Non-RFC Compliant Telnet Traffic on Port 23

Announcements

Changes to the LIVEcommunity experience are coming soon... Here's what you need to know.

Reply
agilessk
L0 Member

Non-RFC Compliant Telnet Traffic on Port 23

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


Accepted Solutions
OtakarKlier
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

reaper
L7 Applicator

You can enable advanced packetcapture on the threat profile

That will allow you to verify what the firewall is receiving

Tom Piens - PANgurus.com
Like my answer? check out my book! amazon.com/dp/1789956374

View solution in original post


All Replies
OtakarKlier
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

agilessk
L0 Member

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. 

reaper
L7 Applicator

You can enable advanced packetcapture on the threat profile

That will allow you to verify what the firewall is receiving

Tom Piens - PANgurus.com
Like my answer? check out my book! amazon.com/dp/1789956374

View solution in original post

Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!