Slow HTTP downloads through Cisco ASA 5500

Tue, 28 Feb 2012 16:15:20 +0000

Recently we noticed weird behavior downloading files from certain sites. The transfer would start out fast (around 10 MB/s), then after a couple of seconds it would plummet to around 9 KB/s. It didn’t happen for every file or every site: downloads from S3 buckets were still particularly fast. But some files that I remember being particularly fast were now showing this weird fast/slow/fast/slow behavior, for example the Sun JDK and ISOs from rit.edu that used to saturate our pipe were now getting all cRAzY.

Cisco on Evan Hoffman

Slow HTTP downloads through Cisco ASA 5500