SSL Reference Manual

The value of the maximum heap to be used in bytes.

Default

The default heap size limit is set to in 367001600 (=350 MiB). See Considerations for further explanation.

Considerations

SSLOBJ regularly checks its heap usage. At the point the heap usage reaches 85% of HEAPSIZELIMIT, newly

incoming connections will be rejected until the heap usage has decreased again below 85% of HEAPSIZELIMIT.

In theory the heap could grow as large as the available main memory, however there are various limiting factors. In

particular the TCP6SAM and CIPSAM TCP/IP stacks set their QIO segment at the location around 400MiB, thereby

limiting the general heap usage to that value. In case the process reaches that value, the process will abend with a heap

exhaustion error.

In the default settings about 100MiB headroom (400MiB-350MiB*85%) for existing connections is preserved for safety

reasons.

INTERFACE

Use this parameter to specify the IP address HP NonStop SSL should use for local binding on incoming connections.

Parameter Syntax

INTERFACE ip-address

Arguments

ip-address

the IP address to bind to or “*” for none

Default

If omitted, HP NonStop SSL will use the value of “*” and bind to no specific IP address

Example

INTERFACE 10.0.0.197

INTERFACE [2001:db9::1421:51ab]

Considerations

• The parameter is relevant for the following run modes: PROXYS (incoming socket), PROXYC (incoming

socket), FTPS (control listening socket being connected to from remote FTP client), FTPC (control listening

socket being connected to from local NonStop FTP client)

• Use this parameter to control which IP address HP NonStop SSL binds to for incoming connections.

• If a host name rather than an IP address is used to configure INTERFACE, name resolution will take place only

once during startup. If name resolution fails, HP NonStop SSL will terminate during startup.

• The parameter is invalid in IPMODE DUAL since no bind address except the IPv6 ANY address '::' can handle

both IPv4 and IPv6.