Linux firewall web interface

How to Enable CSF Firewall Web UI

ConfigServer Security & Firewall (CSS) is an iptables based firewall for Linux systems. In our previous tutorial read installation tutorial of CSF on Linux system. CSF also provides in-built web UI for the managing firewall from the web interface. In this tutorial, you will find how to enable CSF Firewall Web UI on your system.

Step 1 – Install Required Perl Modules:

CSF UI required some of Perl modules to be installed on your system. Use the following commands to install required modules as per your operating system.

Debian based systems:

$ sudo apt-get install libio-socket-ssl-perl libcrypt-ssleay-perl \ libnet-libidn-perl libio-socket-inet6-perl libsocket6-perl

Redhat based systems:

$ sudo yum install perl-IO-Socket-SSL.noarch perl-Net-SSLeay perl-Net-LibIDN \ perl-IO-Socket-INET6 perl-Socket6

Step 2 – Enable CSF Firewall Web UI:

To enable CSF web UI edit /etc/csf/csf.conf file in your favorite text editor and update the following values.

# 1 to enable, 0 to disable web ui UI = "1" # Set port for web UI. The default port is 6666, but # I change this to 1025 to easy access. Default port create some issue # with popular chrome and firefox browser (in my case) UI_PORT = "1025" # Leave blank to bind to all IP addresses on the server UI_IP = "" # Set username for authetnication UI_USER = "admin" # Set a strong password for authetnication UI_PASS = "admin"

After making changes, edit /etc/csf/ui/ui.allow configuration file and add your public IP to allow access to CSF UI. Change OUR_PUBLIC_IP_ADDRESS with your public IP address.

$ sudo echo "YOUR_PUBLIC_IP_ADDRESS" >> /etc/csf/ui/ui.allow

Web UI works under lfd daemon. So restart the lfd daemon on your system using the following command.

Step 3 – Access and Use Web UI:

Now, access CSF UI on your browser with the specified port. For this tutorial, I have used 1025 port. This will prompt for user authentication first. After successful login, you will find the screen like below.

Allow IP Address – You can use below option to allow any IP quickly. This add the entry in /etc/csf/csf.allow file.

Deny IP Address – You can use below option to deny any IP quickly. This add the entry in /etc/csf/csf.deny file.

Unblock IP Address – You can use below option to quickly unblocked any IP which is already blocked by CSF.

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10 Useful Open Source Security Firewalls for Linux Systems

Being an Nix admin over 5+ years, I always be responsible for the security management of Linux servers. Firewalls plays an important role in securing Linux systems/networks. It acts like an security guard between internal and external network by controlling and managing incoming and outgoing network traffic based on set of rules. These set of firewall rules only allows legitimate connections and blocks those which are not defined.

There are dozens of open source firewall application available for download in the market. Here in this article, we’ve come up with 10 most popular open source firewalls that might be very useful in selecting one that suits your requirements.

1. Iptables

Iptables/Netfilter is the most popular command line based firewall. It is the first line of defence of a Linux server security. Many system administrators use it for fine-tuning of their servers. It filters the packets in the network stack within the kernel itself. You can find a more detailed overview of Iptables here.

Features of IPtables

1. It lists the contents of the packet filter ruleset.
2. It’s lightning fast because it inspects only the packet headers.
3. You can Add/Remove/Modify rules according to your needs in the packet filter rulesets.
4. Listing/zeroing per-rule counters of the packet filter rulesets.
5. Supports Backup and restoration with files.

2. IPCop Firewall

IPCop is an Open Source Linux firewall distribution, IPCop team is continuously working to provide a stable, more secure, user friendly and highly configurable Firewall management system to their users. IPCop provides a well designed web interface to manage the firewall. It’s very useful and good for Small businesses and Local PCs.

You can configure an Old PC as a secure VPN to provide a secure environment over the internet. It’s also keeps some frequently used information to provide better web browsing experience to its users.

Features of IPCop Firewall

1. Its Color coded Web Interface allows you to Monitor the performance Graphics for CPU, Memory and Disk as well as Network throughput.
2. It views and auto rotate logs.
3. Support Multiple language support.
4. Provides very secure stable and easily implementable upgrade and add on patches.

3. Shorewall

Shorewall or Shoreline Firewall is another very popular Open source firewall specialized for GNU/Linux. It is build upon the Netfilter system built into the Linux kernel that also supports IPV6.

Feature of Shorewall

1. Uses Netfilter’s connection tracking facilities for stateful packet filtering.
2. Supports a wide range of routers/firewall/gateway applications.
3. Centralized firewall Administration.
4. A GUI interface with Webmin control Panel.
5. Multiple ISP support.
6. Supports Masquerading and port forwarding.
7. Supports VPN

4. UFW – Uncomplicated Firewall

UFW is the default firewall tool for Ubuntu servers, it is basically designed to lesser the complexity of the iptables firewall and makes it more user friendly. A Graphical user interface of ufw, GUFW is also available for Ubuntu and Debian users.

Features of UFW

1. Supports IPV6
2. Extended Logging options with On/Off facility
3. Status Monitoring
4. Extensible Framework
5. Can be Integrated with Applications
6. Add/Remove/Modify Rules according to your needs.

5. Vuurmuur

Vuurmuur is another powerful Linux firewall manager built or manage iptables rules for your server or network. At the same time its very user friendly to administrate, no prior iptables working knowledge required to use Vuurmuur.

Features of Vuurmuur

1. Support IPV6
2. Traffic shaping
3. More advanced Monitoring features
4. Real time monitoring connection and bandwidth usage
5. Can be easily configured with NAT.
6. Have Anti-spoofing features.

6. pfSense

pfSense is another Open Source and a very reliable firewall for FreeBSD servers. Its based on the concept of Stateful Packet filtering. It offers wide ranges of feature which is normally available on expensive commercial firewalls only.

Features of pfsense

1. Highly configurable and upgraded from its Web – based interface.
2. Can be deployed as a perimeter firewall, router, DHCP & DNS server.
3. Configured as wireless access point and a VPN endpoint.
4. Traffic shaping and Real Time information about the server.
5. Inbound and Outbound load balancing.

7. IPFire

IPFire is another open source Linux based firewalls for Small Office , Home Office (SOHO) environments. Its designed with modularity and highly flexibility. IPfire community also took care of Security and developed it as a Stateful Packet Inspection(SPI) firewall.

Features of IPFire

1. Can be deployed as a firewall, a proxy server or a VPN gateway.
2. Content filtering
3. Inbuilt Intrusion detection system
4. Supports through Wiki, forums and Chats
5. Support hypervisors like KVM, VmWare and Xen for Virtualization environment.

8. SmoothWall & SmoothWall Express

SmoothWall is an Open Source Linux firewall with a highly configurable Web based interface. Its Web based interface is know as WAM (Web Access manager). A freely distributable version of SmoothWall is know as SmoothWall Express.

Features of SmoothWall

1. Supports LAN, DMZ, and Wireless networks, plus External.
2. Real Time content filtering
3. HTTPS filtering
4. Support proxies
5. Log viewing and firewall activity monitor
6. Traffic stats management on per IP, interface and visit basis
7. Backup and restoration facility like.

9. Endian

Endian firewall is another Stateful packet Inspection concept based firewall which can be deployed as routers, proxy and Gateway VPN with OpenVPN. Its originally developed from IPCop firewall which is also a fork of Smoothwall.

Features of Endian

1. Bidirectional firewall
2. Snort Intrusion prevention
3. Can secure web server with HTTP &FTP proxies, antivirus and URL blacklist.
4. Can secure Mail servers with SMTP and POP3 proxies, Spam Auto-learning, Greylisting.
5. VPN with IPSec
6. Real time Network traffic logging

10. ConfigServer Security Firewall

Last, But not the last Configserver security & firewall. It’s a cross platform and a very versatile Firewall, it’s also based on the concept of Stateful packet inspection (SPI) Firewall. It supports almost all Virtualization environments like Virtuozzo, OpenVZ, VMware, XEN, KVM and Virtualbox.

Features of CSF

1. Its daemon process LFD( Login failure daemon) checks for login failures of sensitive servers like ssh, SMTP, Exim, Imap,Pure & ProFTP, vsftpd, Suhosin and mod_security failures.
2. Can configure email alerts to notify if something goes unusual or detect any kind of intrusion on your server.
3. Can be easily integrated popular web hosting control panels like cPanel, DirectAdmin and Webmin.
4. Notifies excessive resource user and suspicious process via email alerts.
5. Advanced Intrusion detection system.
6. Can protect your linux box with the attacks like Syn flood and ping of death.
7. Checks for exploits
8. Easy to start/restart/stop & lots more

Other than these Firewalls there are many other firewalls like Sphirewall, Checkpoint, ClearOS, Monowall available in the web to secure your Linux box. Please let the world know which is your favourite firewall for your Nix box and leave your valuable suggestions and queries below in the comment box. I’ll come with another interesting article soon, till then stay healthy and connected with Tecmint.com.

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How to install firewalld Graphical User Interface on Linux

Here we let you know how to install a firewall-config GUI- graphical user interface to manage and configure firewalld on CentOS 8/7 /Stream Linux including Ubuntu server 19.04/18.04/16.04… and RHEL 7/8.

FirewallD is a tool which acts as a firewall in Linux operating systems. It helps in protecting the system from unusual traffic and also securing different protocols, by disabling them default. However, managing firewalld using a command line is cumbersome especially for those are not familiar with its commands. However, we can install a GUI-Graphical user interface for it, so that we can minimize the hassle and easily can configure and manage the firewallD firewall of Linux systems.

Install firewall-config GUI on CentOS 8/7 or RHEL

If you are using a Graphical based CentOS or Redhat system then use the single command given below to install firewalld graphical user interface.

sudo yum install firewall-config

Output for the above command:

[[email protected] ~]# yum install firewall-config Last metadata expiration check: 1 day, 19:08:05 ago on Tue 08 Oct 2019 12:45:40 PM EDT. Dependencies resolved. =============================================================================================================== Package Arch Version Repository Size =============================================================================================================== Installing: firewall-config noarch 0.6.3-7.el8 AppStream 157 k Transaction Summary =============================================================================================================== Install 1 Package Total download size: 157 k Installed size: 1.1 M Is this ok [y/N]: y Downloading Packages: firewall-config-0.6.3-7.el8.noarch.rpm 47 kB/s | 157 kB 00:03 --------------------------------------------------------------------------------------------------------------- Total 31 kB/s | 157 kB 00:05 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : firewall-config-0.6.3-7.el8.noarch 1/1 Running scriptlet: firewall-config-0.6.3-7.el8.noarch 1/1 Verifying : firewall-config-0.6.3-7.el8.noarch 1/1 Installed: firewall-config-0.6.3-7.el8.noarch Complete! [[email protected] ~]#

Now go to Activites menu and search for firewall, as the icon appears to click on that to start firewall-config GUI.

ncurses text-base GUI for firewalld

If you are using a Command-line CentOS 7 Linux server based on Redhat then this GUI will not work there until and unless you install the Desktop environment. But there is no point to install DE on CLI server, thus we can use ncurses (new curses) tool to provide a text-based GUI. The ncruses is a programming library providing an application programming interface (API) to get GUI apps for terminal running applications.

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