# Cross-Cell Authentication {% hint style="info" %} **THIS PAGE IS OBSOLETE AND CONTAINS HISTORICAL INFORMATION.** {% endhint %} **OpenAFS Cross-cell** authentication is currently used so all students can access portions of AFS file space (for temporarily relocated netware files). The process by which this occurs is mostly automatic, but the local cell giving access (CSL.TJHSST.EDU in our case), must create the group system: where foreign.cell is the foreign cell; in our case, LOCAL.TJHSST.EDU. So, first, the group system: must be created. After that is done, anyone that tries to `aklog` with tickets from the LOCAL realm will automatically create themselves a foreign account in the CSL cell, if they don't already have one. Keep in mind that the number of foreign users for the LOCAL realm/cell is capped by the group quota of system:. Originally, this was set to 0, which actually means a limit of 30 (confusingly enough). As of the time of this writing, it is set to 1800 to accomodate for all students, but set it to be larger with `pts setfields` if it needs to be larger. If you attempt to exceed the limit, pts will issue an error saying you cannot create any more groups. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://documentation.tjhsst.edu/obsolete/afs/cross-cell.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.