---
title: "Glacier2"
url: https://docs.zeroc.com/ice/3.8/services/glacier2
docs_index: https://docs.zeroc.com/llms.txt
---

> For an index of every page, see [llms.txt](https://docs.zeroc.com/llms.txt).

# Glacier2

Glacier2 is a router that forwards client requests to servers on another network, typically behind a firewall. It also forwards server callbacks to clients over their existing connections. A client authenticates with the router by creating a session, and the router forwards the requests of this client for the duration of the session.