Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

nznznznzF5_2991's avatar
nznznznzF5_2991
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Dec 05, 2017

Allow Telnet to HTTP port when HTTP profile is applied

How can I allow telnet to http port to work on a virtual server with a HTTP profile on?  
application delivery
big-ip
Samir_Jha_52506's avatar
Samir_Jha_52506
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Dec 05, 2017

Telnet only work if you have configure VIP with work(i.e 80, 443, 8080, etc). but what you wanted to achieve with this, please explain.

    telnet

At the prompt, enter an appropriate HTTP request line and HTTP headers, pressing Enter once after each line.

For example:

    GET / HTTP/1.1 
    Host: www.xyz.com 
    Connection: close
nznznznzF5_2991's avatar
nznznznzF5_2991
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Dec 06, 2017

When I apply a basic http profile on a virtual server. The TCP handshake continues (because of tcp profile) but I couldn't get a banner then if I remove the http profile from the virtual server. I'm getting a banner.

 

We've had some issue when we turned on http profile on a virtual server for HTTP payload debugging, the ESB nodes yields network timeout despite that the packet capture indicates that they are passing a HTTP payload prior to applying the http profile.