sts_close_handle failed: 2060019 error occurred on network socket

aam getting the error when trying to back up a server accross the firwall to MSDP pool with client dedupe enalbed

I have made the following changes

Putty onto Netbackup appliance and ruin the command below on command prompt.

$ sysctl -w net.ipv4.tcp_keepalive_time=900

remote client

Make the following as a registry file to import. It will create values to change the retry time on timed-out connections to 30 seconds (from a default of ~4 minutes); and a ~15 minute wait to check on established connections (default is hours-days).

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"KeepAliveTime"=dword:000dbba0
"TCPTimedWaitDelay"=dword:0000001e

the backups are still failing with error 87