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Updated October 26th 2018
The SolarWinds server may encounter port exhaustion and become unstable.
Netstat shows data similar to the below:
UDP 0.0.0.0:65488 *:* 664
UDP 0.0.0.0:65489 *:* 664
UDP 0.0.0.0:65490 *:* 664
UDP 0.0.0.0:65491 *:* 664
UDP 0.0.0.0:65492 *:* 664
UDP 0.0.0.0:65493 *:* 664
UDP 0.0.0.0:65494 *:* 664
UDP 0.0.0.0:65495 *:* 664
UDP 0.0.0.0:65496 *:* 664
UDP 0.0.0.0:65497 *:* 664
UDP 0.0.0.0:65498 *:* 664
UDP 0.0.0.0:65499 *:* 664
UDP 0.0.0.0:65500 *:* 664
UDP 0.0.0.0:65501 *:* 664
UDP 0.0.0.0:65502 *:* 664
UDP 0.0.0.0:65503 *:* 664
UDP 0.0.0.0:65504 *:* 664
UDP 0.0.0.0:65505 *:* 664
UDP 0.0.0.0:65506 *:* 664
UDP 0.0.0.0:65507 *:* 664
UDP 0.0.0.0:65508 *:* 664
UDP 0.0.0.0:65509 *:* 664
UDP 0.0.0.0:65510 *:* 664
UDP 0.0.0.0:65511 *:* 664
UDP 0.0.0.0:65512 *:* 664
UDP 0.0.0.0:65513 *:* 664
UDP 0.0.0.0:65514 *:* 664
UDP 0.0.0.0:65515 *:* 664
UDP 0.0.0.0:65516 *:* 664
UDP 0.0.0.0:65517 *:* 664
UDP 0.0.0.0:65518 *:* 664
UDP 0.0.0.0:65519 *:* 664
UDP 0.0.0.0:65520 *:* 664
UDP 0.0.0.0:65521 *:* 664
UDP 0.0.0.0:65522 *:* 664
UDP 0.0.0.0:65523 *:* 664
UDP 0.0.0.0:65524 *:* 664
UDP 0.0.0.0:65525 *:* 664
UDP 0.0.0.0:65526 *:* 664
UDP 0.0.0.0:65527 *:* 664
UDP 0.0.0.0:65528 *:* 664
UDP 0.0.0.0:65529 *:* 664
UDP 0.0.0.0:65530 *:* 664
UDP 0.0.0.0:65531 *:* 664
UDP 0.0.0.0:65532 *:* 664
UDP 0.0.0.0:65533 *:* 664
UDP 0.0.0.0:65534 *:* 664
UDP 0.0.0.0:65535 *:* 664
In this case, port 664 refers to Lsass.exe. Local Security Authority Subsystem Service (LSASS) is a process in Microsoft Windows operating systems that is responsible for enforcing the security policy on the system. It verifies users logging on to a Windows computer or server, handles password changes, and creates access tokens.