[Info-vax] prevent user login during and after startup

[David Froble]

Bob Gezelter wrote:

> First, I must note that I am offsite without my laptop, so I do not have access to check some things.
> 
> An approach that I have used in several similar situations is similar to what Dan has mentioned: code inserted into SYS$MANAGER:SYLOGIN.COM to check several conditions prior to allowing a login to continue.
> 
> In this case, that would work.
> 
> In any event, my recollection is that the code that actually does the startup of telnet is in SYS$STARTUP:TCPIP$STARTUP.COM. I would have to sit down with a listing (which I cannot do where I am at the moment), but it should be straightforward to suppress the starting of telnet from that point.
> 
> At a later point in the startup, when telnet use is acceptable, one can start telnet by invoking SYS$MANAGER:TCPIP$TELNET_STARTUP.COM.
> 
> - Bob Gezelter, http://www

I think Bob has the correct approach.  I found the following in 
SYS$STARTUP:TCPIP$STARTUP.COM

$         config_proc = f$edit("sys$manager:tcpip$config.com","upcase")
$         @'config_proc' dhcp_client enable
$         @'config_proc' ftp_client enable
$         @'config_proc' telnet enable

Possibly a "!" in that last line might inhibit starting TelNet services. 
  Don't know, I haven't tested this.