telnet session closed automatically

[Rps-Cheers]

Hi everyone，

I have a problem that is telnet to router 1841.The telnet session will be disconnect after i login the device.even though i don't anything.

I have run Wireshark to capture，i can see there is a tcp RST packet from router to PC.But，i do not know the reason，please help me to resolve it .thanks

[marce1000]

 - Perhaps the router has ACL's or other access restrictions, preventing telnet from your PC.

M.

[Rps-Cheers]

No,it's not right,we can telnet to the device,but the telnet session will be closed quickly.

[Diana Karolina Rojas]

Hello!

Can you provide your line vty configurations?

Best Regards,

[Rps-Cheers]

line vty 0 4
password xxx
login

[Diana Karolina Rojas]

Hello! 

Did you try to do telnet from cmd? did the port open? you also can try to use another terminal to connect to the device. Other hand... why do your switch not have ssh enabled? is it old?

Please do not forget to rate useful post.

Best Regards,

[Rps-Cheers]

Thanks for your response! The Customer use CRT to telnet the ISR1841,he doesn't try to another PC or cmd. Our Customer just use telnet,i suggest he use ssh.He is very concerned about why Telnet has problems. In addition,if we telnet it from another Router,it's OK. We can see some logg as below: Log Buffer (4096 bytes): 13 01:28:12.522: IP: s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), len 55, sending Jun 13 01:28:12.522: TCP src=23, dst=50112, seq=4004098123, ack=2164961056, win=4065 ACK PSH Jun 13 01:28:17.217: IP: tableid=0, s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), routed via FIB Jun 13 01:28:17.217: IP: s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), len 41, sending Jun 13 01:28:17.217: TCP src=23, dst=50112, seq=4004098138, ack=2164961057, win=4064 ACK PSH Jun 13 01:28:17.585: IP: tableid=0, s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), routed via FIB Jun 13 01:28:17.585: IP: s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), len 41, sending Jun 13 01:28:17.585: TCP src=23, dst=50112, seq=4004098139, ack=2164961058, win=4063 ACK PSH Jun 13 01:28:17.705: IP: tableid=0, s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), routed via FIB Jun 13 01:28:17.705: IP: s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), len 41, sending Jun 13 01:28:17.705: TCP src=23, dst=50112, seq=4004098140, ack=2164961059, win=4062 ACK PSH Jun 13 01:28:17.913: IP: tableid=0, s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), routed via FIB Jun 13 01:28:17.913: IP: s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), len 41, sending Jun 13 01:28:17.913: TCP src=23, dst=50112, seq=4004098141, ack=2164961060, win=4061 ACK PSH Jun 13 01:28:18.017: IP: tableid=0, s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), routed via FIB Jun 13 01:28:18.017: IP: s=130.20.11.7 (local), d=130.20.1.18 (FastEthernet0/1), len 41, sending Jun 13 01:28:18.017: TCP src=23, dst=50112, seq=4004098142, ack=2164961061, win=4060 ACK PSH BR Moments