The Netstat utility can be used to view current connections and Ports. The Firewall may need to be re-configured to allow TCP/IP or UDP connections from the GFI LanGuard machine on the following ports. You can change the default port(s), mentioned below, for agent communication.
Feb 19, 2016 · udp for netlogon and netbios; TCP 139 for ; Opening above ports in Firewall between client computers and domain controllers, or between domain controllers, will enable Active Directory to function properly. "Please check the below link for more details. Mar 30, 2020 · It means that SMB ports firewall runs with NetBIOS over IP/TCP. NetBIOS refers to Network Basic Input Output System. This software protocol enables desktops, applications, and PCs on a LAN (Local Area Network) to interact with one another or network hardware. Nov 02, 2017 · Port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of port numbers are specified in RFC 1700. In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network. From another TechNet article, NetBIOS implementation over TCP/IP?: The Windows 2000 implementation of NetBIOS over TCP/IP is referred to as NetBT. NetBT uses the following TCP and UDP ports: UDP port 137 (name services) UDP port 138 (datagram services) TCP port 139 (session services) NetBIOS over TCP/IP is specified by RFC 1001 and RFC 1002. This is a list of TCP and UDP port numbers used by protocols of the Internet protocol suite for operation of network applications.. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic.
The firewall on the SQL server is very restrictive. 1433 is open to my web server, but I'm getting conflicting information from the web on what additional ports (TCP/UDP) are needed for NTLM to succeed. It is currently fail; I can talk on 1433 to request NTLM, but the actual authentication always fails.
Apr 29, 2020 · NetBIOS ports - This uses TCP/UDP port 137, TCP port 139, and TCP port 445. These ports are used when installing clients/agents via Remote Install and when clients/agents send quarantined files to the server using the UNC path. CIFS uses UDP ports 137 and 138, and TCP ports 139 and 445. Your storage system sends and receives data on these ports while providing CIFS service. If it is a member of an Active Directory domain, your storage system must also make outbound connections destined for DNS and Kerberos.
The original design of NetBIOS was actually for a LAN of about 70 users. One of the major misconception about NetBIOS is the fact that people think that it has to be there in order for you to have a file share to serve files to your network users. That is actually not the case. File sharing on your LAN. NetBIOS uses these ports:
I have a fortigate 90D. It is set to block netbios broadcast traffic, but it all gets logged, thousands per day. I have read conflicting opinions on disabling Netbios across the network, some say to rid of it, some say to keep it for legacy support and for network browsing. I can disable this on my Active Direcoty netowrk using DHCP option 001. Jan 08, 2016 · Ports used Kerberos is primarily a UDP protocol, although it falls back to TCP for large Kerberos tickets. This may require special configuration on firewalls to allow the UDP response from the Kerberos server (KDC). Kerberos clients need to send UDP and TCP packets on port 88 and receive replies from the Kerberos servers.