Firewalls

This help document describes the ports that CUPS uses so that firewall administrators can allow traffic used for printing.

Ports Used for Printer Sharing

Table 1 lists the ports that are used for IPP printer sharing via CUPS.

Table 1: Ports Used for IPP Printer Sharing

(Destination) Port	TCP/UDP	Direction	Description
53 (DNS)	TCP/UDP	OUT	Domain Name System lookups and service registrations.
631 (IPP/IPPS)	TCP	IN	Internet Printing Protocol requests and responses (print jobs, status monitoring, etc.)
5353 (mDNS)	UDP	IN+OUT	Multicast DNS lookups and service registrations.

Table 2 lists the ports that are used for SMB (Windows) printer sharing, typically via the Samba software.

Table 2: Ports Used for SMB Printer Sharing

(Destination) Port(s)	TCP/UDP	Direction	Description
137 (WINS)	UDP	IN+OUT	Windows Internet Naming Service (name lookup for SMB printing).
139 (SMB)	TCP	IN	Windows SMB printing.
445 (SMBDS)	TCP	IN+OUT	Windows SMB Domain Server (authenticated SMB printing).

Ports Used for Network Printers

Table 3 lists the ports for outgoing network traffic that are used for network printers.

Notes:

1. DNS and mDNS are used for all printing protocols except SMB.
2. SNMP is used to provide status and supply level information for AppSocket and LPD printers.

SMB: необходимо открыть порты для совместного использования файлов и принтеров SMB: File and printer sharing ports should be open

Обновлено: 2 февраля 2011 г. Updated: February 2, 2011

Область применения: Windows Server 2019, Windows Server 2016, Windows Server 2012 R2 и Windows Server 2012, Windows Server 2008 R2 Applies To: Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, and Windows Server 2012, Windows Server 2008 R2

Этот раздел предназначен для устранения определенной проблемы, обнаруженной анализатор соответствия рекомендациям сканированием. Сведения, приведенные в этом разделе, следует применять только к компьютерам, на которых были запущены файловые службы анализатор соответствия рекомендациям и которые столкнулись с проблемой, описанной в этом разделе. Дополнительные сведения о рекомендациях и проверках см. в разделе анализатор соответствия рекомендациям. This topic is intended to address a specific issue identified by a Best Practices Analyzer scan. You should apply the information in this topic only to computers that have had the File Services Best Practices Analyzer run against them and are experiencing the issue addressed by this topic. For more information about best practices and scans, see Best Practices Analyzer.

Операционная система Operating System

Windows Server Windows Server

Продукт или компонент Product/Feature

Файловые службы File Services

Уровень серьезности Severity

Категория Category

Проблема Issue

Порты брандмауэра, необходимые для общего доступа к файлам и принтерам, не открыты (порты 445 и 139). The firewall ports necessary for file and printer sharing are not open (ports 445 and 139).

Влияние Impact

Компьютеры не смогут получить доступ к общим папкам и другим сетевым службам на основе SMB на этом сервере. Computers will not be able to access shared folders and other Server Message Block (SMB)-based network services on this server.

Решение Resolution

Включите общий доступ к файлам и принтерам для обмена данными через брандмауэр компьютера. Enable File and Printer Sharing to communicate through the computer’s firewall.

Для выполнения этой процедуры как минимум необходимо быть участником группы Администраторы (либо аналогичной). Membership in the Administrators group, or equivalent, is the minimum required to complete this procedure.

Открытие портов брандмауэра для включения общего доступа к файлам и принтерам To open the firewall ports to enable file and printer sharing

Откройте панель управления, щелкните система и безопасность, а затем щелкните Брандмауэр Windows. Open Control Panel, click System and Security, and then click Windows Firewall.

В левой области щелкните Дополнительные параметры, а затем в дереве консоли щелкните правила для входящих подключений. In the left pane, click Advanced settings, and in the console tree, click Inbound Rules.

В разделе правила для входящих подключений выберите файлы правил и общий доступ к принтерам (сеансы с расширением NetBIOS) и общий доступ к ФАЙЛАМ и принтерам (SMB-in). Under Inbound Rules, locate the rules File and Printer Sharing (NB-Session-In) and File and Printer Sharing (SMB-In).

Щелкните правой кнопкой мыши на каждом правиле и нажмите Включить правило. For each rule, right-click the rule, and then click Enable Rule.

How to open firewall ports in Windows 10 [Step-by-step guide]

If you’re looking for a simple solution for opening firewall ports in Windows 10, you’ll find all the necessary details in this article.

Opening Firewall ports allows apps and programs to communicate with the network. So, if some of your apps and programs fail to launch, opening firewall ports is one of the first troubleshooting solutions that you can use.

How do I open a port on my firewall?

Users can manually allow a program to get access to the Internet by opening a firewall port. All you need to know is what port it uses and the protocol to make this function.

1. Go to Control Panel> System and Security > Windows Firewall.
2. Go to Advanced settings
3. Right-click Inbound Rules > select New Rule.
4. Add the port you want to open > click Next.
5. Add the TCP or UDP protocol and the port number into the next window > click Next.
6. Select Allow the connection > hit Next.
7. Select the network type > click Next.
8. Name the rule > click Finish.

These are all the necessary steps for opening a port in Windows 10. Remember that you can also use this method for blocking programs or ports.

Why should I use a Firewall on my PC?

Firewalls are targeted at protecting your network from various threats coming from outside and trying to get in or threats coming from inside trying to get out. A threat does this by blocking network-enabled ports.

Every time a program tries to communicate through this port, the firewall verifies its database rules to check if it is allowed or not. If it doesn’t know, it will ask the user and that’s why you sometimes see a prompt asking you if a certain program is allowed or not to access the Internet.

A firewall is an essential issue regarding computing and every PC must have one installed. This is the reason for which Windows has a firewall bundled and active as standard.

Windows firewall must occasionally be told to allow a program communicate with the network and this is the point where opening ports step into the picture.

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How to open ports in Windows Firewall

When dealing with certain apps and processes on your Windows 10 PC, you might run issues if you aren’t connecting properly to the internet. If you’ve come across a potential fix that involves opening a certain port in your firewall, you might be wondering what exactly that process entails. This is a problem that can arise in plenty of situations, but especially when attempting to set up a VPN. If you suspect Windows Firewall is part of your connectivity issue, here’s how to open ports.

How to open a port for incoming traffic in Windows Firewall

Windows Firewall is designed as a security measure for your PC. To put it simply, a firewall analyzes incoming and outgoing connections to determine whether or not they’re threats. If you suspect that your Windows Firewall is causing connectivity issues, you can open a port for incoming traffic. Here’s how:

1. Right-click the Start button.
2. Click Search.

Type Windows Firewall.

Click Advanced settings.

Click New Rule… in the right frame of the window.

Click Next.

Click Specific local ports.

Click Next.

Click Next.

Click Next.

Click Finish.

How to open a port for outgoing traffic in Windows Firewall

The same set of steps listed above can be used to create a rule for outgoing traffic. In step No. 6, instead of clicking Inbound Rules, you’ll want to click Outgoing Rules. The rest of the steps are the same, and you can disable the rule in the same manner by using the steps in the next section.

How to close a port in Windows Firewall

Want to disable the rule you created to open a port in the Windows Firewall? Here’s how:

Right-click the Start button.

Click Search.

Click Windows Firewall.

Click Inbound Rules or Outbound Rules in the left frame of the window, depending on what type of rule you created.

Click the name of the rule in the right frame of the window.

Click Delete if you want to completely delete the rule.

More resources

Need a bit more help with Windows Firewall and Windows 10? We have plenty of resources covering a wide range of topics.

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