Minicom Advanced Systems CMG-DCM manual Ppp

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Operator's guide

To remove a user account, choose their username from the drop-down box below Existing accounts and click Delete user. If you delete your own account, you will no longer be able to log in to the DCM, although you may finish what you are doing in the current session.

You can also change the password for any account, for example if you believe it to have been compromised, or if you are assigning it to a new person. To do this, choose their username from the same drop-down box and repeat the new password in the two boxes at the bottom of the page. Again, the password will not be visible on screen. Click Change password to make the change.

PPP

This submenu allows you to alter the PPP configuration files, /etc/ppp/options and /etc/ppp/chap-secrets. These two files are required by the Linux PPP server, and affect all ppp services on the DCM.

(Separate options for each port may be specified under Serial port

configuration; see Section 4.3, “Serial port configuration”).The /etc/ppp/chap-secretsfile is only necessary if you are using CHAP to authenticate PPP connections.

Clicking on either of these entries brings up a page in the work area which enables you to edit the file and its attributes directly, including

•

•

•

the ownership of the file;

the permissions (read, write, or execute) of the file for its own user, its own group, and all others; and

the content of the file.

The Web interface does not check that the content of the files will be

understood. You should ensure that the file is valid before committing any changes, referring to the Linux manual page for pppd(8) if you are unsure.

When you have finished editing a file, clicking Save changes will write the changes to disk. The changes will not take effect, however, until the PPP services are restarted. You can restart all running PPP services by clicking Restart PPP; whilst this occurs, the network will be briefly unavailable.

options

The file /etc/ppp/options sets the default options for the PPP daemon. These will be applied to all PPP connections and to any of the serial ports which are running the ppp service. The file is treated as a list of words, each either an

option or an argument to a previous option. For a list of the available options, and a full explanation of the format of the /etc/ppp/options file, see the Linux manual page for pppd(8).

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Contents CMG-DCM Table of Contents December Inside the DCM Introduction CMG-DCM Inside the DCM Network services Serial port servicesSee .4, Connecting to a local network for full details Overview Installing the CMG-DCMPower supply Connecting over a serial link Connecting to a single computer192.168.0.x Connecting over EthernetConnecting over USB Using an internal modemConnecting to a local network Gcfgdbset option-namenew-value Connecting to the Internet Wi-FiSetting up the CMG-DCM Connecting digitizers and external hardwareWeb setup Setting up digitizers Using Scream DCM as a data store UsageGeneral notes Gnblocks port-number Page CMG-DCM DCM as a GCF data source Accessing the DCM command line through gcfout Sensor arrays DCM as a network data hub Communicating with digitizers Configuring digitizers Data storage and retrieval Using miniSEED format Real-time data transmission CD1.0 and CD1.1 Troubleshooting DCM installations Cannot Gcfping the DCMs Scream! server Cannot see the DCMs Web site over Http or HttpsCannot connect to the DCMs Scream! server DCM is not receiving any data streams Can Gcfping the DCMs Scream! server, but no data appearsDCM is receiving streams, but they do not contain any data Use the Serial port configuration → port name Web page, or143032 up 34 min, load average 1.24, 1.32 General Configuration optionsDisk CMG-DCM Serial port configuration CMG-DCM Page Ethernet port Network configurationStatic routes DNS setup Incoming mail setup Outgoing mail setup Remote access Administrators PPP Mgetty Scream Data transferAutoDRM Scream! ClientCD1.0 Http serverHttp client CD1.1 CD1.1 subframe configuration DSS Server configuration Seed Page CMG-DCM Data Viewer ActionsStream list Icon barDigitizer Setup General digitizer settings Digitizer output control CMG-DCM Trigger criteria CMG-DCM Tap # Rate Bandwidth Samples/s Auxiliary Mux channels Sensor mass control Partition, and format disk Disk toolsCheck disk filesystem Flush flashRecent Log Entries Disk filesCamera Summary Network configurationData Out Port, Serial Port A, Serial Port B DNS configurationDisk Status Flash StatusTamper lines Software Versions Inside the DCM File systems CMG-DCM Command line tools Configuration Digitizer console access Data flow MonitoringDigitizer status Tamper lines Over the Internet Updating the DCMFrom the hard disk Removing support packagesFirmware Libgconfigdb Appendix A.1 Modular DCM units Appendix a Connector pinoutsPort a and B Data OUT portNetwork connector USB connectorDM/AM module output Appendix A.2 Integrated DCM unitsAppendix B.1 Sensor response codes Appendix B Sensor and digitizer typesDigitizer Appendix B.2 Digitizer type codes
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