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Commands used in Dockefile - Part4

  Docker is an opensource tool used for virtualization and deliver software in the form of packages called Containers. It is one of the most important tools used in networking domain.  Dockerfile  is a template for building the image which contains commands needed to package the software. In this post, I am going to explain the commands ADD & COPY used in  Dockerfile .   ADD Command:   ADD command is used to copy files, directories or files from remote URLS to destination path in the image. The source paths can contain wildcards.   If the destination has relative path, it is relative to the Working directory of the image. Note that source path is always relative to the Docker build context.   ADD command will not support authentication. So, if there are any protected files to be added in  Dockerfile  building, use other tools like curl or  wget   Dockerfile  copying Single & Multiple files, directory using ADD inst...
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Vyos - An Open Source Network Operating System

What is a Network Operating System? 
Networking Operating System (NOS) is an Operating system that has the capability to support workstations, database sharing, application sharing, file, and printer access sharing among multiple computers in a network.
In general, NOS is a specialized operating system used for devices like router, switch or firewall.

Features of Networking Operating System: 
NOS has the following features:
  • Basic features like protocol support, processor support, hardware detection and multiprocessing support for applications
  • Authentication, access control, authorization, and restriction facilities are supported to provide security
  • Provides file service, web service, printing and replication
  • Has Naming and Directory Management services
  • Has the provision for user management and remote access & system management
  • Also has internetworking features like routing and WAN ports
  • Support clustering capabilities
Tasks by Network Operating System:
NOS can perform the following tasks:
  • System maintenance tasks like the backup of resources
  • Tasks related to managing files and users
  • Monitoring security of resources in the network
  • Assigning priority to print jobs in the network
Examples of Networking Operating System:
Some of the examples of the Networking Operating system are listed below:
  • Vyos is an open source NOS by Vyatta routing package
  • Cumulus Linux, an open source NOS based on TCP/IP stack of Linux
  • OpenWRT NOS used to route packets on embedded devices
  • FTOS or Force10 Operating System used on Force10 Ethernet switches
  • DD-WRT is used as firmware for wireless routers and access points
Introduction to Vyos:
Vyos is a popular Open source Linux based network operating system and was introduced in 2013.  As Vyos is able to run on ARM, amd64 and i586 systems, it can be used both as a firewall and router for cloud deployments.

Vyos also provides VPN functionality. Vyos is based on the Quagga routing engine and its configuration syntax, command line interface is similar to Juniper JUNOS.

Features of Vyos:
Vyos has the following features listed in categorical wise:
Supported Platforms:
Vyos includes support for the following platforms:
  • Both 32-bit and 64-bit of the x86 system
  • Kernel-Based Virtual Machine with virtio drives
  • Xen Hardware virtual machine along with open-vm tools
  • Hyper-V with drivers
  • Virtual box without guest additions
Routing Policies:
Vyos has the support for following router algorithms
  • Border Gateway Protocol (for both IPV4 and IPV6)
  • Open Shortest Path version2 and version3
  • Routing Information Protocol
  • Routing Information Protocol next generation
  • Routing based on policies
Supported Network Interfaces:
Vyos has the following interfaces:
  • Point-to-Point Protocol over Ethernet
  • Network Interface Card bonding
  • Bridges and Spanning Tree Protocol
  • Ethernet and 802.1 q VLAN
  • Q-in-Q Tunneling
  • Port mirroring and Port redirection
  • Psuedo ethernet or MAC VLAN
  • 802.11 Wireless protocol
Firewall and NAT Features: 
Vyos has the following features related to the firewall and NAT:
  • Stateful and Zone-based firewall
  • Destination and Source NAT
  • Network or Port groups or addresses groups only for IPV4
VPN Support: 
Vyos has the following VPN support
  • Site-to-Site IPsec tunnel
  • Supports Virtual Tunnel Interfaces
  • OpenVPN for Client, Server, and Site-to-Site
  • Generic Routing Encapsulation
  • IP in IP (IPIP) tunneling protocol
  •  IPIP version6
  • Virtual Extensive Local Area Network (VxLAN) tunnel
Network Services:
Vyos provides the following network services:
  • DHCP server along with the relay
  • DNS Server with caching ability
  • Web proxy with limited URL filtering capability
  • For remote management, Telnet and SSH protocols are supported
  • Support for QoS and IGMP proxy
High Availability:
For maintaining availability, Vyos has the following capabilities
  • Virtual Redundancy Routing Protocol
  • Conntrack sync to share information
  • Load balancing and Wide Area Network Failover
IPV6 Support:
In the case of Vyos, IPV6 features are as below:
  • IPV6 firewall and Routing
  • Advertisement of Routers
  • DHCP Client, DHCP Relay and DHCP Server
System Monitoring and Maintainence:
Vyos has the following features related to System monitoring and maintenance
  • Task Scheduler and support for SNMP protocol
  • Event handling and Remote Syslog
  • Remote archiving and configuration management
Vyos Image links and System requirements:
Vyos operating system can be downloaded by clicking here.  The system requirement to install vyos are:
  • Minimum RAM size 512MB
  • Minimum hard disk capacity of 2GB
The default username and password for the Vyos system is vyos and vyos respectively. The code of vyos operating system can be seen here. 

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