Siemens Simatic RTU303xC Series Operating Instructions Manual page 91

Table 4- 1 Server ports of the LAN interface
Protocol / function Port number (pro-
tocol)
HTTP 80 (TCP)
HTTPS 443 (TCP)
DNS 53 (UDP)
DHCP 67 / 68 (UDP)
DNP3 20000 *
(TCP/UDP)
IEC 2404 * (TCP)
HART-IP 5094 + 20004 *
(TCP/UDP)
Modbus-TCP 502 * (TCP)
* The port number can be set in WBM.
Table 4- 2 Server ports of the WAN interface
Protocol / function Port number (pro-
tocol)
HTTPS 443 (TCP)
DNP3 20000 *
(TCP/UDP)
IEC 2404 * (TCP)
Table 4- 3 Server ports in the tunnel of the VPN interface
Protocol / function Port number (pro-
tocol)
HTTP 80 (TCP)
HTTPS 443 (TCP)
DNP3 20000 *
(TCP/UDP)
IEC 2404 * (TCP)
HART-IP 5094 + 20004 *
(TCP/UDP)
Modbus-TCP 502 * (TCP)
* The port number can be set in WBM.
Ports of the PC, of communications partners and routers
Make sure that you open the required client ports in their firewalls in your configuration PC,
the communications partners of the RTU and in intermediary routers.
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Default of the port Port status
Open Open after configuration
Open Open
Open Open
Open Open after configuration
Closed Open after configuration
Closed Open after configuration
Closed Open after configuration
Closed Open after configuration
Default of the port Port status
Closed Open after configuration
Closed Open after configuration
Closed Open after configuration
Default of the port Port status
Open Open after configuration
Open Open
Closed Open after configuration
Closed Open after configuration
Closed Open after configuration
Closed Open after configuration
Configuration (WBM)
4.1 Security recommendations
Authentication
Yes
Yes
No
No
Yes, when secure
authentication is ena-
bled.
No
No
No
Authentication
Yes
Yes, when secure
authentication is ena-
bled.
No
Authentication
Yes
Yes
Yes, when secure
authentication is ena-
bled.
No
No
No
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