What is Open VPN?
Open VPN stands for open-source VPN protocol implemented on point-to-point or site-to-site network. It travels largely through firewalls and NATs(Network Address Translators). The purpose of authentication is fulfilled by assigning authentication certificates to users. It checks the username, password, and pre-shared secret key. Different encryption protocols are Open SSL, TLsv1/SSLv3. Open VPN for different operating systems are as follows:-
| Column 1 | Column 2 |
|---|---|
| Windows | Open VPN GUI |
| Mac OS | Tunnel blick |
| Linux | Terminal |
| iOS | OpenVPN Connect app |
| Android | OpenVPN Connect app |
| Raspberry Pi | Terminal |
Advantages of VPN
- Highly stable
- Exclusive authentication
- Strongly manage and control network centrally or remotely.
- Supports smart cards
- Excellent security against active and passive attacks.
- Portable
- Easy to use
- Quick recovery from damage
- High-level design and multiple features.
- Fastest execution speed
- Provides security for both servers and clients.
- Carry large loads
Disadvantages of VPN
- The cost of installation is much more.
- Few proxy servers are unsupported
- The complex method of setup and installation.
- Requires much other software for establishing a connection.
How Does Open VPN work?
- Encryption and authentication- Open SSL library and advanced HMAC signature technology.
- Transmission of tunneled data by UDP or TCP if the former fails.
- Can easily bypass HTTP and NAT.
- Runs in user space rather than kernel space.
VPN Clients – Why are Clients looking for VPN?
People are purchasing VPN technology as it is becoming of utmost necessity. IT industries are demanding VPN for enhanced security across traffic, interlinked sites, and remote individuals. Clients find it flexible and ideal management of data packets across the network. The latest upgraded VPNs support large devices in numbers in the network. Besides this set up is becoming easy and automatic. Clients purchase VPN from many sellers other than Microsoft, Cisco. Organizations having 20 or more clients use NCP secure tools. Small organizations do not require any accessory tool to utilize VPN.
What is IPsec?
IPSec is a collection of protocols for encrypting data packets. It stands for Internet Protocol security. It perfectly meets the objectives of keeping data secret during transmission.
How does IPsec work?
The steps of working of IPSec are as follows:-
- Exchange of keys between devices
- Attachment of data, the message with headers and trailers
- Encryption is by transport mode instead of tunnel mode.
- Data transmission by UDP (User Datagram Protocol).
- Proper decryption at the receiver’s end.
What protocols are used in IPsec?
- Authentication Header (AH)
- Encapsulating Security Protocol (ESP)
- Security Association (SA)