3rd that. Outgoing telnet should be selecting a random port greater than 1023. 3389 is valid.
On Tue, 2021-11-23 at 14:05 -0500, Larry "DrFranken" Bolhuis wrote:
Totally agree. 3389 is not a well known port and is completely valid for
a source port number.
On 11/23/2021 1:37 PM, Holger Scherer wrote:
was 3389 the source port? Then get rid of that "security software"…
------ Originalnachricht ------
Von: "Greg Wilburn" <gwilburn@xxxxxxxxxxxxxxxxxxxxxxx<mailto:gwilburn@xxxxxxxxxxxxxxxxxxxxxxx>>
An: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxxxxxxxx<mailto: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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