System frequently stops responding...

[Alan Buxey]

How many threads are you running with?  64, 128? How many concurrent requests are you configured to deal with?  Number of nas clientsx256 (remember that remote proxies are clients too)?

In the end you need to deal with the source of your problem.  You can hack at relieving the symptoms but you still have the disease to cure which may otherwise affect you in other ways.  Talk with your upstream proxy server admins.  Find where the issue is. ..firewall,  NAT, wrong outbound address,  incorrect shared secret etc etc.  Fix that. 

And use status-server against them

alan