hello all, i am having difficulty in configuring a reverse telnet session between 2 cisco routers.
i have a Cisco 3825 router, which i will use as the aux 0 port. my settings for this port are as follows;
UK-VPN-RTR-3825-01#sh run | b line aux
line aux 0
exec-timeout 0 0
transport preferred telnet
transport input all
transport output telnet ssh
i then have a straight RJ45 network cable going from this router aux port, to the console port of the Cisco 2811 router which i would like to establish a reverse telnet session to.
as i understand it, i need to telnet to the ip address of the 1st router, and on port number 2000 + line number. i do a sh line command, the line number for the aux port is 1. so, i telnet as follows;
when i do a show line 1 on the aux router, i notice that the modem hardware state says - nocts. i believe this is not good.
please can someone help me?
thanks in advance
thanks for your help on this. I've configured a loopback interface on the router, and attempted the connection to the loopback interface on port 2001, but still no success.
I ran wireshark on my local pc, my pc sends out an initial TCP SYN packet to the loopback on port 2001, i then receive the next packet which comes from the IP address of the loopback interface, but it's a TCP RST packet, not a TCP SYN as expected.
i see this output on the router when doing a show line;
UK-VPN-RTR-3825-01#sh line 1
Tty Line Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
1 1 AUX 9600/9600 - inout - - - 0 0 0/0 -
Line 1, Location: "", Type: ""
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 9600/9600, no parity, 1 stopbits, 8 databits
Status: No Exit Banner, Modem Signals Polled
Capabilities: Hardware Flowcontrol In, Hardware Flowcontrol Out
Modem Callout, Modem RI is CD
Modem state: Idle
Modem hardware state: noCTS noDSR DTR RTS
Special Chars: Escape Hold Stop Start Disconnect Activation
^^x none - - none
Timeouts: Idle EXEC Idle Session Modem Answer Session Dispatch
never never none not set
Idle Session Disconnect Warning
Login-sequence User Response
Autoselect Initial Wait
Modem type is unknown.
Session limit is not set.
Time since activation: never
Editing is enabled.
History is enabled, history size is 20.
DNS resolution in show commands is enabled
Full user help is disabled
Allowed input transports are pad telnet rlogin lapb-ta mop udptn v120 ssh.
Allowed output transports are telnet ssh.
Preferred transport is telnet.
No output characters are padded
No special data dispatching characters
thanks in advance.