Using serial modem: Difference between revisions
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[[Category:Networking]] | [[Category:Networking]] | ||
== Requirements == | == Requirements == | ||
Install alpine-2.1.3 or newer (see [[Installation|these]] notes if you are unsure how to do it | Install alpine-2.1.3 or newer (see [[Installation|these]] notes if you are unsure how to do it). | ||
Decide which serial port to use and connect your modem to it.<BR> | |||
In the example below, replace ttyS0 with ttyS'''X''' where '''X''' matches your com port number.<BR> | |||
''(/dev/ttyS0 is the same as COM1, ttyS1=COM2, ttyS2=COM3, ttyS3=COM4, ...)'' | |||
== Install packages == | == Install packages == | ||
Install required packages | Install required packages | ||
{{cmd|apk add ppp}} | |||
== | == Load modules == | ||
Load | Load the required modules and make sure they're automatically loaded at next reboot | ||
{{cmd|modprobe ppp_generic | |||
echo "ppp_generic" >> /etc/modules-load.d/ppp.conf}} | |||
== | == Config files == | ||
=== | === /etc/ppp/peers/serialmodem === | ||
''(The filename 'serialmodem' can be changed, but you will need to remember it when running pon/poff command)'' | |||
<pre>debug | <pre>debug | ||
/dev/ttyS0 | /dev/ttyS0 | ||
Line 39: | Line 28: | ||
asyncmap 0 | asyncmap 0 | ||
defaultroute | defaultroute | ||
lock | lock | ||
noauth | noauth | ||
user '{login_id}' | |||
connect '/usr/sbin/chat -v -f /etc/ppp/chat-serialmodem' | connect '/usr/sbin/chat -v -f /etc/ppp/chat-serialmodem' | ||
</pre> | </pre> | ||
=== /etc/ppp/chat-serialmodem === | |||
''(The filename 'chat-serialmodem' can be changed, but you will need modify the config file shown above to reflect your choice)'' | |||
<pre>ABORT 'BUSY' | <pre>ABORT 'BUSY' | ||
ABORT 'ERROR' | ABORT 'ERROR' | ||
Line 57: | Line 47: | ||
'' 'ATZ' | '' 'ATZ' | ||
OK 'ATDT{phonenumber}' | OK 'ATDT{phonenumber}' | ||
CONNECT '' | CONNECT '\d\c' | ||
Username: '{login_id}' | |||
Password: '{your_password}' | |||
</pre> | </pre> | ||
{{Note|Replace above words '''{login_id}''', '''{your_password}''' and '''{phonenumber}''' with what you received from your ISP.}} | === /etc/ppp/pap-secrets === | ||
If your pppd log reports something like this: | |||
daemon.debug pppd[5665]: rcvd [LCP ConfReq id=0xf6 <asyncmap 0xa0000> <auth pap> <magic 0xa239b2b1> <pcomp> <accomp>] | |||
''(Note the "<auth pap>" section)''<BR> | |||
you might need to use a pap-secrets file (or chap-secrets depending on what pppd reports in the logs).<BR> | |||
Your file might look something like this: | |||
<pre># client server secret IP addresses | |||
{login_id} * {your_password} * | |||
</pre> | |||
If you are using 'pap-secrets' (or 'chap-secrets') you should most likely comment out the 'Username:' and 'Password:' lines in your '/etc/ppp/chat-serialmodem' config. | |||
== Note for above example configs == | |||
{{Note|Replace above words '''{login_id}''', '''{your_password}''' and '''{phonenumber}''' with what you received from your ISP. The characters '''{''' and '''}''' should also be removed.}} | |||
{{Note|You might need to replace the''' 'Username:' '''and''' 'Password:' '''parts to reflect the words your ISP is using to ask you to enter your credentials}} | |||
{{Tip|You might need to replace "'''CONNECT '\d\c''''" with "'''CONNECT 'CLIENT''''" in your chat-serialmodem config}} | |||
References: | |||
* http://axion.physics.ubc.ca/ppp-linux.html | |||
* http://www.yolinux.com/TUTORIALS/LinuxTutorialPPP.html | |||
* https://tldp.org/HOWTO/PPP-HOWTO/options.html | |||
= Start/Stop= | = Start/Stop= | ||
== Start connection == | == Start connection == | ||
{{cmd|pon serialmodem}} | |||
== Stop connection == | == Stop connection == | ||
{{cmd|poff serialmodem}} | |||
= If something goes wrong... = | = If something goes wrong... = | ||
Check if process is running | Check if process is running | ||
{{cmd|pidof pppd}} | |||
Logfile | Logfile might give you a clue on what went wrong | ||
{{cmd|egrep "pppd{{!}}chat" /var/log/messages}} | |||
Check nic information | Check nic information | ||
{{cmd|ifconfig ppp0}} | |||
pppd | pppd has a statusinformation function that could come in handy | ||
{{cmd|pppstats}} | |||
Latest revision as of 14:58, 25 August 2023
Requirements
Install alpine-2.1.3 or newer (see these notes if you are unsure how to do it).
Decide which serial port to use and connect your modem to it.
In the example below, replace ttyS0 with ttySX where X matches your com port number.
(/dev/ttyS0 is the same as COM1, ttyS1=COM2, ttyS2=COM3, ttyS3=COM4, ...)
Install packages
Install required packages
apk add ppp
Load modules
Load the required modules and make sure they're automatically loaded at next reboot
modprobe ppp_generic echo "ppp_generic" >> /etc/modules-load.d/ppp.conf
Config files
/etc/ppp/peers/serialmodem
(The filename 'serialmodem' can be changed, but you will need to remember it when running pon/poff command)
debug /dev/ttyS0 115200 modem crtscts asyncmap 0 defaultroute lock noauth user '{login_id}' connect '/usr/sbin/chat -v -f /etc/ppp/chat-serialmodem'
/etc/ppp/chat-serialmodem
(The filename 'chat-serialmodem' can be changed, but you will need modify the config file shown above to reflect your choice)
ABORT 'BUSY' ABORT 'ERROR' ABORT 'NO ANSWER' ABORT 'NO CARRIER' ABORT 'NO DIALTONE' ABORT 'Invalid Login' ABORT 'Login incorrect' REPORT 'CONNECT' TIMEOUT '60' '' 'ATZ' OK 'ATDT{phonenumber}' CONNECT '\d\c' Username: '{login_id}' Password: '{your_password}'
/etc/ppp/pap-secrets
If your pppd log reports something like this:
daemon.debug pppd[5665]: rcvd [LCP ConfReq id=0xf6 <asyncmap 0xa0000> <auth pap> <magic 0xa239b2b1> <pcomp> <accomp>]
(Note the "<auth pap>" section)
you might need to use a pap-secrets file (or chap-secrets depending on what pppd reports in the logs).
Your file might look something like this:
# client server secret IP addresses {login_id} * {your_password} *
If you are using 'pap-secrets' (or 'chap-secrets') you should most likely comment out the 'Username:' and 'Password:' lines in your '/etc/ppp/chat-serialmodem' config.
Note for above example configs
References:
- http://axion.physics.ubc.ca/ppp-linux.html
- http://www.yolinux.com/TUTORIALS/LinuxTutorialPPP.html
- https://tldp.org/HOWTO/PPP-HOWTO/options.html
Start/Stop
Start connection
pon serialmodem
Stop connection
poff serialmodem
If something goes wrong...
Check if process is running
pidof pppd
Logfile might give you a clue on what went wrong
egrep "pppd|chat" /var/log/messages
Check nic information
ifconfig ppp0
pppd has a statusinformation function that could come in handy
pppstats