Lets begin. One of them in particular is "Packet Trace". Your email address will not be published. This is useful when you need specific systems, such as servers, to use a specific IP address when they initiate traffic to other destinations. This server can be the same one that is normally used for email in your. FIREWALL. Configure UDP Timeout for SIP Connections Log into the SonicWALL. Let me make sure I understand you correctly. On this page, the SonicWall will display which interface is the Primary WAN Ethernet Interface, and which interfaces are Alternate WANs. Firewalls have been a first line of defense in network security for over 25 years. Select, You can test the One-to-One mapping by opening up a Web browser on the server and accessing the public Website. Click the Add a new Address object button and create two Address Objects for the Server's Public IP and the Server's Private IP. Enter POP3 server (name or IP Address) and Username/Password. Follow the steps: Open Windows Defender Firewall Go to Advanced settings Select Inbound rules Create a New rule. Go to section called "WAN to LAN access rules". Kindly assist. Click Manage in the top navigation menu. The port 445 for SMB should be accessible from your network to Azure via the Site to Site VPN. Ensure the network settings on your device are enabled. Dynamic NAT with mapped IP is "interface". Add Access Rules - WAN to LAN. You need to create a rule to allow smtp trafic through the WAN and redirect it to an IP on the LAN. Sonicwall specify ipv4 dns servers manually. A security ecosystem to harness the power of the cloud, Protect Federal Agencies and Networks with scalable, purpose-built cybersecurity solutions, Access to deal registration, MDF, sales and marketing tools, training and more, Find answers to your questions by searching across our knowledge base, community, technical documentation and video tutorials, 03/26/2020 15 People found this article helpful 182,236 Views. 1500 Threshold above which size limits are enforced on Regex Automaton. i have done the same connection from out side our network with no problems. This scenario is tricky; because all the Incoming SMTP traffic is to be forwarded to Email Security device and Outgoing SMTP traffic directly through the SonicWall device. Next, select Network > NAT Policies and click on the Add button to display the Add NAT Policy window. Microsoft Endpoint Configuration Manager is #1 ranked solution in top Configuration Management tools, #1 ranked solution in top Patch Management tools, and #2 ranked solution in top Server Monitoring tools.PeerSpot users give Microsoft Endpoint Configuration Manager an average rating of 8.2 out of 10.Microsoft recently made a hotfix available that patches WSUS on Windows Server 2012 and 2012. injected into otherwise benign and trusted websites. Your preferences will apply to this website only. On the left side of the Account Settings box, click the "Outgoing Server (SMTP)" header. Deployment Steps: Step 1: Creating the necessary Address Objects Step 2: Creating an Inbound NAT policy to forward SMTP traffic to the Email security device. For example, to turn ON SMTP Authentication in Mozilla Thunderbird, Open Thunderbird, go to Tools -> Account Settings -> Outgoing Server (SMTP) Select the outgoing server by clicking on it, then click the Edit button. Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. This could be because of one of the network devices (e.g, firewalls, NAT, Routers, etc) between your computer and the remote server is not configured to allow the VPN . Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Your email address will not be published. A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. If you enable the "Low priority attack" PING will get block. Once you have finished, click on the priority arrows to move the rules up and down the priority list. Click the Add button under the Address Objects table. What sonic os are you using? Login to the SonicWall Management interface. If the check box is selected, any FTP data connection through the security appliance must come from port 20 or the connection is dropped. Already a Member? Select the zone to assign to the Address Object from the Zone Assignment menu. 3000 Maximum allowed size for Regex Automaton. i am trying to enable the ability to use the command line utility "telnet" to connect to outside SMTP servers for testing purposes. For this, is the traffic coming to the Sonicwall or getting out of the Sonicwall to an external server? The interface and address of the dynamic NAT matches the firewall rule, so FortiConverter inserts the IP pool into policy 10001. This is useful when you need specific systems, such as servers, to use a specific IP address when they initiate traffic to other destinations. Step 1: Creating Address Objects1. Enter a name for the Network Object in the Name field. www.yahoo.com. Sure, the SonicWALL has that capability natively. My Sonicwall has all outgoing services allowed, which it seems should work since the Roku originates the connection. In the action settings, select allow. In the action setting, select deny. Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are. (1) WAN IP for outbound traffic (the IP of the WAN interface), LAN is a single IP on the native VLAN, no routing to other subnets or VLAN configurations. $ openssl s_client -connect smtp.poftut.com:25 -starttls smtp Connect HTTPS Site Disabling SSL2. When using Outlook (MAPI) or OWA, the Exchange Store . Firewall blocking outbound SMTP. Bit of a Sophos newb and I'm stuck on something that should be simple. Configure the General settings of the rule as shown below. This will be our deny all rule, it will deny all SMTP port 25 traffic originating from the LAN subnet and destined for the WAN. Required fields are marked *. To test whether you configured the rules correctly, connect to an E-mail server and from a command prompt, type: The result should be a 220 message. Windows command prompt window should appear. This is a very nice tool that sniffs packets and can give clues as to what is wrong. How do I configure to allow ICMP traffic to ping external IP and get a png echo request at the PC. set poolname "ippool-172.31.242.69". On the Run window, enter cmd and click OK ( Ctrl+Shift+Enter to run it as administrator). Access rules are network management tools that allow you to define inbound and outbound access policy, configure user authentication, and enable remote management of the SonicWall security appliance. Rest of the people need not do user authentication and still able access pop and smtp services (using outlook), get/give support through anydesk, teamviewer etc. Click OK. Then, create another object in the Add Address Object window for the servers public IP address and with the correct values, and select WAN from Zone Assignment menu. As you already find out, OpenVPN is commonly used in such case, because it is very NAT-friendly, and it is also supported by pfSense. Your Exchange server will not be able to relay mail to domains that use RBLs to trust other E-mail servers. Note: You need the NAT policy for allowing all people from the internet to access one private IP. The System Messages section displays text about recent events and important system messages, such as system setting changes. XSS attacks occur when an attacker. We can use s_client to test SMTP protocol and port and then upgrade to TLS connection. Linux Press Ctrl+Alt+T keys together. Select SMTP as the service and Any as the source and destinations. SMTP clients generally generate the Message-ID. Here's how to access the system console in either Windows, Linux, and macOS: Windows Press Windows+R keys together. How to manage Sonicwall CLI with SSH http://www.youtube.com/watch?v=Oq4jjfN_SkM let me know I'll check that out. Click on the add button to create a new rule. To determine which Gateway to send SMTP traffic through, you must determine which interface is the Primary WAN. You are inside your network (behind the sonicwall on the LAN) and you are trying to telnet on port 25 to an Outside IP/dns address on another mail server on the internet? Login to the SonicWall Management interface. Tried rebooting PC and modem. Choose Host from the Type menu, enter the servers private IP address in the IP Address field, and select the zone that the server assigned from the Zone Assignment menu. If we were to reverse rules # 1 and 4 in the example above, the firewall would look at rule # 1, see that ANY (all hosts) is prevented from relaying and drop the packet. The reason anti-spam failed to detect mail server is because of SMTP (Send E-Mail) service object is present in a service group and its used under NAT policies or access rules. Close this window and log in. Sonicwall Firewall - Allow only "Basic Web Access". They can change outgoing ports. Step 1: Creating Address Objects 1. The message could not be sent because connecting to Outgoing server (SMTP) smtp.office365.com failed. next. The only guide I see is to open inbound ports not outbound. Sonicwall issues with OUTBOUND UDP on default configuration Hello, I have a basic network setup, default Sonicwall (new) out of the box. 6. 122.54.214.202 is our current internet gateway and smtp 122.54.214.203 (created public ip) In the navigation pane, click Outbound Rules. 3. 5. When done, click on the OK button to create the range object. By default ping from LAN to WAN is allowed on Sonicwall. Navigate to the Network | Address Objects page. Select the Advanced tab for the rule and set the UDP timeout to 300 seconds. Select SMTP as the service, your SMTP server as the source and any as the destination. I have checked thru the firewall policy and cannot find any problem that the ICMP traffic has no reply echo. The Access Rules in SonicOS are management tools that allows you to define incoming and outgoing access policies with user authentication and enabling remote management of the firewall. Ensure that you have completed the tele-verification process. Outbound NAT through SonicWall I have a server with a private IP address 10.1.1.49. Windows Firewall. ave same issue and have do exactly as instructed above but cannot ping outside public ip address such as 8.8.8.8. Click Advanced Settings on the left. So once i disabled the realtime protection, i was able to do SMTP stuff. Enforce Host Tag Search for CFS [Reset AV Info] although i am not 100% sure it is the sonicwall that is blocking me but i am unsure what else would be. uses a web application to send malicious code, generally in the form of a browser side script, to a different end-user. SonicWALL Application Firewall provides granular, application level access control across multiple protocols, including HTTP, FTP, SMTP, and POP3. I have previously used Watchguard fireboxes. To configure SMTP Authentication for Outbound, follow these steps: Navigate to Manage > Network > Server Configuration page. The premise is simple: create a firewall rule that allows the local Exchange server to relay SMTP packets while preventing other hosts in your LAN from doing the same. Add Outbound NAT. Choose Port rule Select TCP Specify the local ports: Enter "25" into the textbox Enable "Allow the connection" Tick the Domain, Private, Public checkboxes Give name to this rule Click Finish Your browser does not support the video tag. To create a free MySonicWall account click "Register". When i try something like, c:\> telnet mail.host.com 25, i immediatly get a message saying it cannot connect. I've tried adding a rule a the top with all the emails down as . Please let us know here why this post is inappropriate. Select Network > Address Objects and click on the Add button at the bottom of the screen. To create a NAT policy to allow the Web server to initiate traffic to the public Internet using its mapped public IP address, choose the following from the drop-down menus: When done, click on the OK button to add and activate the NAT Policy. Type the IP address or the FQDN of the Simple Mail Transfer Protocol (SMTP) server into the SMTP Server field. Log into the SonicWall GUI. I've got an internal printer doing scan to email through office 365. Go to section called "add outbound NAT". I need to allow outbound traffic for port 445 in Dell SonicWall firewall to attach a Microsoft Azure remote share. Search for Windows Firewall, and click to open it. I have no problem reaching the yahoo website or other websites. The ICMP traffic is blocked in sonicwall to external IP. For example, if your ISP is Comcast you can generally use smtp.comcast.net with the appropriate settings. Please check your IPS settings. To prevent LAN users from sending outbound SMTP, select from LAN to WAN. The rules that allows your mail hosts to relay should be first followed by the ANY>ANY>Deny rule. Click the Add button under the Address Objects table 4. Click OK to add the Address Object to the SonicWall's Address Object Table. It would look no further and thus not notice that further down there is a rule to allow EX02 to relay. Ensure your Android or iOS mobile phone is updated with the latest device software. Go to System > Packet Monitor then configure with the following: Monitor Filter tab: Ether Type <IP>, IP Type <TCP>, Destination Port <22> Check the box for Bidirectional Address and Port Matching After that, click OK and then Start Capture. By submitting this form, you agree to our Terms of Use and acknowledge our Privacy Statement. Sep 3rd, 2013 at 7:14 PM. On my SonicWall TZ-210 I have inbound and outbound NAT rules so that the server is accessible to the public at 173.1.1.49 and should be seen by the public as 173.1.1.49. rgds Category: Entry Level Firewalls Reply CORRECT ANSWER shiprasahu93 Moderator Hello @Lucas, You can perform a packet capture on the SonicWall to see why the ping packets are being dropped. When configuring your edge firewall, blocking outbound port 25 should be modus operandi. After adding the Access rules to the SonicWall, the Access rules page will be looking like the screenshot attached below: Click the Arrows icon in the Priority column, the Change Priority window is displayed. 6. The server may be unavailable or is refusing SMTP. Copyright 2022 SonicWall. One-to-One NAT for outbound traffic is another common NAT policy on a SonicWall security appliance for translating an internal IP address into a unique IP address. This in turn, will save your company from a possible RBL listing (Real Time Block List). 3. In the action setting, select deny. OOPS!! To get around this problem, typically your ISP will have an Outgoing email server you can use. SSLVPN Timeout not working - NetBios keeps session open, Configuring a Virtual Access Point (VAP) Profile for Internal Wireless Corporate Users, How to hide SSID of Access Points Managed by firewall. To create the firewall rules, open your Sonicwall management interface and navigate to firewall, then access rules. Use caution when creating, deleting or prioritizing network access rules. nissan gtr r34 skyline; instrumental covers of popular songs download coty wamp husband coty wamp husband. Now try the same command from another host and you should get a connection refused message. Enter a name for the Network Object in the Name field. I also cannot send a message and get the error, "connecting to Outgoing server (SMTP) smtp.centurylink.net failed. How do I configure to allow ICMP traffic to ping external IP and get a png echo request at the PC. Note: Although you can create rules by selecting Program or Port, those choices limit the number of pages presented by the wizard. In the example below, we have rules # 1-3 which specifically allows the Exchange server (EX02) and two other servers to relay. Select Host for a single computer and mention the IP address of the SMTP server. You need to make sure that the allow rules precede the deny rules. pfSense does support NAT-T, so you're good to go. Why is my Jio SIM not making calls? Select From WAN To LAN (This could be changed to the zone of the Mail Server). Need to open outbound TCP port 445 on sonic wall router so clients can connect to azure server. Limit IPS CFT scan. 5. On the Rule Type page of the New Outbound Rule wizard, click Custom, and then click Next. Repeat the above step for all the hosts that need to relay. Under Security and Authentication, check the "username and password" option. So if http, https, ftp, telnet, etc. If on the other hand, we set up the rules exactly as shown above, the firewall would process rule # 1, see that EX01 is allowed to relay and allow the outbound packet to traverse. Most of the time, a NAT policy such as this One-to-One NAT policy for outbound traffic is used to map a servers private IP address to a public IP address, and it is paired with a reflective (mirror) policy that allows any system from the public Internet to access the server, along with a matching firewall access rule that permits this. Now we need to create the allow list. Join your peers on the Internet's largest technical computer professional community.It's easy to join and it's free. It is not natting issue it seems to be blocking of Select the zone to assign to the Address Object from the Zone Assignment menu. SSH management on the Sonicwall might be turned on and grabbing SSH traffic. sorry for the delayed up-date but i found out that my antivirus program on my PC was blocking SMTP from going out. For our example, we will use a Sonicwall TZ-215 appliance with enhanced OS however, the process is similar for many other Sonicwall enhanced OS appliance models. Reflective NAT policies are covered in the next section. If it happens to be a spamming malware, you may find your IP address blocked by several RBLs within a few hours. If SMTP traffic is the only BWM enabled rule: When SMTP traffic is using its maximum configured bandwidth (which is the 40% maximum described above), all other traffic gets the remaining 60% of bandwidth. This field is for validation purposes and should be left unchanged. Try turning off SSH management in the Network Settings - (LAN and WAN both need to be off). Primary WINS server address / Secondary WINS server address.WINS is a historic name resolution service for Microsoft's NetBIOS network protocol. 1. Here's a summary of the ports I opened from the Ring Doorbell Outbound to the Internet: TCP Port 80 TCP Port 443 TCP Port 8557 (recently added on 12/28/2020 to get LiveView to work) CAUTION: The SonicWall security appliance is managed by HTTP (Port 80) and HTTPS (Port 443), with . I am new to the Sonicwall devices. 4. In the right pane, find the rules titled File and Printer Sharing (Echo Request - ICMPv4-In) . Right-click each rule and choose Enable Rule. By default Allow all sessions originating from the LAN, WLAN to the WAN, or DMZ will be enabled in the SonicWall. For this reason, your allow rules should be placed before your deny all rule. The ANY > ANY allow rule should be the last on the list. Click on the add button and copy the settings as shown below. One of them in particular is "Packet Trace". Spice (1) flag Report Creating a One-to-One NAT Policy for Outbound Traffic, This policy is easy to set up and activate. Promoting, selling, recruiting, coursework and thesis posting is forbidden. In the Add Address Object window, enter a description for servers private IP address in the Name field. By joining you are opting in to receive e-mail. From the menu at the left, select Firewall > Access Rules and then select the Add button. . If you create an access rule for outbound mail traffic (such as SMTP) and enable bandwidth management with the following parameters: Guaranteed bandwidth of 20% Maximum bandwidth of 40% Priority of 0 (zero) The outbound SMTP traffic is guaranteed 20% of available bandwidth available to it and can get as much as 40% of available bandwidth. peter parker snaps at school fanfiction Fiction Writing. Trademarks, registered trademarks and services marks are property of their respective owners. A source configuration has the following dynamic NAT settings: global (outside) 2 interface. SSH Inspection available on some SonicWall models can interfere with communicating with the Datto device and may need to be disabled in your settings. Click Action, and then click New rule. To create the firewall rules, open your Sonicwall management interface and navigate to firewall, then access rules. Technical Support Advisor, Premier Services. data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKAAAAB4CAYAAAB1ovlvAAAAAXNSR0IArs4c6QAAAnpJREFUeF7t17Fpw1AARdFv7WJN4EVcawrPJZeeR3u4kiGQkCYJaXxBHLUSPHT/AaHTvu . Right-click the email account for which you wish to see your SMTP server settings on the left side of the window. Resolution for SonicOS 6.2 and Below The below resolution is for customers using SonicOS 6.2 and earlier firmware. Allow for an open connection should the device fail to have outbound access. Rule # 4 blocks any other host from doing so. Click Objects | Address Objects. Security, hacker detection & forensics Forum. Thanks. Save my name, email, and website in this browser for the next time I comment. Click Here to join Tek-Tips and talk with other members! 3. With this policy in place, the SonicWall security appliance translates the servers private IP address to the public IP address when it initiates traffic out the WAN interface (by default, the X1 interface). The problem is that the ICMP traffic is dropped at the sonicwall firewall and thus not able to ping external IP like 8.8.8.8, 1.1.1.1, etc. We will use -starttls smtp command. do know what i did. So we . Go to section called "add inbound NAT". As soon as it finds a match, it looks no further. *Tek-Tips's functionality depends on members receiving e-mail. . The server may be unavailable or is refusing SMTP connections." Firewall is not blocking Thunderbird, it's only set to filter. 2. Navigate to the Network | Address Objects page. Port 445 being filtered by Dell Sonicwall. Enter the new priority number (1-10) in the Priority field and click OK. Thanks for your reply, the server is external eg. before i was using a public ip given by the isp which also made as our internal gateway. The reason for this is because the firewall reads the rules in linear fashion starting from rule # 1. How to open SMTP, IMAP or POP3 traffic to an Email Server behind the SonicWALL Thank you for helping keep Tek-Tips Forums free from inappropriate posts.The Tek-Tips staff will check this out and take appropriate action. macOS Makes no difference. Click on the add button and copy the settings as shown below. The Website should display the public IP address we attached to the private IP address in the NAT policy we just created. Copyright 1998-2022 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. If you operate a small network and dont have a separate subnet for your wireless guests, or if you dont have network protection services to verify compliance, then outbound SMTP port blocking can be a lifesaver. Ensure the Stateful Packet Inspection isnot preventing the Datto device from making outbound connections. From the left pane of the resulting window, click Inbound Rules . How to Block Outbound SMTP on Sonicwall Sonic OS. There are many types of routers, firewalls and edge devices. "/> Specify your Username/Password then Click OK. These policies can be configured to allow/deny the access between firewall defined and custom zones. If you have an on-premise Exchange server, getting block listed is no fun. Login. work fine from the LAN to the WAN then chances are it won't be the sonicwall, however you might want to check your NAT polices. Hope. Registration on or use of this site constitutes acceptance of our Privacy Policy. You can unsubscribe at any time from the Preference Center. Disable signature database reload. Edit The error you're getting indicates that your ISP may be blocking you or having problems of their own. To prevent LAN users from sending outbound SMTP, select from LAN to WAN. Action: Allow Service: SMTP Source: Positini Network Destination: Mail Server Public Creating a NAT Policy This is a very nice tool that sniffs packets and can give clues as to what is wrong. On the context menu, choose "Settings.". To block the SMTP traffic from the other machines, additional network access rules can be defined to extend or override the default access rules. Have you checked the other way around? If the server you are trying to ping does not accept ICMP or ping requests it will not work for you. For example, if you do not set an outbound SMTP server, you will see the message, "Log messages and one-time passwords cannot be sent because you have not specified an outbound SMTP server address." System Information Also, you can gain further insight by utilizing the Diagnostics features. How to Block SMTP Using a SonicWALL Firewall - YouTube 0:00 / 1:49 How to Block SMTP Using a SonicWALL Firewall 13,856 views Feb 13, 2012 25 Dislike Share Save Firewalls.com 16.1K. Because SonicWall support is so lovely when I create a ticket is doesn't even appear as a case so I'm trying here: Anyone have experience using Dell SonicWall to enable access to Azure . Falcon IT Services, Inc.1111 Lincoln Road Suite 618Miami Beach, FL 33141(305) 433-6663. (c) Falcon IT Services, Inc. Add the following Allow Rule. gwinn7 (Programmer) 20 Jun 06 01:32 Also, you can gain further insight by utilizing the Diagnostics features. 256 Set a limit on a maximum allowed advertised TCP window with any DPI-based service enabled (KBytes). To sign in, use your existing MySonicWall account. Next-generation firewall for SMB, Enterprise, and Government, Comprehensive security for your network security solution, Modern Security Management for todays security landscape, Advanced Threat Protection for modern threat landscape, High-speed network switching for business connectivity, Protect against todays advanced email threats, Next-generation firewall capabilities in the cloud, Stop advanced threats and rollback the damage caused by malware, Control access to unwanted and unsecure web content. Thank you so much for your advise, after clear the low priority check I'm now able to ping and trancert at the PC. 2. Also tried adding a new email account manually. We will use the following command. You can test the One-to-One mapping by opening up a Web browser on the server and accessing the public Website http://www.whatismyip.com. Linux terminal window should appear by now. Creating the necessary Service Object NOTE: If SMTP Authentication is required click the Advanced Tab and Enable SMTP Authentication. On the left side menu bar, click Network, and the click WAN Failover & LB. meaning all http and smtp clients are using it, because of that almost everyday i am being blocked by spamhouse.org. Access rules can be created that allow SMTP access from the LAN zone to the WAN for Exchange server IP address and then add a Deny SMTP access rule for all other machines. For IPSEC, you need to open / forward / PAT the following: UDP 500, UDP 4500, ESP, Some access router have a specific feature to forward IPSEC packets. Force inbound and outbound FTP data connections to use default port 20 - The default configuration allows FTP connections from port 20 but remaps outbound traffic to a port such as 1024. If you select Custom, you see all of the . Blocking outbound SMTP traffic will not stop malware or user indiscretions, but it will stop spamming malware from using your Internet connection as a conduit for SPAM. If it is still in use in your network. Login to the SonicWall Management interface. Already a member? Click Add and create a rule as follows: Select source as the Address object created for the SMTP server. One-to-One NAT for outbound traffic is another common NAT policy on a SonicWall security appliance for translating an internal IP address into a unique IP address. All rights Reserved. Well be default you should be able to go out to the WAN from the LAN on any port. The outbound SMTP traffic is guaranteed 20% of available bandwidth available to it and can get as much as 40% of available bandwidth. Because Application Firewall runs on your SonicWALL firewall, you can use it to control both inbound and outbound traffic, unlike a dedicated proxy appliance that is typically deployed in only one . I want to implement a group of users who can browse the internet (say internet_group) Only those who has internet_group credentials can authenticate and browse the internet. This list will include all servers and devices which will be allowed to relay. ALERT: The ability to define network access rules is a very powerful tool. sorry for the extra posts. IP Address: 192.168.1.2 Creating a WAN to LAN or DMZ allow rule Navigate to the Firewall | Access Rules page. The reason for this is simple: no matter how much security you have, a piece of malware can still infect a computer in your LAN. By default, this is X1. This policy is easy to set up and activate. We have received your request and will respond promptly. The ICMP traffic is blocked in sonicwall to external IP. I believe the sonicwall is preventing me from doing this. Using custom access rules can disable firewall protection or block all access to the Internet. It has an office account and I've set the setting correctly but the firewall is blocking it outbound to O365. Using the Firewall SSLVPN Feature, you can still achieve your requirement using Netextender and with certain access rule allowing only HTTP access to local resource blocking else other. HTTPS or SSL/TLS have different subversions. Under Outbound Email Flow, click on Add Path, if you have a path already configured then click on the path and edit the path Scroll down to the Advanced Settings section You need to create a rule to allow smtp trafic through the WAN and redirect it to an IP on the LAN. yes, that is correct. 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