And how do I close the port? If you are on Windows-based network that is running NetBios, it is perfectly normal to have port 139 open in order to facilitate that protocol.

Apr 07, 2012 Help with port 135 - IT Security - Spiceworks Apr 07, 2017 How to close ports 135 and 445 (Windows 7)? | Wilders Nov 08, 2011 Close a port - Microsoft® Community

Port 135 OPEN! (Remote Procedure Call) This impossible-to-close port appears in most Windows systems. Since many insecure Microsoft services use this port, it should never be left "open" to the outside world. This port has been exploited to send "Messenger …

Aug 31, 2009 Close Port 135? Safely Disable RPC? | Wilders Security Forums Jul 16, 2018

According to nmap, the following ports are open on my computer: 135/tcp open msrpc 139/tcp open netbios-ssn My understanding is the msrpc is the server that formerly was vulnerable to the msblast worm, so I'd like to disable it.

Click on the "OK" button to add a filter that shields the TCP 135 (RPC) port from being connected to your computer via port 135. When you click OK to go back to the Filter List dialog box, you can see that you have added a policy, repeat the steps to continue adding TCP 137, 139, 445, 593 ports, and UDP 135, 139, 445 ports, and set up the Hi, To close ports 137, 138, 139 write this command in the command prompt sc config netbt start= disabled-----To close port 445: Start Registry Editor (Regedit.exe). The RPC Endpoint Mapper (port 135) is definitely not required by RDP, and it is perfectly reasonable (and suggested) to block it on a firewall so non local hosts cannot attempt to enumerate and exploit services. I only say this with certainty because I have many hosts configured like this, and actually just tested it to make sure I wasn't crazy ;-) Mar 01, 2018 · I use port query from an external subnet and can hit port 135 on a DC in my local network but not on this server. DFS replication is failing because of RPC issues and I've narrowed it down that I'm knocking on this servers door but nobody is answering. besides testing with port query telnet fails also. Oct 24, 2019 · The Remote Procedure Call Service in Windows runs on Port 135. By default this port is reported as 'Open' when I portscan the system in question. Is there a way to block this port, despite the fact it supports the Remote Procedure Call essential service? Instead of using multiple rules, I would use 1 block rule using port sets and then place it to the top. You can do is go to my port sets in common section of firewall, click add new port set, give it a name like microsoft ports, then with the new port set highlighted, add new port, select a port range, put 135 in the first box and 139 in the other, click apply and add another new port, use a