

How to Remove a deb package

Get the package complete name:
dpkg --list | grep partial_package_name*

Remove the package:
sudo apt-get remove package_name


Remove all the dependencies:
sudo apt-get purge package_name


Remove the unneeded packages that were once installed as a dependency:
sudo apt-get autoremove

Remove the retrieved packages from the local cache:
sudo apt-get autoclean

Check that it was completely removed:
dpkg --list | grep partial_package_name*


Finally, do a clean so you check everything is correctly removed

sudo apt-get clean

ufw in Ubntu

 sudo ufw status --check the status
sudo ufw disable -- for disable
sudo ufw enable  -- for enable
sudo ufw reload  -- for rload
sudo ufw reset  -- for reset
sudo ufw app list -- to check app list
sudo ufw status numbered --list all of the current rules
sudo ufw status verbose



sudo ufw default deny incoming
sudo ufw default allow outgoing


--INstall UFW
sudo apt update
sudo apt install ufw

--Allow SSH accss
sudo ufw allow ssh
or
sudo ufw allow 22/tcp


How to add More Rules

sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw allow 25/tcp
sudo ufw allow https/tcp


--For radiusd
ufw allow 1812/tcp
ufw allow 1812/udp
ufw allow 1813/tcp
ufw allow 1813/udp
ufw allow 1521/tcp
ufw allow 1521/udp


You can allow port ranges too say, tcp and udp 4000 to 6000:
$ sudo ufw allow 4000:6000/tcp
$ sudo ufw allow 4000:6000/udp


How to reject port
$ sudo ufw reject in smtp
$ sudo ufw reject out smtp
$ sudo sudo ufw reject 1194 comment 'No more vpn traffic'
$ sudo ufw reject 23 comment 'Unencrypted port not allowed'

Cisco IOS for GNS3

 

 

 You can download Cisco IOS for GNS3 from here.

 

 

Cisco Router:

Download: Cisco IOSv 15.6 

Download: Cisco IOS XE CSR1000v 16.8.1a

Download: Cisco IOS XRv 6.0.1

Download : Cisco 7200 124-24.T5

 

 

Cisco L2 Switch:  

 Download Cisco IOSv L2 15.2.1

Download : Cisco IOU L2

Download : Cisco IOU L3 

 

Download : Micro Core Linux Version 6.4

 

 

 

How to stop Windows 10 update

Install Cacti Network Monitoring Tool on CentOS 6.4 / RHEL 6.4 / Scientific Linux 6.4

Cacti is an open source, front-end for the data logging tool called RRDtool. It is a web based network monitoring and graphing tool. For more information about Cacti refer the official link.

How to change Apex Admin Password

login as: root
root@202.65.168.20's password:
Last login: Fri Nov 14 14:28:08 2014 from 114.130.138.17
[root@fws ~]# source /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh
[root@fws ~]# cd /u01
[root@fws u01]# ls
app

How to block facebook in Mikrotik using L7 Protocols (Layer 7)

http://rbgeek.wordpress.com/2012/05/29/how-to-block-facebook-in-mikrotik-using-l7-protocols-layer-7/?blogsub=confirming#subscribe-blog

How To Install and Secure phpMyAdmin on a CentOS 6.4 VP

Ref.link

https://www.digitalocean.com/community/tutorials/how-to-install-and-secure-phpmyadmin-on-a-centos-6-4-vps-

Introduction

Many websites and applications require databases to store and manage large sets of information. MySQL and MariaDB are popular database management systems because of their flexibility, power, and ubiquity.
For many users, managing databases is difficult from the command line. For those who prefer to use a web interface, phpMyAdmin is a great alternative to command driven management.
In this guide, we will cover how to install and configure phpMyAdmin on a CentOS 6.4 VPS. The procedure should be fairly similar for other versions.

Step One –– Add EPEL Repositories

The phpMyAdmin package is not included in the CentOS default repositories, but it is available in the Fedora Projects EPEL (Extra Packages for Enterprise Linux) repositories.
We can add the repository to our yum source list by downloading a configuration file from the repository itself. Run the following command:

cd ~
wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

Note that even though this file is coming from the 64 bit repository, it is architecture agnostic, meaning it will work for either 32 bit or 64 bit installations.
This will download the package into our home directory. Install it by typing:

sudo rpm -ivh epel-release*

Your installation now is aware of the EPEL repositories and will query it for packages.
We can check this by typing:

yum repolist

. . .
repo id         repo name                                       status
base            CentOS-6 - Base                                 6381
epel            Extra Packages for Enterprise Linux 6 - x86_64  9788
extras          CentOS-6 - Extras                                 13
updates         CentOS-6 - Updates                              1336
repolist: 17518

As you can see, the EPEL repo is present.
Since the repository is entered in the system now, you can remove the repository configuration package by typing:

rm epel-release*

Step Two –– Download and Configure MySQL

To use phpMyAdmin, you need database software to administer. We will install MySQL and preform some initial configuration from the command line.
To install it, simply type: