SENA Serial_IPTM Redirector 4.3 - Manual (Page 59)

Appendix A: Advanced Settings
A.2.1 Introduction A.2.7 Configuring the Authentication Feature
A.2.2 Security Issues in Tactical Software Products A.2.8 Configuring the Certificate Feature
A.2.3 SSL/TLS Security Features A.2.9 Troubleshooting
A.2.4 What You Need to Get Started A.2.10 COM/IP AT Commands
A.2.5 Enabling SSL/TLS Security Features A.2.11 Certificate Authorities
A.2.6 Configuring the Encryption Feature
A.2.10 COM/IP AT Commands
In the COM/IP Redirector, the settings for the SSL/TLS Security features can be modified programmatically by
issuing "AT+S" commands to the COM/IP Redirector's AT command processor. For each COM port, settings
are initially those set in the Control Panel, then subject to change for each COM port via AT commands.
Changes remain in effect separately for each COM port until the software modem for that port is reset or the next
time the Windows operating system is rebooted, at which time the settings currently applied in the Control Panel
are in effect.
The AT+S command has three modes:
●
Set parameters: AT+S=<value>
●
Query current parameters: AT+S?
●
Query allowable settings: AT+S=?
As detailed later in this section, the semantics of the last mode are context-dependent.
There are six commands associated with +S:
●
Encryption Protocol: AT+SPROTO
●
Cipher Set: AT+SCS
●
Negotiated Cipher Set: AT+SNS
●
Certificate Authentication: AT+SCA
●
Certificate Presentation: AT+SCP
●
Certificate Password: AT+SCPW
None of these commands have any effect on the settings saved in the GUI. Furthermore, the next time the
COM/IP modem is reset (via ATZ, AT&F, or a reboot), the settings specified by these commands revert to the
settings specified in the Control Panel.
A.2. SSL/TLS Security