Communications path finding

A system, comprising:

• a computer that includes a processor and a memory, the memory including instructions executable by the processor to:
• identify a communications node, included in a network for a first computer network that includes network device nodes, that includes connectivity to an external computer network;
• identify a source node included in the network device nodes;
• execute a non-recursive algorithm on a list of network paths in the first computer network that connect the source node to the communications node, wherein the non-recursive algorithm includes a first stack of stack references to second stacks wherein the second stacks include references to the network device nodes;
• identify, from the list of network paths, a preferred network path that includes a fewest number of nodes between the source node and the communications node;
• and
• communicate from the source node to the external computing network via the preferred network path and the communications node.