modem setup/config for dialin

[johny2K]

hi experts,

i am trying to configure my server to accommodate incoming (dialin) login under redhat 9. can anyone share some help on this?

is redhat9 has a device auto-detect features?

 

[RhythmAce]

I think I remember seeing a ppp server on RH 9.0. I don't use the gui so I don't know how to set it up.

 

[mrregan]

setup a line in your inittab file to run mgetty like:
modem:2345:respawn:/sbin/mgetty -s 19200 /dev/ttyS04
after you insert the line , enter "init q" to reexamine
the inittab file. man mgetty for more options

 

[johny2K]

hello there,

i checked, i don't have mgetty in my RedHat9 server instead mingetty & agetty only.

i can connect using winxp hyperterminal but couldn't see the login prompt. it just showed you, you are connected at the left-bottom of the hyperterminal.

i added up modem:2345:respawn:/sbin/agetty -s 115200 /dev/ttyS0 under /etc/inittab but still the same result. using linux xwin network device, i can query modem.

i even tried mingetty, but same result and it's for console only?

anything i missed?

 

[mrregan]

I am not familiar with agetty but man agetty shows an inittab entry more like:
modem:2345:respawn:/sbin/agetty -mt60 ttyS0 19200

you should try to connect at 8-1-N , also, you can do a ps command to make sure that agetty is even running (listening)
You are apparently using an external modem , correct?

 

[johny2K]

yes. i am using an external usrobotics modem 56k.

i tried the ff, and i can see the modem:

Internet->More Internet Applications->Kpp->

Device (folder)

Modem Device : /dev/ttyS0
Flow Control : Hardware [(CRTSCTS)]
Line Termination : CR
Connection Speed : 57600
/ Use lock File
Modem Timeout : 60 sec

Modem (folder)

Busy Wait 0
Modem Commands - OK
Query Modem - OK (i can query on modem)

anything else i missed? i put the line under /etc/inittab:
d1:12345:respawn:/sbin/agetty -mt60 38400,19200,9600,2400,1200 ttyS0 vt100

and grep show me the following:

root 866 1 0 Aug17 tty1 00:00:00 /sbin/mingetty tty1
root 867 1 0 Aug17 tty2 00:00:00 /sbin/mingetty tty2
root 868 1 0 Aug17 tty3 00:00:00 /sbin/mingetty tty3
root 869 1 0 Aug17 tty4 00:00:00 /sbin/mingetty tty4
root 870 1 0 Aug17 tty5 00:00:00 /sbin/mingetty tty5
root 871 1 0 Aug17 tty6 00:00:00 /sbin/mingetty tty6
root 11249 1 0 11:05 ttyS0 00:00:00 [login]
root 11420 10377 0 13:14 pts/0 00:00:00 grep tty

i can establish modem-to-modem communication, but no LOGIN screen.

 

[mrregan]

Your grep would indicate that agetty is not running. Did you run 'init q' to restart the inittab?. Look in /var/log to see if their is an agetty.log

 

[johny2K]

sorry - i gave you incomplete information.

here's what i got from my system:

1. under /etc/inittab

d1:12345:respawn:/sbin/agetty -mt60 38400,19200,9600,2400,1200 ttyS0 vt100
d2:12345:respawn:/sbin/agetty -mt60 38400,19200,9600,2400,1200 ttyS1 vt100

2. ps -ef | grep tty => shows these:

root 866 1 0 Aug17 tty1 00:00:00 /sbin/mingetty tty1
root 867 1 0 Aug17 tty2 00:00:00 /sbin/mingetty tty2
root 868 1 0 Aug17 tty3 00:00:00 /sbin/mingetty tty3
root 869 1 0 Aug17 tty4 00:00:00 /sbin/mingetty tty4
root 870 1 0 Aug17 tty5 00:00:00 /sbin/mingetty tty5
root 871 1 0 Aug17 tty6 00:00:00 /sbin/mingetty tty6
root 11920 1 0 Aug20 ttyS0 00:00:00 [login]
root 16009 1 0 15:47 ttyS1 00:00:00 /sbin/agetty -mt60 38400 19200 9600 2400 1200 ttyS1 vt100
root 16052 16010 0 15:47 pts/0 00:00:00 grep tty

what could possibly wrong?

 

[mrregan]

The 'ps' is showing a login process active on ttyS0. Kill this process (kill -9 11920) and retry. How old is the modem? Can you talk directly to it with 'cu' and display the modem settings?

 

[johny2K]

hello there,

i don't think i have "cu" command in my redhat linux9.

my modem is a brand new external 56k USRobotics.

 

[mrregan]

Try setting your speed to a fixed value from the pc you are dialing from, such as 19200. Are you sure the cable you are using is a modem cable? You should have cu. Type 'whereis cu'. You should be able to communicate with the device directly with command such as "cu -s 19200 -l /dev/ttyS0". Use ~. (tilde period) to end the session. What are the settings of /dev/ttyS0 -owner, group, permissions? Can you call out using the modem?

 

[sstilton]

Try this form.

Setting up PPP on Linux

Summary:

This document will show how to set up a dial in connection using PPP.

Steps to resolve:
· Install latest PPP rpm.
· Install libgr-progs rpm.
· Install latest mgetty rpm.

Server Setup:

· Step 1: add the following lines to the bottom of /etc/inittab for each modem:

Ex:

#For Modem

S1 :2345 :respawn:/sbin/mgetty -D ttyS1

#end of modem

· Step 2: Edit the /etc/mgetty+sendfax/login.config file. Uncomment the Autoppp line, this will enable it.

It looks like this:

/AutoPPP/ - a_ppp /usr/sbin/pppd auth -chap +pap login debug

· Step 3: Now edit /etc/ppp/pap-secrets, type the information under each of the following, they are like headers, it looks like this:

# Secrets for authentication using PAP
# client server secret acceptable local IP addresses
{$client_name} * {$password} *

Definitions:
Client = the account you will be logging in with.
Server = the name of the computer that does the authentication, for us this isn’t
Important, use a * this indicates “any.”
Secret = the password for the account.
Acceptable IP = this is the IP required for connection to be made.

· Step 4: edit /etc/ppp/options:

Example:

lock
-detach
modem
crtscts
proxyarp
asyncmap 0
defaultroute /dev/ttyS”X” (specify which COM port you are using).
netmask 255.0.0.0 (use the appropriate netmask)

· Step 5: create in the /etc/ppp directory a file called options.ttyS”x”. In this, place the following information:

IpofServer:IpofClient

· NOTE: When you set up your dial up connection, in the network settings, use the IP address that was just put in as the “IpofClient.”


Client Setup:

· Step 1: Using MS Dial Up Networking, create a new connection.
· Step 2: Use appropriate phone number. Enter through remaining screens, with appropriate answers.
· Step 3: At the “connect” screen, put in the user name and password that were used in step 3 of the Server Setup.
· Step 4: Select Properties.
· Step 5: Select Networking tab.
· Step 6: Select the Internet Component (TCP/IP), and choose properties.
· Step 7: Select Obtain an IP address automatically. Press O.K. until you are back at the “connect” screen. It is now ready to dial.



If you have questions let me know.

 

[brutuz]

hi sstilton,
i was wondering.. im doing the same thing and i cant make it work.. i just want to clarify something.. ive installed all the rpms needed.. if ill be adding in username and passwords " foo * bar * " (w/o the quotes) in pap-secrets do i still have to add those account as system users?
im getting this error..

Aug 30 18:40:07 devserver login[15993]: FAILED LOGIN 2 FROM (null) FOR egmanmi, Authentication failure
Aug 30 18:43:34 devserver mgetty[15994]: data dev=ttyS0, pid=15994, caller='none', conn='33600/ARQ/V34/LAPM/V42BIS', name='', cmd='/bin/login', user='foo'

assuming that i dont want to add foo as a system user? is pap-secrets sufficient?

TIA