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It was the destination port.
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Holger Scherer
Sent: Tuesday, November 23, 2021 1:38 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Port 3389 (RDP)
was 3389 the source port? Then get rid of that "security software"…
-h
------ Originalnachricht ------
Von: "Greg Wilburn" <gwilburn@xxxxxxxxxxxxxxxxxxxxxxx>
An: "Midrange Systems Technical Discussion"
<midrange-l@xxxxxxxxxxxxxxxxxx>
Gesendet: 23.11.2021 19:29:35
Betreff: Port 3389 (RDP)
Anyone know why a Power 9 system running v7r3 would use TCP port 3389 to contact a telnet device (Motorola/Zebra Radio Frequency device running 5250 telnet)?
This occurred yesterday and the security software on our firewall shut down access from that network to the IBM system.
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