SCO

How can I change timers for TCP/IP sockets in SCO Unix 7.1.1

Check out the man page for "tcp". Here's a little bit of it:

The TCP_KEEPIDLE option can be used to control the start interval for TCP keep-alive messages. Normally, when enabled via SO_KEEPALIVE, keep-alives do not start until the connection has been idle for 2 hours. This option can be used to alter this interval. The option value should be specified in seconds. The minimum is restricted to 10 seconds. Setting TCP_KEEPIDLE to 0 restores the keep-alive start interval to the default value.

Normally TCP will send a keep-alive every 75 seconds once the connection has been idle for the KEEPIDLE period. Keep-alives may be sent more frequently by using the TCP_KEEPINTVL option to specify the interval in seconds. The minimum is restricted to 1 second. Setting TCP_KEEPINTVL to 0 restores the keep-alive interval to the default value.

Normally TCP will send 8 keep-alives prior to giving up. This number may be altered by using the TCP_NKEEP option to specify the desired number of keep-alives. The minimum value is constrained to be 1. Setting TCP_NKEEP to 0 restores the keep-alive interval to the default value.

Normally TCP will try to retransmit for 511 seconds before dropping a connection. This value can be changed using the TCP_MAXRXT option. Setting TCP_MAXRXT to a value between 180 and 2^32-2 causes TCP to wait that number of seconds before giving up. Setting TCP_MAXRXT to 0 restores the retransmission interval to the default value. Setting the retransmission interval to 2^32-1 (0xffffffff) causes TCP to
retransmit forever. The retransmission period cannot be set to less than three minutes (180 seconds).

Hope this helps...