Mahmoud Helal

Design and Deployment of Firewall Redundancy Models in VXLAN EVPN Multi-Site Architectures #best_practices for deploying firewalls in #VXLAN_EVPN_Multi_Site data center architectures. These strategies ensure optimal security, traffic management, and redundancy across interconnected fabrics, handling both East-West and North-South traffic flows effectively. 1. Firewall as Default Gateway: - Enforces security policies for all communications within the tenant and with external resources. - Redundancy options include Active/Standby or Active/Active firewall models. 2. Firewall as Perimeter Device: - Enforces security policies on traffic entering or leaving the tenant. - The fabric acts as the default gateway for endpoints, and the firewall is the next hop to external resources. - Redundancy options include Active/Standby firewalls stretched across two fabrics and Independent Firewall Services in each fabric. 3. Traffic Stitching to Firewall Service: - Uses policy-based redirection to steer traffic through firewalls. - Redundancy options include Active/Standby or Active/Active firewall clusters connected in one-arm mode across two or more fabrics.

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What is Switch in CCNA? Switches are networking devices that allow us to let things connect locally in a building. Note that the switches are not always local but for CCNA, we need to know that the switches are local. For example, if there is a computer in a building that wants to communicate with another computer in that building, it can do so via a switch. A switch receives and forwards data to the destination device. A PC is connected via an ethernet cable to the switch. You must know that switches operate at Layer 2 of the TCP/IP or the OSI model.

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⭕ Data center management tools . Here are some popular data center management tools: ✅ Nagios: Nagios is a popular open-source tool that provides monitoring and alerting services for servers, switches, applications, and services. It can detect and resolve problems before they affect end-users. ✅ Zabbix: Zabbix is an open-source monitoring tool that can monitor servers, network devices, and applications. It offers a web-based interface for configuration, monitoring, and data visualization. ✅ PRTG Network Monitor: PRTG Network Monitor is a proprietary tool that offers network monitoring and bandwidth management. It can monitor network devices, servers, applications, and services. ✅ SolarWinds Network Performance Monitor: SolarWinds Network Performance Monitor is a proprietary tool that provides network performance monitoring and fault management. It offers features such as network discovery, mapping, and performance alerts. ✅ Data Center Infrastructure Management (DCIM) Tools: DCIM tools are designed to monitor and manage data center resources, including power usage, cooling, and space utilization. Some popular DCIM tools include Nlyte, Device42, and Sunbird DCIM. #datacenters #Monitoring #SolarWinds #Sunbird #Zabbix #Nagios #monitoringsystem #monitoringsolutions #datacenter #infrastructure #management #network #DCIM #Nlyte

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As a #DevOps Engineer, Top 15 𝐂𝐨𝐦𝐦𝐨𝐧 𝐢𝐬𝐬𝐮𝐞𝐬 𝐢𝐧 𝐋𝐢𝐧𝐮𝐱. you should be aware of : 𝟏. 𝐏𝐚𝐜𝐤𝐚𝐠𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐈𝐬𝐬𝐮𝐞𝐬: -  Issue: Unable to install a package. -  Solution: Use the package manager for your distribution (e.g., `apt` for Debian/Ubuntu, `yum` for CentOS) and ensure repositories are properly configured.   𝟐. 𝐍𝐞𝐭𝐰𝐨𝐫𝐤 𝐂𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐚𝐭𝐢𝐨𝐧: -  Issue: No internet connection. -  Solution: Check network cables, run network diagnostic commands (`ifconfig`, `ping`), and verify DNS settings.   𝟑. 𝐏𝐞𝐫𝐦𝐢𝐬𝐬𝐢𝐨𝐧 𝐏𝐫𝐨𝐛𝐥𝐞𝐦𝐬: -  Issue: Permission denied while trying to access or modify files. -  Solution: Use `chmod` or `chown` to adjust file permissions or ownership. Be cautious not to modify critical system files.   𝟒. 𝐁𝐨𝐨𝐭 𝐏𝐫𝐨𝐛𝐥𝐞𝐦𝐬: -  Issue: System not booting properly. -  Solution: Use a live CD/USB to access the system, repair the bootloader (e.g., Grub), or fix corrupted system files.   𝟓. 𝐔𝐩𝐝𝐚𝐭𝐞 𝐈𝐬𝐬𝐮𝐞𝐬: -  Issue: Software updates fail. -  Solution: Check repositories, update the package list (`sudo apt update`), and then upgrade packages (`sudo apt upgrade`).   𝟔. 𝐃𝐢𝐬𝐤 𝐒𝐩𝐚𝐜𝐞 𝐏𝐫𝐨𝐛𝐥𝐞𝐦𝐬: -  Issue: Running out of disk space. -  Solution: Identify large files/directories (`du` or `df` commands) and remove unnecessary files. Be careful not to delete critical system files.   𝟕. 𝐆𝐫𝐚𝐩𝐡𝐢𝐜𝐚𝐥 𝐈𝐧𝐭𝐞𝐫𝐟𝐚𝐜𝐞 𝐈𝐬𝐬𝐮𝐞𝐬: -  Issue: Desktop environment not loading. -  Solution: Check graphics drivers, reinstall desktop environment, or switch to a different one.   𝟖. 𝐊𝐞𝐫𝐧𝐞𝐥 𝐏𝐚𝐧𝐢𝐜: - Issue: Kernel panic during boot. - Solution: Boot into a different kernel version, update the kernel, or reinstall the kernel package. 𝟗. 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐏𝐫𝐨𝐛𝐥𝐞𝐦𝐬: - Issue: Unable to log in. - Solution: Verify username and password, check for CAPS LOCK, and reset password if needed.   𝟏𝟎. 𝐒𝐰𝐚𝐩 𝐒𝐩𝐚𝐜𝐞 𝐈𝐬𝐬𝐮𝐞𝐬: - Issue: Insufficient swap space. - Solution: Resize or add swap space using `swapon` or by modifying the `/etc/fstab` file.   𝟏𝟏. 𝐅𝐢𝐥𝐞 𝐒𝐲𝐬𝐭𝐞𝐦 𝐂𝐨𝐫𝐫𝐮𝐩𝐭𝐢𝐨𝐧: -Issue: File system errors. -Solution: Run file system checks (`fsck`) on unmounted partitions to fix errors.   𝟏𝟐. 𝐈𝐧𝐜𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐥𝐞 𝐋𝐢𝐛𝐫𝐚𝐫𝐢𝐞𝐬: -Issue: Missing or incompatible libraries. -Solution: Install required libraries using the package manager.   𝟏𝟑. 𝐒𝐲𝐬𝐭𝐞𝐦𝐝 𝐒𝐞𝐫𝐯𝐢𝐜𝐞 𝐅𝐚𝐢𝐥𝐮𝐫𝐞𝐬: -Issue: Service not starting. -Solution: Check service status with `systemctl status`, review logs, and restart the service.   𝟏𝟒. 𝐅𝐢𝐫𝐞𝐰𝐚𝐥𝐥 𝐂𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐚𝐭𝐢𝐨𝐧: -Issue: Unable to access services due to firewall. -Solution: Adjust firewall rules using tools like `ufw` or `firewalld`. 𝟏𝟓. 𝐒𝐄𝐋𝐢𝐧𝐮𝐱 𝐈𝐬𝐬𝐮𝐞𝐬: -Issue: SELinux denials. -Solution: Review SELinux logs, adjust SELinux policies, or set SELinux to permissive mode. #devopsengineer #linux #interview

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#vmware Key Skills for Network and Storage Virtualization Engineers: Network Virtualization: 1. Networking fundamentals (TCP/IP, DNS, DHCP) 2. Virtual networking protocols (VXLAN, NVGRE, Geneve) 3. Software-defined networking (SDN) concepts 4. Network virtualization platforms (VMware NSX, Cisco ACI) 5. Security protocols (SSL/TLS, IPsec) 6. Scripting languages (Python, PowerShell) 7. Cloud computing platforms (AWS, Azure, Google Cloud) Storage Virtualization: 1. Storage fundamentals (SAN, NAS, Fibre Channel) 2. Storage virtualization protocols (iSCSI, Fibre Channel over Ethernet) 3. Storage virtualization platforms (VMware vSAN, Microsoft Storage Spaces) 4. Data deduplication and compression 5. Storage performance optimization 6. Cloud storage platforms (AWS S3, Azure Blob Storage) 7. Scripting languages (Python, PowerShell) Common Skills: 1. Virtualization platforms (VMware vSphere, Microsoft Hyper-V) 2. Linux and Windows operating systems 3. Cloud computing platforms 4. Scripting languages (Python, PowerShell) 5. IT service management (ITIL) 6. Troubleshooting and problem-solving 7. Communication and collaboration Key Tools: Network Virtualization: 1. VMware NSX 2. Cisco ACI 3. Juniper Contrail 4. OpenStack Neutron 5. Wireshark 6. TCPdump 7. Network monitoring tools (SolarWinds, Nagios) Storage Virtualization: 1. VMware vSAN 2. Microsoft Storage Spaces 3. NetApp ONTAP 4. EMC Storage Virtualization 5. Storage performance monitoring tools (IOmeter, Storage Performance Council) 6. Data deduplication tools (Veeam, CommVault) 7. Cloud storage gateways (AWS Storage Gateway, Azure Storage Gateway) Common Tools: 1. Virtualization management tools (vCenter, Hyper-V Manager) 2. Cloud management platforms (AWS Management Console, Azure Portal) 3. Scripting tools (PowerShell, Python) 4. Monitoring and logging tools (Splunk, ELK) 5. IT service management tools (ServiceNow, JIRA) Certifications: 1. VMware VCP-NV (Network Virtualization) 2. Cisco CCNA-DC (Data Center) 3. Microsoft MCSA-Storage (Storage Solutions) 4. AWS Certified Solutions Architect - Associate 5. VMware VCP-Cloud (Cloud Management) Education and Training: 1. Vendor-provided training (VMware, Cisco, Microsoft) 2. Online courses (Udemy, Coursera, edX) 3. Industry conferences and workshops 4. Books and blogs (network and storage virtualization) 5. Professional associations (VMware User Group, Cisco Networkers) By possessing these skills and tools, network and storage virtualization engineers can design, implement, and manage efficient and scalable virtualized infrastructure.

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VLAN Lab CCNA-highlight: Write your answer in the comments. .. .. @_networkforyou_ .. .. Follow us on Instagram. .. .. Turn on post notifications. .. .. @_networkforyou_ .. .. ccna200301 ccnp ccnacertification ccnatraining ccnp_security ccnpencor Thanks Networkforyou ccnacertification ccnpencor ccnatraining ccnp #ccna200301 #CCNA #netwokforyou #CCNPSecurity

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السلام عليكم ورحمه الله وبركاته انا محتاج فرصه شغل System Administrator خبره 5سنين جوه مصر أو بره مصر Excellent preparing and configure Dell & HPE & other servers such as RAID & iDRAC. Excellent installing & configure Virtual severs such as VMware ESXI hypervisor with vSphere client & Microsoft Hyper V High Experience in any software Excellent creating firewall & Security Systems. Excellent Creating Networking Systems & Creating Domain Controllers and Managing Users and Getting Users Permissions. Excellent installing and using and managing any firewall and networking programs such as (ISA-TMG-Microtek-Kerio Control-Mac-Linux, Fortinet, Sophos -CESCO and each other’s. and Creating Firewall High Availability.) Excellent installing and using most of Linux distributions (desktop and servers) such as (Debian, Ubuntu, read hat, Cent OS, and each other) Excellent installing and using Kali Linux, and other security testing systems. Excellent Creating and Configure Unified communication Servers using Asterisk Linux, Elastics, Kerio Operator and CESCO UC. And configure it from servers to end devises such as computers soft phones, Ip phones, mobile soft phones Apps. And analog phones. *And Making Call Centers. Excellent Using VPN Excellent Connecting multi offices using VPN and Nano stations. Excellent Creating Video surveillance systems (analog – digital – IP Cam) . Excellent using Web monitoring and managing web accessing permissions and traffics and filtering. Excellent Using endpoint antivirus and any deployment programs. Excellent using network remote controlling. High Experience in any computer sound systems High Experience in any computer video systems High Experience in Photoshop & Illustrator & All other graphics Programs Excellent Using All M.S. Office Programs Excellent Using Any Presentation Programs and data show and interactive systems. Excellent Creating print server such as Papercut print server and configure it for desktop and mobile clients. Excellent planning Network Diagrams & Heat Maps. Excellent Configuring Any Network Switches Such As Cisco, Juniper, HPE, Aruba With GUI & Consul. Excellent Creating Any Wi-Fi Solutions And Systems with Any brand Devices. Excellent using Mobile management systems (MDM) (installing and configuring & control any platform mobiles (android -IOS - Chrome OS. -Win.) Excellent Installing & Configuring Manage Engine Products. Excellent Installing & Configuring Veeam Backup & Replication & Any backup programs & solutions Such as QNAP Excellent Installing & Configuring Any Storage Software OR OS & solutions Such as True NAS. Excellent installing & Configuring Papercut Printing Server. Excellent installing & Configuring Any Media & DLNA Streaming Servers. Excellent installing & Configuring Any Deployment OS & Apps Software Such As WDS, AOMEI, Acronis, Manage Engine, and each Other. Excellent Configuring Any fingerprint & Access Control Systems Such As opining doors with Face or finger.

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𝗟𝗔𝗕 - 𝗛𝗦𝗥𝗣 (𝗛𝗼𝘁 𝗦𝘁𝗮𝗻𝗱𝗯𝘆 𝗥𝗼𝘂𝘁𝗲𝗿 𝗣𝗿𝗼𝘁𝗼𝗰𝗼𝗹) Objectives: 🌼Task 1: Configuring the HSRP Version 🌼Task 2: Configuring the Virtual IP 🌼Task 3: Configuring the HSRP Timers 🌼Task 4: Configuring the priority 🌼Task 5: Configuring HSRP Preemption 🌼Task 6: Configuring HSRP MD5 Authentication 🌼Task 7: Verification

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#BGP states concept 1- The first step in BGP is the IDLE state, which happens when it configures BGP and waits for a TCP connection. (Like when one router is configured and the opposite side is not configured) If the TCP connection is established but the open parameters on both sides are incompatible, it returns to the IDLE state. If unsuccessful, BGP establishes a session and waits 60 seconds using a throttle mechanism during the reconnection timer and then retries to establish a connection. On the second attempt, BGP waits 120 seconds. This time will be different from other vendors. 2- When TCP starts, it enters the connection state and tries to establish a TCP session. If it is unsuccessful, it enters the active state and its timer is activated for one minute. When the timer expires, it returns to the connected state. If it fails again, it returns to Idle status 3- If the TCP session is successfully established, it will enter the OpenSent state. If the open is sent successfully, it will enter the OpenConfirm state and receive a keepalive. 4- When keepalive arrives, it means both sides are in an OpenConfirm state. So they enter the established state and start sending updates.

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Active Directory (AD) replication issues on a Windows Server 2019. Step-by-step guide to troubleshoot and resolve these issues: Step-by-Step Troubleshooting Guide 1. **Verify Replication Status** Use the Repadmin Tool:** - Open Command Prompt as an administrator. - Run `repadmin /replsummary` to get a summary of replication status. - Run `repadmin /showrepl` to see detailed replication information for each DC. Check Event Logs:** - Open Event Viewer and check the Directory Service logs for replication-related errors and warnings. 2. **Network Connectivity** Ping Test:** - Ensure all Domain Controllers (DCs) can ping each other. Port Check:** - Make sure necessary ports for AD replication are open (e.g., TCP 135, 389, 636, 3268, 3269, 53, 88, 445). DNS Resolution:** - Verify that DNS is working correctly. Each DC should resolve the names of other DCs. 3. **Check Replication Topology** *Using Sites and Services:** - Open "Active Directory Sites and Services" and check the replication topology. - Ensure all DCs are correctly placed in sites and linked by site links. 4. **Review and Correct DNS Settings** *Primary and Secondary DNS:** - Ensure each DC uses itself as the primary DNS server and another DC as the secondary DNS server. - **DNS Zones:** - Ensure all necessary AD-related DNS zones (_msdcs, _sites, _tcp, _udp) are present and correctly configured. 5. **Synchronize Time Settings** - **NTP Configuration:** - Ensure all DCs have the correct time configuration. - The PDC Emulator should sync with an external NTP source. - **Check Time Sync:** - Run `w32tm /query /status` on each DC to verify time synchronization status. 6. **Resolve AD Database Issues** - **Check NTDS Settings:** - Run `ntdsutil` to check and repair the AD database. - **Defragment AD Database:** - Perform an offline defragmentation if the database is heavily fragmented. 7. **Review Replication Permissions** - **Check Permissions:** - Ensure that necessary accounts and DCs have the correct permissions for replication. 8. **Force Replication** - **Use Repadmin:** - Run `repadmin /syncall /AeD` to force replication between all DCs. 9. **Check for Lingering Objects** - **Use Repadmin to Remove Lingering Objects:** - Run `repadmin /removelingeringobjects <DC_GUID> <NC> /ADVISORY_MODE` to identify lingering objects. - Remove identified lingering objects with the appropriate command. 10. **Additional Diagnostic Tools** - **Dcdiag:** - Run `dcdiag /v` to perform a detailed diagnostic on DCs. - Focus on errors and warnings related to replication Netdiag:** - Run `netdiag /v` to diagnose network-related issues. 11. **Review and Apply Patches and Updates** Update Windows Server:** - Ensure all DCs have the latest updates and patches applied. Commands Repadmin:** ```shell repadmin /replsummary repadmin /showrepl repadmin /syncall /AeD Dcdiag:** ```shell dcdiag /v *Netdiag:** ```shell netdiag /v

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"5 Best Practices for Efficient Server Management" As a Linux System Admin Engineer, efficient server management is key to maintaining uptime and performance. Here are my top 5 best practices: 1. Automate repetitive tasks: Use scripts and tools like Ansible and Puppet. 2. Monitor system performance: Implement monitoring tools such as Nagios or Zabbix. 3. Regular backups: Ensure frequent backups and test restore processes. 3. Security first: Regularly update systems and use firewalls. 4. Documentation: Keep detailed documentation for configurations and procedures. What are your go-to practices? #linux #linuxadmin #devops

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New: Implementing MPLS TE (VRF - PE) using CI/CD ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ revolutionizes network management by automating the deployment and configuration of Multi-Protocol Label Switching Traffic Engineering (MPLS TE) with Virtual Routing and Forwarding (VRF) on Provider Edge (PE) routers. This approach leverages Continuous Integration and Continuous Deployment (CI/CD) pipelines to ensure consistent, reliable, and rapid updates to network infrastructure. By integrating CI/CD practices, network administrators can achieve greater agility, reduced downtime, and improved scalability, ensuring that MPLS TE services are delivered with optimal performance and reliability.

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Find PDF document for CCIE DevNet:- CCIE DevNet 1.0: Software Design, Development, and Deployment Maintainability 🛠️ Focus on writing clean, modular, and well-documented code to ensure that the software can be easily maintained and updated. Modularity 🧩 Design software in a modular way, breaking down functionalities into reusable and independent modules or components. Scalability 📈 Ensure that the software can handle increased loads by designing scalable architectures and leveraging cloud technologies. Security 🔒 Implement security best practices throughout the software development lifecycle to protect data and prevent vulnerabilities. Automation 🤖 Utilize automation tools and techniques to streamline the deployment, testing, and monitoring of applications, enhancing efficiency and reducing manual errors. 👨‍💻👩‍💻Only 48 Hours Left - Top Udemy Courses👨‍💻👩‍💻 Enroll now and take the first step towards a rewarding networking career! Use the Coupon Code:- LEARNING and course link below to get rock bottom price. 200-901 DEVASC - Zero To Hero Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/gn6CCmci Cisco DNAC & SDA Zero to Hero - Training Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/e36-2Xmt CCIE Enterprise Infrastructure (v1.0) - Technical Classes Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/g8KZ5kQC CCIE Data Center (v3.0) - Technical Classes Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link-  https://lnkd.in/gR5j8b_D Job Oriented Internetworking Training - LEARNING Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/gb4SYc76 SD-WAN Zero to Hero Training Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/gQdgKdXW CCNP Enterprise -300-415 ENSDWI : Implementing Cisco SD-WAN Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/gGEfzCn4 CCNP Data Center -350-601 DCCOR Implementing and Operating Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/ez72iasU Cisco CCNP Enterprise - 350-401-ENCOR - FastTrack Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/gBWFzg5g CCIE Data Center - Zero to Hero Rating: ⭐️⭐️⭐️⭐️⭐️ Coupon: LEARNING Course Link- https://lnkd.in/gnAZxhXK BR, Ratnesh K CCIE x3

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Virtualization

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Route Redistribution configuration https://lnkd.in/d2mk45z

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Route Redistribution configuration https://lnkd.in/d2mk45z

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