Table 5 TCP filtering behavior with and without an established TCP connection
From: The role and security of firewalls in cyber-physical cloud computing
Amazon and Google | Azure (both) | |||
|---|---|---|---|---|
Connection est. | No | Yes | No | Yes |
(null) | ✗ | ✗ | ✓ | ✗ |
F | ✗ | ✗ | ✓ | ✗ |
S | ✗ | ✗ | ✗ | ✗ |
SF | ✗ | ✗ | ✓ | ✓ |
R | ✗ | ✗ | ✓ | ✗ |
RF | ✗ | ✗ | ✓ | ✗ |
RS | ✗ | ✗ | ✓ | ✓ |
RSF | ✗ | ✗ | ✓ | ✓ |
P | ✗ | ✗ | ✓ | ✗ |
PF | ✗ | ✗ | ✓ | ✗ |
PS | ✗ | ✗ | ✗ | ✗ |
PSF | ✗ | ✗ | ✓ | ✓ |
PR | ✗ | ✗ | ✓ | ✗ |
PRF | ✗ | ✗ | ✓ | ✗ |
PRS | ✗ | ✗ | ✓ | ✓ |
PRSF | ✗ | ✗ | ✓ | ✓ |
A | ✗ | ✗ | ✓ | ✗ |
AF | ✗ | ✗ | ✓ | ✗ |
AS | ✗ | ✗ | ✓ | ✗ |
ASF | ✗ | ✗ | ✓ | ✓ |
AR | ✗ | ✗ | ✓ | ✗ |
ARF | ✗ | ✗ | ✓ | ✗ |
ARS | ✗ | ✗ | ✓ | ✓ |
ARSF | ✗ | ✗ | ✓ | ✓ |
AP | ✗ | ✗ | ✓ | ✗ |
APF | ✗ | ✗ | ✓ | ✗ |
APS | ✗ | ✗ | ✓ | ✗ |
APSF | ✗ | ✗ | ✓ | ✓ |
APR | ✗ | ✗ | ✓ | ✗ |
APRF | ✗ | ✗ | ✓ | ✗ |
APRS | ✗ | ✗ | ✓ | ✓ |
APRSF | ✗ | ✗ | ✓ | ✓ |
U | ✗ | ✗ | ✓ | ✗ |
UF | ✗ | ✗ | ✓ | ✗ |
US | ✗ | ✗ | ✗ | ✗ |
USF | ✗ | ✗ | ✓ | ✓ |
UR | ✗ | ✗ | ✓ | ✗ |
URF | ✗ | ✗ | ✓ | ✗ |
URS | ✗ | ✗ | ✓ | ✓ |
URSF | ✗ | ✗ | ✓ | ✓ |
UP | ✗ | ✗ | ✓ | ✗ |
UPF | ✗ | ✗ | ✓ | ✗ |
UPS | ✗ | ✗ | ✗ | ✗ |
UPSF | ✗ | ✗ | ✓ | ✓ |
UPR | ✗ | ✗ | ✓ | ✗ |
UPRF | ✗ | ✗ | ✓ | ✗ |
UPRS | ✗ | ✗ | ✓ | ✓ |
UPRSF | ✗ | ✗ | ✓ | ✓ |
UA | ✗ | ✗ | ✓ | ✗ |
UAF | ✗ | ✗ | ✓ | ✗ |
UAS | ✗ | ✗ | ✓ | ✗ |
UASF | ✗ | ✗ | ✓ | ✓ |
UAR | ✗ | ✗ | ✓ | ✗ |
UARF | ✗ | ✗ | ✓ | ✗ |
UARS | ✗ | ✗ | ✓ | ✓ |
UARSF | ✗ | ✗ | ✓ | ✓ |
UAP | ✗ | ✗ | ✓ | ✗ |
UAPF | ✗ | ✗ | ✓ | ✗ |
UAPS | ✗ | ✗ | ✓ | ✗ |
UAPSF | ✗ | ✗ | ✓ | ✓ |
UAPR | ✗ | ✗ | ✓ | ✗ |
UAPRF | ✗ | ✗ | ✓ | ✗ |
UAPRS | ✗ | ✗ | ✓ | ✓ |
UAPRSF | ✗ | ✗ | ✓ | ✓ |