For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

PidduckM's avatar
PidduckM
Icon for Nimbostratus rankNimbostratus
Mar 26, 2025
Solved

LTM VS padding payload response with whitespaces and asterisk

I have an application that talks to an old OpenVMS system, which was problematic in permanently closing TCP connections. To resolve this issue, I have put a BIG-IP Virtual Server in between them, so ...
LTM
virtual server
xml
  • PidduckM's avatar
    PidduckM
    Mar 31, 2025

    Hi zamroni777

    Thanks for your reply.

    My post took a few days to publish, and I was trying to find a way to delete my post.

    A Developer informed me of this issue (padding with many whitespaces and one asterisk ), and I could see the behaviour in the TCPdump. However, when doing a TCPdump on the OpenVMS server and bypassing BIG-IP, I saw the same behaviour, so BIG-IP is not adding this asterisk; it's always been there. I compared the traces, and they were the same, so I was misinformed by the Developer.

    Thanks for taking the time to respond.

     

zamroni777's avatar
zamroni777
Icon for MVP rankMVP
Mar 31, 2025

do you have http profile assigned into the vserver?

and change decoding to HTTP in tcpdump so we can see the http headers and payload.

PidduckM's avatar
PidduckM
Icon for Nimbostratus rankNimbostratus
Mar 31, 2025

Hi zamroni777

Thanks for your reply.

My post took a few days to publish, and I was trying to find a way to delete my post.

A Developer informed me of this issue (padding with many whitespaces and one asterisk ), and I could see the behaviour in the TCPdump. However, when doing a TCPdump on the OpenVMS server and bypassing BIG-IP, I saw the same behaviour, so BIG-IP is not adding this asterisk; it's always been there. I compared the traces, and they were the same, so I was misinformed by the Developer.

Thanks for taking the time to respond.