On Thursday 21 August 2008 02:33:31 Jason Haar wrote:
> So: which of the timeout options should I look at increasing?
> "checks_read_timeout"? 

This will affect all network connections. You should increase it on a slow 
WAN. Keep in mind that the value in nessusd.conf is only a default, and that 
it may be overridden by the client (from your .nessusrc or your Nessus XML 
policy).

> "Services[entry]:Network connection timeout"? 

This only affects find_service.nasl. There is a second timeout (for read).
Use the same value as checks_read_timeout or greater.
You may also reduce the parallelism here.

> What about "plugins_timeout"? What if it takes 4 minutes to completely
> enumerate the services installed on the remote PC?

Unless your machine is real slow, increasing it is not necessary.

> Also, I am assuming this is a timeout problem.

If you are running several scans on the same slow link, it may be overloaded. 
In that case, decrease the parallelism (max_checks & max_hosts). The TCP scan 
can kill a slow link. Reduce the port range if possible (e.g. use "default" 
rather than "1-65535")
If you are using nessus_tcp_scanner, and if your machines are not firewalled, 
disable the "Firewall detection".
You can also play with the hidden option nessus_tcp_scanner.micro_timeout; try 
setting it to 300 µs (in nessusd.conf or .nessusrc...)
nessus_tcp_scanner.micro_timeout=300  

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