Configuring tty for incoming connections

j4ck

j4ck

I have a serial port on my server which I want to connect to. But when I try to connect to this port via console cable, I can not see any outputs on the screen but I can hit any keys as inputs. The related device is /dev/ttyu2.
Here's my relevant part of my /etc/ttys file:
Code: 
console	none				unknown	off secure
#
ttyv0	"/usr/libexec/getty Pc"		cons25	on  secure
# Virtual terminals
ttyv1	"/usr/libexec/getty Pc"		cons25	on  secure
ttyv2	"/usr/libexec/getty Pc"		cons25	on  secure
ttyv3	"/usr/libexec/getty Pc"		cons25	on  secure
ttyv4	"/usr/libexec/getty Pc"		cons25	off  secure
ttyv5	"/usr/libexec/getty Pc"		cons25	off  secure
ttyv6	"/usr/libexec/getty Pc"		cons25	off  secure
ttyv7	"/usr/libexec/getty Pc"		cons25	off  secure
ttyv8	"/usr/local/bin/xdm -nodaemon"	xterm	off secure
# Serial terminals
# The 'dialup' keyword identifies dialin lines to login, fingerd etc.
ttyu0	"/usr/libexec/getty std.115200"	vt100	on  secure
ttyu1	"/usr/libexec/getty std.115200"	vt100	on  secure
ttyu2	"/usr/libexec/getty std.9600"	vt100	on secure
ttyu3	"/usr/libexec/getty std.9600"	vt100	on secure
# Dumb console
dcons	"/usr/libexec/getty std.9600"	vt100	off secure
Sorry for my poor English.
 
SirDice said:
Have you read Handbook: Chapter 26. Serial Communications?
Click to expand...

I've just read it but it's a bit confusing. And since it's urgent and I'm in a hurry, I can not read all of that. Could you guys please help me with this particular issue? It makes me sick, all settings seem to be right but I can not see any prompts. I can use the original factory console port to establish the connection but this port makes me sad.
 
What exactly are you trying to do? Create an extra serial console port?
 
SirDice said:
What exactly are you trying to do? Create an extra serial console port?
Click to expand...
Yes, and I'm trying to connect to this serial port via console cable. According to Handbook: Chapter 26. Serial Communications, there's no need to change /etc/gettytab in case of locked-speed connection (section number 26.4.4.1.1). So I don't change /etc/gettytab, and you've seen my /etc/ttys file above, but I can not see anything on the screen.
 
It's not clear if you want one serial console or if you're trying to make a second one. I'm not sure but I think there can only be one serial console at a time.
 
Is a "console cable" a general-purpose null-modem cable, or something special meant to be used with some brand-name network hardware? The second type may not work.
 
SirDice said:
It's not clear if you want one serial console or if you're trying to make a second one. I'm not sure but I think there can only be one serial console at a time.
Click to expand...
I want to have two serial ports on my system. There's no problems with the original one but the second port which I myself connected to my system has this problem.
wblock@ said:
Is a "console cable" a general-purpose null-modem cable, or something special meant to be used with some brand-name network hardware? The second type may not work.
Click to expand...
Yes, It's a general-purpose cable.
 
I got it working. I replaced ttyu2 with cuau2 in /etc/ttys and now it works fine.

Code: 
ttyu0   "/usr/libexec/getty std.115200" vt100   on  secure
ttyu1   "/usr/libexec/getty std.115200" vt100   on secure
cuau2   "/usr/libexec/getty std.115200" cons25  on secure
ttyu3   "/usr/libexec/getty std.115200" dialup   off secure
As far as I know, /dev/cua[a-z][0-9] is used for dial-out devices and /dev/tty[a-z][0-9] for dial-in devices. Considering this, is this change I've made correct or not?
 
You mean an idle-timeout? I.e. it logs you off automatically when you do nothing for a while?

That's set on the shell you are using. For (t)csh it's set using autologout, for Bourne shells it's the variable TMOUT.
 
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