Both jump servers and bastion hosts are considered weak points and careful attention must be given to keep them up to date and monitored.ĭiagram of a bastion host between the public internet and internal network from O'Reilly DNS and BIND. In both cases, the connecting server can be treated as a single audit point for logging access to the subnetworks. Email servers, web servers, security honeypots, DNS servers, FTP servers, VPNs, firewalls, and security appliances are sometimes considered bastion hosts. The bastion host is intended to provide access to a private network from external networks such as the public internet. The two security zones are dissimilar but both are controlled.Ī bastion host is also treated with special security considerations and connects to a secure zone, but it sits outside of your network security zone. A jump server is a “bridge” between two trusted networks. It is usually security hardened and treated as the single entryway to a server group from within your security zone, or inside the overall network. It is sometimes called a “pivot server” for this reason: once you are logged in, you can “pivot” to the other servers. They each create a single point of entry to a cluster, but their intended purpose and architecture are subtly different in practice.Ī jump server is a virtual machine that is used to manage other systems. Usually you connect to them through SSH or RDP. As a Platform as a Service, it simplifies the process of setting up and administrating bastion hosts or jumpboxes in your cloud environment.īut what are bastion hosts or jumpboxes? And why would you use them, or a service like Azure Bastion?īoth bastion hosts and jumpboxes function similarly: they segregate between one private network or server group and external traffic. It uses Remote Desktop Protocol (RDP) and Secure Shell (SSH) network protocol alongside Secure Sockets Layer (SSL) encryption.īastion connects VMs, your local computers, and cloud resources without exposing them to public network connections. Microsoft recently revealed a service called Azure Bastion that allows customers a more secure way to connect and access virtual machines (VMs).
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