Port 137; Port 139; Higher ports that are published by Port 135's "catalog" Then I heard that Port 145 came into the mix to "make things better" with NBT/TCP but I'm not sure how this fits in with the sequence of a Windows client initiating an RPC action.

As we can see from the example the TCP 445 is open and listening mode which means this system will accept connections to the 445 port. SMB Over Netbios. Actually Netbios protocol works in TCP 139 and UDP 137 and UDP 138. So if we have a secure network that prevents access to the remote hosts we should add firewall allow TCP and UDP 137-139 rule. Blocking Outgoing - Port 137 - Malwarebytes for Windows Jul 08, 2013 Port 139 (tcp/udp) :: SpeedGuide NetBIOS is a protocol used for File and Print Sharing under all current versions of Windows. While this in itself is not a problem, the way that the protocol is implemented can be. There are a number of vulnerabilities associated with leaving this port open. NetBios services: NETBIOS Name Service (TCP/UDP: 137) NETBIOS Datagram Service (TCP/UDP

By default, the HTTP port that's used for client-to-site system communication is port 80, and the default HTTPS port is 443. Ports for client-to-site system communication over HTTP or HTTPS can be changed during setup or in the site properties for your Configuration Manager site.

Sep 26, 2019 · Port 137-139 is for Windows Printer and File Sharing but also creates a security risk if unblocked. But if you share a printer on your network you will have to allow this one but I recommend just go to the pc the printer is hooked up to and use. Port 135 is for RPC service on a remote machine. Jan 24, 2016 · Red Hat Enterprise Linux depends on access to many TCP and UDP ports to function. RHEL also includes numerous software programs that require access to these communication ports. Below, you’ll find comprehensive lists of the most common TCP and UDP ports used in RHEL. For an up-to-date complete list of TCP and UDP ports registered …

In Windows 2000, Microsoft has created a new transport for SMB over TCP and UDP on port 445. This replaces the older implementation that was over ports 137, 138, 139. Your Pix should be by default be blocking these inbound. If you block these outbound as well, you will loose browsing capabilities to networks past the internat network.

Port 137 (tcp/udp) - Online TCP UDP port finder - adminsub.net Mar 30, 2016 Preventing SMB traffic from lateral connections and Mar 10, 2020 Use of ports 137, 138 and 139