fortigate 201F telnet server

[chendewu_520]

I use fortigate telnet server prompot: 

FortiGate-201F # execute telnet 192.168.20.15 5000
Trying 192.168.20.15...
Connected to 192.168.20.15.
Connection closed by foreign host.

ping is ok

FortiGate-201F # execute ping 192.168.20.15
PING 192.168.20.15 (192.168.20.15): 56 data bytes
64 bytes from 192.168.20.15: icmp_seq=0 ttl=64 time=0.2 ms
64 bytes from 192.168.20.15: icmp_seq=1 ttl=64 time=0.1 ms

I use my pc telnet it is ok , the port of the server is open and there is no restriction

[knagaraju]

Hello Chendewu.

I see that from FortiGate the telnet to the server is successful.

FortiGate-201F # execute telnet 192.168.20.15 5000
Trying 192.168.20.15...
Connected to 192.168.20.15.

However, there is a message Connection closed by foreign host. 
This means that the server is listening on port 5000 but closing the connection immediately.

[chendewu_520]

Connection closed by foreign host.

So this mean telnet is successful, is the server actively closing the connection?

[knagaraju · Accepted solution]

Yes, correct. The server is closing the connection.

[chendewu_520]

Ok, thank you