Release Notes: IBM Aspera FASP Proxy 1.4.1
Release Notes: IBM Aspera FASP Proxy 1.4.1

Release Notes: IBM Aspera FASP Proxy 1.4.1

Product Release: July 7, 2017
Release Notes Updated: April 18, 2018

This release of IBM Aspera Proxy provides the new features, fixes, and other changes listed below. Additional sections cover system requirements and known problems.


  • Sync can now be used with Reverse Proxy with round-robin load balancing.
  • Reverse Proxy can now use the aspera.conf option bind_source_address to bind the outgoing TCP/UDP channel to a specific IP address.
  • Reverse Proxy now supports authenticated HTTP-fallback transfers by using Nginx with a custom authentication module. (CIM-581)


Note: This release contains tickets created from different issue-tracking systems. For this reason, the list below uses two different formats for issue numbers.

ATT-200 - Forward Proxy might send TCP and UDP sessions to different hosts if the target is a DNS name using round-robin DNS with port reuse disabled. (CIM-139)

ATT-97 - Reverse Proxy creates an iptables rule when there is an error receiving an open session response from the downstream ascp process. (CIM-101)

#36055 - Reverse Proxy does not work when Proxy is multi-homed and the <bind_source_address> option in aspera.conf is not set to the internal IP address. (CIM-246)

#24270 - Transfers cannot be made to a server with a docroot on Azure if routed through an Aspera Proxy server.

#24012 - host_domain rules created in Reverse Proxy are not respected.

#19205 - Proxy does not support HTTP fallback.


Linux 64-bit: RedHat 6, CentOS 6-7, Fedora 15-20, Ubuntu 12-14, Debian 6-7, SLES 11, Kernel 2.6 or higher, and libc version GLIB 2.5+.


Linux 64-bit (deb): aspera-proxy-
md5: 82d5dd1e135a7bc122737ce8b3ff6121
sha1: affc6edf4bde7a84f33ab2071d90b59ce2c049a9
Linux 64-bit (rpm): aspera-proxy-
md5: 6842455097d534032922739e8bc61d05
sha1: 7187cdff905621bc9cc49f6ae2780513b5b28739


ATT-155 - Proxy does not support A4 transfers. (CIM-130)

ES-322 - The output from ascp -A does not include the proxy license. (CIM-509)

ES-225 - Aspera clients using ascp version 3.1.1 or earlier are mapped by Reverse Proxy to the first domain rule specified in aspera.conf if only a host_domain rule is set. Workaround: Set a host_ip rule for the desired domain rule. (CIM-337)

ES-188 - Transfers through Aspera Forward Proxy are rejected if the node user password contains an @ symbol. (CIM-290)

#34615 - When you configure Forward Proxy in the Aspera server GUI (Preferences > Proxy > Enable transfer proxy), the GUI applies TCP and UDP rules from Forward Proxy to the Aspera server GUI connections.

#21288 - On some Linux platforms (for example, SUSE) the iptables-restore command is not located in /sbin but /usr/sbin. Workaround: Create a symlink in /sbin for /usr/sbin/iptables-restore.

#19185 - If you specify a directory for <log_dir>, the log file is created with 0640 permissions. As a result, not all transfers will be logged. Workaround: Once the log file has been created, change its permissions to 0660.


For online support resources for Aspera products, including raising new support tickets, please visit the Aspera Support Portal. Note that you may have an existing account if you contacted the Aspera support team in the past. Before creating a new account, first try setting a password for the email that you use to interact with us. You may also call one of our regional support centers.