All, This problem seems to have resolved itself. As of 2018-10-26 02:25, mirror-master.debian.org reports ftp.utexas.edu as being up and current again.
As of 2018-10-28 03:15 UTC, the University of Texas has a related message on their status site: https://ut.service-now.com/utss/outage.do?sysparam_sys_id=950a4caadbddab8c819ec443059619f4
Campus Public FTP Server Outage OUTAGE: ftp.utexas.edu - 403 forbidden The server for ftp.utexas.edu has suffered irrecoverable hardware failure. Networking is investigating options for bringing up an alternate host/VM to function as ftp.utexas.edu. There is not a current estimated time to recovery, as the mirrors will also need to be re-built after the server is brought back online. Latest Update: 2018-10-24 12:04:22 -
There is no update or resolution notice posted, but the mirror seems to have been up and running for a little over 48 hours now. I added ftp.utexas.edu back to my sources.list and tried aptitude; it worked and is able to download and install packages from that mirror. I also tried manually downloading a couple of files from the mirror in Firefox and those worked OK. This report can probably be closed. Thanks! Matt Roberds
