Non-RFC Compliant Telnet Traffic on Port 23

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Non-RFC Compliant Telnet Traffic on Port 23

L0 Member

Can someone explain about the threat name/vulnerability Non-RFC compliant Telnet traffic on Port 23?  

2 ACCEPTED SOLUTIONS

Accepted Solutions

Cyber Elite
Cyber Elite

Hello,

So to start telnet uses port 23. What the message is saying is that it see's the packets but it doesnt conform to the RFC, i.e. the packet doesnt look like its supposed to. Could be that the application sending the traffic is not forming the packets correctly, or another application other than telnet is using that port.

 

Hope that helps.

View solution in original post

You can enable advanced packetcapture on the threat profile

That will allow you to verify what the firewall is receiving

Tom Piens
PANgurus

View solution in original post

3 REPLIES 3

Cyber Elite
Cyber Elite

Hello,

So to start telnet uses port 23. What the message is saying is that it see's the packets but it doesnt conform to the RFC, i.e. the packet doesnt look like its supposed to. Could be that the application sending the traffic is not forming the packets correctly, or another application other than telnet is using that port.

 

Hope that helps.

Thanks for the response. how to investigate that the application sending the traffic is not forming the packets correctly or non-rfc compliant? any examples or references. Thanks again. 

You can enable advanced packetcapture on the threat profile

That will allow you to verify what the firewall is receiving

Tom Piens
PANgurus
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