[Ser2net-devel] Port already in use by another process

[Doug S. <dou...@co...>]

Hi Folks,
I can't seem to establish the telnet session.  The laptop running Centos 6.4 has the usb cable connected to a Digi Edgeport /2i RS-422/485 USB Converter.
The telnet  error message is "Port already in use by another process".
However from what I can tell the port ser2net is listening on (30006)is not being used by anything else.
I tried many other ports with no luck.
Below are the steps I took so far.  Any ideas?

[cmstest@cmscore-ivv-test ~]$ cat /etc/redhat-release
CentOS release 6.4 (Final)

[cmstest@cmscore-ivv-test ~]$ netstat -aln | grep :30006

[cmstest@cmscore-ivv-test ~]$ dmesg | grep tty
console [tty0] enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
usb 2-2: Edgeport TI 2 port adapter converter now attached to ttyUSB0
usb 2-2: Edgeport TI 2 port adapter converter now attached to ttyUSB1

[cmstest@cmscore-ivv-test ~]$ ser2net -C 30006:telnet:600:/dev/ttyUSB0:9600,8DATABITS,NONE,1STOPBIT

[cmstest@cmscore-ivv-test ~]$ netstat -aln | grep :30006
tcp        0      0 0.0.0.0:30006               0.0.0.0:*                   LISTEN

[cmstest@cmscore-ivv-test ~]$ ifconfig eth0 | grep "inet addr"
          inet addr:10.0.217.12  Bcast:10.0.217.255  Mask:255.255.255.0

[cmstest@cmscore-ivv-test ~]$ telnet 10.0.217.12 30006
Trying 10.0.217.12...
Connected to 10.0.217.12.
Escape character is '^]'.
Port already in use by another process
Connection closed by foreign host.

[cmstest@cmscore-ivv-test ~]$ netstat -aln | grep :30006
tcp        0      0 0.0.0.0:30006               0.0.0.0:*                   LISTEN
tcp        0      0 10.0.217.12:30006           10.0.217.12:58288           TIME_WAIT