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https://issues.apache.org/jira/browse/GUACAMOLE-127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15702155#comment-15702155
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Robin commented on GUACAMOLE-127:
---------------------------------
After further testing this is indeed a problem with the reverse proxy. In
particular two configuration changes needed to be made in IIS / ARR.
By default connections are limited to 120 second and request size is filtered
to 30000000 Bytes (30MB).
To adjust this I had to select the site, click on limits and adjust the
connection timeout to a higher value. e.g. 3600 seconds.
For the request filter size, again select the site, the request filtering and
then on limits and adjust the "Maximum allowed content length (bytes)" to a
higher value. e.g. 4294967295
Large files now upload fine.
> Large file uploads fail with access denied error
> ------------------------------------------------
>
> Key: GUACAMOLE-127
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-127
> Project: Guacamole
> Issue Type: Bug
> Components: guacd-docker
> Affects Versions: 0.9.10-incubating
> Environment: Ubuntu 16 running docker images built from latest 0.9.10
> connecting to RDP server and using SFTP for file transfers
> Reporter: Robin
>
> When starting a large file transfer, the upload progresses but no data is
> written to the SFTP server. Sometimes the upload gets to 1.1GB and then
> restarts itself before eventually giving an "Access denied" error.
> Occasionally a 0 byte file is created on the SFTP server. Smaller uploads up
> to a few hundred MB will work.
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