Cisco RV042

[Sulaiman Ejaz]

Hi,

Dear all I need to know about cisco RV042 router. I need to know about when I used to login this router via 192.168.1.1 (its edfault getway) then which protocol it uses? TCP or telnet ? and how can I find its parameter through wireshark ?

Regards

Sulaiman Ejaz.

[Ganesh Hariharan]

Hello Sulaiman,

Telent works on port 23 with connection oriented protocol which is TCP.

A telnet client will only use TCP as the transport  protocol.  I guess you could write your own telnet client (or use  netcat) to use UDP but on a Cisco router the telnet process will not  respond unless the connection request comes in on TCP port 23. 

If you want to test, then run a wireshark on your system or laptop and telent on router ip address. You will see TCP handshake on port 23 will happen for sucessfull authentication.

Hope it Helps..

-GI

Rate if it Helpss

[Sulaiman Ejaz]

I have attached a picture. please check it. 

I have set remote management on 443 port. Now when I am accessing my router then which port and protocol am I using?

[Ganesh Hariharan]

Hello,

443 is also Transport layer port , so you are your using secure communication over port 443 ( https) with TCP protocol.

Hope that Helps..

-GI

Rate if it Helps..

[Sulaiman Ejaz]

Now can I read parameter (user name and password) by using wireshark ?

I can do this on port 23 (Telnet protocol) which is "unencrypted text communication". 

What about 443 port ?

[Ganesh Hariharan]

Yes, With port 23 as plain text communication username and password can be seen. For port 443 , you need to decrypt in Wireshark to see actual data communication. Have a look on the below link on how to decrypt 443 communication using Wireshark. https://wirewatcher.wordpress.com/2010/07/20/decrypting-ssl-traffic-with-wireshark-and-ways-to-prevent-it/ Hope it Helps. -GI Rate if it Helps..