Android tablet can use linuxdela

Aplikacija je narejena, potrebna je implementacija Google pay sistema

Iščem freelancerja za izdelavo bolj kot ne preproste APP za android in potem s sprotnim vzdrževanjem/nadgrajevanjem glede na nadgradjne android OS.. Imam že sourrce, a je žal zastarel in ga android ne mara več ?.

Iščemo osebo za izdelavo mobilne aplikacije za iOS in Android. Dizajn je že narejen v Adobe XD. Hvala.

Potreboval bi Android/iOS aplikacijo. Temeljila bi na analizi uporabnikovih slik zajetih s selfie kamero in analizi parametrov na sliki. Algoritem za analizo slike imam že pripravljen v programu Matlab. Načrt aplikacije z wireframe-om lahko v celoti pripravim sam, tako, da bi bila naloga programerja prepis vsega v programsko kodo.

Robert zdravo. S kolegom razvijava mobilno aplikacijo in bi potrebovala frontend designerja. Backend programiranje je že skoraj pripravljeno. Je zelo preprosta aplikacija za IOS in Android. Bi vas zanimalo sodelovanje? . Hvala za odgovor. LP S

Iščem nekoga, ki bi mi naredil preprosto android/iOS aplikacij za spletno stran . V bistvu gre samo za zaslonske menije povezane med seboj. Na koncu pa stran z linki do učnih listov na internetu. Dodatne informacije : @

Potrebujem aplikacijo za tablico in telefon, na sistemu android. Gre se za program, kateri se uporablja pri odkupu lesa. Glavni del je kubiciranje hlodovine ( po znani formuli), ustavarjanje novih dokumentov, dodajanje različnih strank.. in na koncu možnost tiskanja in izpisa v pdf-ju... več informacij kasneje...

imamo že narejeno aplikacijo v starejši verziji androida. ker ne dela več vse, jo je potrebno popraviti

...1 mesec  Poln (8 urni) delavnik  Delo za nedoločen čas Kaj podjetje pričakuje od kandidatov  Zaželjena/zahtevana VI stopnja izobrazbe  Zahtevamo vsaj 5 let delovnih izkušenj  Prednost bodo imeli kandidati z delovnimi izkušnjami na podobnih delovnih mestih/področjih  Znanje računalniških programov PHP, MySQL, JAVA  Znanje tujih jezikov: Italijanščina in Angleščina   Zaželjeno znanje Android-a  Samostojnost  Natančnost  Izkušnje z vodenjem projektov  Izkušnje z delom v skupini - Kaj podjetje kandidatu/om ponuja  Stimulativno plačilo  Možnost dodatnih izobraževanj (doma in v tujini)  Nagrajevanje uspešnosti  Delo v mladem in inovativnem okolju,  Urejeno delovno okolje v prestižni stavbi  M...

...1 mesec  Poln (8 urni) delavnik  Delo za nedoločen čas Kaj podjetje pričakuje od kandidatov  Zaželjena/zahtevana VI stopnja izobrazbe  Zahtevamo vsaj 5 let delovnih izkušenj  Prednost bodo imeli kandidati z delovnimi izkušnjami na podobnih delovnih mestih/področjih  Znanje računalniških programov PHP, MySQL, JAVA  Znanje tujih jezikov: Italijanščina in Angleščina   Zaželjeno znanje Android-a  Samostojnost  Natančnost  Izkušnje z vodenjem projektov  Izkušnje z delom v skupini - Kaj podjetje kandidatu/om ponuja  Stimulativno plačilo  Možnost dodatnih izobraževanj (doma in v tujini)  Nagrajevanje uspešnosti  Delo v mladem in inovativnem okolju,  Urejeno delovno okolje v prestižni stavbi  M...

...1 mesec  Poln (8 urni) delavnik  Delo za nedoločen čas Kaj podjetje pričakuje od kandidatov  Zaželjena/zahtevana VI stopnja izobrazbe  Zahtevamo vsaj 5 let delovnih izkušenj  Prednost bodo imeli kandidati z delovnimi izkušnjami na podobnih delovnih mestih/področjih  Znanje računalniških programov PHP, MySQL, JAVA  Znanje tujih jezikov: Italijanščina in Angleščina   Zaželjeno znanje Android-a  Samostojnost  Natančnost  Izkušnje z vodenjem projektov  Izkušnje z delom v skupini - Kaj podjetje kandidatu/om ponuja  Stimulativno plačilo  Možnost dodatnih izobraževanj (doma in v tujini)  Nagrajevanje uspešnosti  Delo v mladem in inovativnem okolju,  Urejeno delovno okolje v prestižni stavbi  M...

I'm in need of a skilled mobile app developer to create an Android app with e-commerce functionality. Key functions should include: - Shopping cart - Product reviews - Payment gateway integration - A unique function for ordering food through videos - A feed feature similar to TikTok but specifically focusing on food videos. The ideal freelancer for this project would have solid experience in Android app development with a special focus on e-commerce applications. Familiarity with video integration and social media style feeds will be highly advantageous.

Need an android app to generate a pdf document. We have following fields to fill up and also et the end we need to be able to add a signature. - number - date - name - id series -id number - personal identification number - city - address - county - starting date - net income - gross income need to be able to generate pdf and also email option to send directly to email and print option

I'm in need of an expert software developer to create Trinamic motor control software. The software needs to be compatible with Trinamic ...to be compatible with Trinamic motor control boards, specifically the TMCM-1260. The language required is Trinamic motor control command set. Key details include: - Operating System compatibility: Windows, Linux, and MacOS. - Required Programming Language: Trinamic Motor Control Command Set. - Timeline: Expected completion of the project is ASAP. Ideal Candidate: Would have experience and skill in dealing with motor control boards, TMCM-1260 in particular, as well as the Trinamic command set. A comprehensive understanding of multiple operating systems will be beneficial too. Those who can work within a tight timeframe would be best...

I need an experienced designer to help me create a form and results page that is compatible with mobile, tablet, and desktop. The form will have less than 5 fields, but will require special features such as validation checks and file upload capabilities. Key Points: - Design a form with less than 5 fields - Ensure the design is responsive and compatible with mobile, tablet, and desktop platforms - Implement validation checks to ensure accurate data submission - Integrate a file upload capability for user convenience Ideal Skills: - Proficiency in UI/UX design - Experience in designing responsive web applications - Knowledge of form validation and file handling - Strong communication and problem-solving skills Please provide examples of previous projects you've worked ...

I'm in immediate need of an Android developer with Kotlin knowledge who can promptly resolve a resource compilation issue in my project. Resolve this issue via Anydesk preferable. Specific issue is: Execution failed for task ':app:mergeDebugResources'. > A failure occurred while executing > Resource compilation failed (Failed to compile values resource file C:UsersrabikAndroidStudioProjectsMissWordsappbuildintermediatesincrementaldebugmergeDebugResourcesvaluesvalues.xml. Cause: : Cannot invoke "()" because the return value of "()" is null). Check logs

(ALL INFO IN DESCRIPTION-SEND ACCURATE BID ELSE YOU WILL BE REPORTED)****** I'm looking for an experienced developer who can create a web-based calendar with a unique feature to allow my users admin to book dates. If a date is unavailable, the application should clearly indicate it. Calendar app **1. User Registration:** - Admin creates a new user by providing a username and password. - Store the user's credentials securely in a database, with password hashing and salting for security. -Allow user to make remember me so they don’t have to login each time. **2. User Login:** - User enters their username and password on the login page. - The system checks the provided credentials against the database records. - If the credentials are valid, the user is granted a...

I'm looking for a top-tier Android developer in Delhi, with fluency in Java, Kotlin, and C++. The project scope is to develop an Android application from scratch for an industry outside of healthcare, education, or e-commerce. Key Responsibilities: - Develop a brand new Android application, focusing on high-quality coding and user experience. - Work closely with me to understand the project requirements and provide your expert insights. - Implement a responsive and secure backend system to support the app's functionality. Ideal Skills: - Proficiency in Java, Kotlin, and C++. - Proven experience in developing Android applications from scratch. - Understanding of app design principles and user experience. - Ability to create a responsive and secure bac...

I'm seeking a skilled Flutter developer to assist with a few functional enhancements on our existing iOS and Android webview app. The project involves integrating push notifications, enabling file uploading in Android, ensuring mailto links open in the mail app, and addressing issues with loading images in the side menu and header logo. Key Requirements: - Extensive experience with Flutter, particularly in the context of webview apps. - Demonstrable expertise in integrating push notification services. - Prior work on file upload functionality in Android webview apps. - Familiarity with handling mailto links in webview apps. - Proven ability to troubleshoot and resolve image loading issues in webview apps. Your role will primarily focus on implementing these enha...

I'm looking for a skilled Android app developer to create a comprehensive mobile app focusing on Family Planning. The app will serve as an educational resource and a referral service for users exploring family planning methods. Key Requirements: - Development on Android Platform: The app should specifically be developed for Android devices. - Comprehensive Information: The app should provide detailed information on all family planning methods, including effectiveness, usage instructions, and potential side effects. - Side Effects and Management: Users should be able to access information on the potential side effects of various family planning methods, as well as guidance on how to manage these effects. - Referral Service: The app should offer users options to fi...

Estamos buscando un desarrollador freelancer con experiencia en Flutter para crear una aplicación de chatbot para Android e iOS. La aplicación debe cumplir con los siguientes requisitos: Requisitos del Proyecto Interfaz de Chat: Implementar una interfaz de chat donde el usuario pueda interactuar exclusivamente con un chatbot. No habrá interacción con otros usuarios. Captura de Fotos: Integrar funcionalidad para que el usuario pueda tomar fotos directamente desde la aplicación. Las fotos deben poder ser enviadas al chatbot. Envío de Imágenes y PDFs: Permitir al usuario enviar imágenes y archivos PDF al chatbot. Integración con API: La aplicación se conectará a un API para obtener la información n...

I'm seeking an experienced system administrator to configure a Linux webserver that integrates Hestia Control Panel (CP). Key Deliverables: - Enable web hosting functionality for between 1 to 5 websites. - Configure email management services - specifically, the ability to setup email accounts and implement a solid spam filtering system. Ideally, the freelancers bidding on this project should have prior experience setting up and managing Linux servers and using HestiaCP. Knowledge of website and email database management, spam filtering techniques is a plus. Deliver reliable, secure, and high-performing results.

We're searching for a skilled designer to create a minimalistic UI for our iOS and Android mobile app. The UX must be simplistic yet intuitive drawing from modern design principles. Key Functions: - Beautiful, elegant design to bring our brand to life - Management of our project branded payment card - Navigation of merchant offers and rewards - Navigation of transactional history - Navigation of loading cryptocurrency prior to spending - Additional features.. Ideal Skills and Experience: - Proficient mobile designer for iOS and Android design principles - Prior experience in minimalist and modern design aesthetics - Familiarity with neumorphism is a bonus (may explore this style) - Understanding of financial apps and the uniqueness of cryptocurrency is preferred ...

We have Andorid TV app built in OS 9 chipmunkband seem to have problem working in Andorid boxes 10 and 11 but work on phone no problem and So we think we may need to upgrade gradle and some depencies Also we need package changed so the upgrade is done it will installed and not conflict with exsisting apps that are same Build .so os will see as a different app Attached are two soure codes similar

I'm in need of an Android app, designed to cater for both phones and tablets. The app is dedicated to astrology, and must include the following features: - Daily Horoscope: A system that can provide daily horoscope readings for users. - Zodiac Compatibility: A feature allowing users to check the compatibility between different zodiac signs. - Birth Chart Analysis: A section for detailed birth chart analysis for users. I'm looking for a developer who has ample experience in Android app development, particularly in the realms of astrology or similar niche markets. Strong UI/UX design skills would be highly beneficial. Please share any relevant portfolio pieces when bidding.

I'm looking to hire a UI/UX designer with a focus on Android devices. The design will primarily be used for my website and app, which aim to sell products/services. Key Responsibilities: - Designing an efficient and visually appealing UI/UX for Android users - Ensuring the design is optimized for web and app usage - Incorporating best practices for e-commerce websites to enhance user experience and drive conversions Ideal Skills and Experience: - Proficiency in designing for Android platforms - Strong portfolio showcasing previous web and app design projects, particularly e-commerce - Understanding of UX principles and ability to translate them into intuitive design - Knowledge of current UI trends and best practices, with a focus on responsive design Please pr...

...Persona Reader. Key Requirements: - Build a custom Odoo 14 module based on the Linux operating system. - The primary purpose of the module is user authentication leveraging fingerprint scanning technology. - The module should be developed using Python and JavaScript programming languages. Your responsibilities will include: - Analyzing the requirements and proposing a suitable solution. - Designing and developing the module from scratch. - Integrating the module seamlessly with the UareU Digital Persona Reader. - Ensuring the module complies with Odoo 14's community module development standards. The ideal candidate should have: - Strong experience in Odoo 14 and its community module development. - Proficiency in Linux operating system. - Proven track record in de...

...need a skilled Figma designer to create a tablet UI design for an app targeted at adults. The project will involve: - Must be Aware about Design improvement with Existing Functionally. - A Person must be Creative to Think About Design & User Perceptive. - Good Knowledge About Responsive Design (Mobile & Tablet) - UI Design: Translating wireframes into aesthetically pleasing, user-friendly interfaces. - Prototyping: Developing interactive prototypes to visualize the app's functionality and flow. What We Can Provide? 1. Design Reference. 2. Design Additional Requirement 3. Theme Documents with Brand Colors & Text with Size Note: A Person Must Be ready For Active Communication & Needed Changes. The ideal candidate will have experience in...

I am looking for an experienced mobile app developer to create a mobile app for IOS and Android devices. Mobile application to manage two devices: The objective is to develop an application to manage two devices via WiFi (can be expanded in the future). We have two devices: sauna and red light therapy panel. They all have a touch control panel and can connect to your mobile phone via Bluetooth and Wi-Fi. Many of the providers even offer you the mobile application already developed (as you can see in the video of the red light panel) but only for each product category. The idea is to make a similar application from which the two devices can be managed (time programming, lighting, power, etc.). And the history of uses/configurations is saved. Please cla...

We are a Chinese company, we need someone in India who has an Apple ID to test downloading, registering and using our APP.

I'm working on a PWA application and require a developer to help integrate the following features: - Taking a photo using the phone camera - Saving the photo to a MySQL database - Capturing the GEO Location of the phone and associating it with the photo The PWA will be optimized for both Android and iOS platforms, so experience with development for these platforms is essential. Most of the pages in the PWA is PHP In your application, please provide examples of your past work that are relevant to this project. It will help me evaluate your experience and capabilities.

I'm seeking a professional ethical hacker to conduct penetration testing on a single Linux system network. Scope of Work: - Carry out ethical hacking and perform penetration testing - Identify vulnerabilities in our Linux system network Ideal Skills and Experience: - Cybersecurity - Ethical Hacking Skills - Strong understanding of Linux networks - Excellent problem-solving abilities - Previous experience in penetration testing and vulnerability assessment This project welcomes freelancers who can offer security consultations and recommendations based on the results of the testing. Ensuring the stability and security of our Linux system network is the top priority.

I am in need of a skilled developer to create a high-quality Android casino app. Key Features: - User Registration and Login: Users should be able to create accounts and log in to play. - Casino Games: A variety of casino games will be integrated into the app to keep users engaged. - Payment Integration: The app should have secure payment gateways for in-app purchases and withdrawals. - Admin Control: I need a separate admin login with the capability to: - Adjust game rules: The admin should have the power to tweak rules to improve user experience. - Change game outcomes: Admin should be able to modify game outcomes to keep the experience fair and engaging. - Manage user accounts: The ability to oversee and moderate user accounts is crucial. Design Preferences: - The u...

...messenger app, similar to WhatsApp, developed specifically on Flutterflow. It should be available on both Android and iOS platforms, and operate efficiently in a single (English) language. Key Features Required: - Chat messaging: Users should be able to send and receive messages readily. - Voice Calls: The app should enable voice calls between users. - Video Calls: Users should be capable of video calling one another. - File Sharing: The capability to send and receive files, such as photos, docs, and more. - Voice and Video Sharing: Users should be able to share voice notes and videos alike. - Able to change logo, colors, fonts and app name through admin panel for private and internal use of companies. - I will own the full royalty of the app. The developer undertaking ...

I need a freelancer who can assist me in setting up a CentOS EC2 Webserver and a WordPress instance on AWS S3. The project is urgent so I need someone who can start immediately and work with me remotely over Google Meet. Key requirements include: - Installation of CentOS EC2 Webserver - Setup of a WordPress instance on AWS S3 Ideal skills for this project include: - Proficiency in Linux system administration, specifically CentOS - Experience with AWS services, particularly EC2 and S3 - Knowledge of WordPress configuration and setup Please only apply if you're available to start right now as this is an urgent project.

Develop and maintain the mobile app on iOS and Android platforms Build a scalable and secure backend infrastructure Integrate third-party APIs and services Collaborate with UI/UX designers to ensure a seamless user experience Perform thorough testing and debugging

...for specific platforms. This client will cater to Windows and Linux operating systems. Key Requirements: * The core capability of the Python SIP client will be to facilitate audio calling. Therefore, the developer must focus primarily on this function. * For safety and security, a basic username and password system will suffice for user authentication. Ideal Skills & Experience: * Proficiency in Python language is mandatory. * Prior experience in developing communication applications, specifically in SIP, will be beneficial. * An in-depth understanding of user authentication using basic username and password systems is required. * Familiarity with Windows and Linux environments is a must. Consider this an opportunity to use your skills to create a streamlin...

I'm in need of a competent app developer to create a Sparks app for the Android platform. The key feature of the app should be order tracking. Technical Skills and Experience Required: - Proficient in Android app development - Prior experience in creating apps with order tracking feature - Strong understanding of UI/UX for mobile devices - Knowledge in modern design practices Design aesthetics are open for discussion given I've skipped that part in the questionnaire. Deliver an app that is functional, user-friendly, and complements the Sparks brand. Your portfolio showcasing similar projects would be of great interest.

...developer to create an engaging 2D game for both iOS and Android platforms. The main objective of this game is to complete levels, and I envision it in a fun and playful cartoonish art style. Key Requirements: - The game should feature 10 levels in total, each progressively more challenging than the previous. - Implement in-game purchase functionalities to enhance player experience. These should be well-integrated into gameplay without disrupting the user experience. - The game must be compatible with both iOS and Android devices, ensuring smooth performance and functionality on various screen sizes and resolutions. Skills and Experience: - Proven track record in developing 2D games for mobile platforms, particularly iOS and Android. - Proficiency in creating eng...

...should be multi-purpose, with areas for table top and card games, "video game tables", as well as adaptable space for B2B events or co-working. Key project elements: - The e-sport gaming area is the central focus. - A comfortable and homey interior design style is preferred. - Despite the diverse usage, the space should flow naturally and cohesively. - Incorporate dining areas where players can eat while engaging in video games. - The design should be flexible to also accommodate B2B events or transform into a co-working environment when needed. Ideal candidates should have: - Prior experience in architectural design of gaming or recreational areas. - A strong eye for interior design, particularly comfortable and homey styles. - Knowledge of e-sports and gaming c...

Quiero realizar 2 cambios en mi aplicación movil PLANNI de Productividad y gestion del tiempo y 1 revision, esos 2 cambios que voy a pedir y la revisión deben actualizarse tanto en Play Store de Google Play como en App Store para IOS. (Ya que la aplicación funciona tanto para Android como para IOS). Los 2 cambios que solicito son los siguientes: 1-Las tareas (To Do) tienen un apartado y los habitos tienen otro apartado cada uno se muestra por separado y yo quiero que el usuario pueda seleccionar las tareas y los habitos al mismo tiempo en el menú y se puedan mostrar ambas cosas en la pantalla y que si quiero seleccionar solo 1 pueda ver solo uno, pero si quiere seleccionar las 2 pueda ver las 2. (Ver video 2 anexo). 2-El punto numero 2, es que yo pueda...

"EcoFuturo" es un juego de granja en 3D ambientado en un futuro cercano, donde los jugadores gestionan una granja sostenible y de alta tecnología en un entorno urbano y ecológico. El juego combina elementos tradicionales de gestión de granjas con innovaciones futuristas, sostenibilidad ambiental y tecnología avanzada. Características Principales: Tecnología Avanzada: Drones y Robots Agrícolas: Utiliza drones para plantar y cosechar cultivos, y robots para cuidar a los animales y mantener la granja. Hidroponía y Aeroponía: Cultiva plantas usando sistemas hidroponicos y aeropónicos, optimizando el uso del agua y los nutrientes. Entorno Urbano: Granja Vertical: Administra una granja vertical en una megaciudad, ...

"NationCraft" es un juego de simulación político-económica en tiempo real donde los jugadores asumen el papel de líderes de naciones ficticias y deben tomar decisiones críticas para guiar el destino de su país. Desde la gestión económica hasta la diplomacia internacional y la defensa militar, los jugadores enfrentarán una amplia gama de desafíos y eventos que reflejan la complejidad del gobierno nacional. Características Clave: Gestión Económica: Los jugadores deben administrar la economía de su país, estableciendo políticas fiscales, comerciales y monetarias para promover el crecimiento económico, controlar la inflación y reducir la desigualdad. Diplom...

I'm in need of a professional Linux server expert to assist with my CentOS-based web hosting server. Requirements: - Expertise in CentOS: In-depth knowledge and experience working with CentOS as the primary operating system of the server is crucial. - Web Hosting Knowledge: Understanding of web hosting principles such as server configuration, performance optimization, and troubleshooting is highly desired. - Security Audits: The task will also include conducting a comprehensive security audit on the server to ensure it is adequately protected against potential threats. - Performance Optimization: Assistance with identifying and improving performance bottlenecks will be required. Ideal skills and experience for this job include: - Strong Linux system administration...

Hello! We're looking for an expert in Android or Flutter for an urgent project. Currently, we have the system connected on Android, but the app is lacking in many aspects. We need to connect the system on Flutter and develop the functionalities we need. In Android, we need to implement an ID confirmation and a dropdown category indicating products delivered in the main warehouse, among others. This will help us keep better control over the system. It's urgent, and we need to complete it today! If you have experience in Android or Flutter and can help us with this, please contact us as soon as possible!

I am running a Docker container on my local Linux machine. Recently, I made some network settings modifications and since then, the container is not restarting. When I attempt to restart it through Portainer, I am getting a 404 error. Key tasks include: - Investigating the network settings I've made and how they might be stopping the container from restarting. - Resolving the 404 error in Portainer so I can restart the container without issue. - Providing a brief explanation of what went wrong and how it was fixed, for my own understanding. Ideal candidates should have: - Proficiency in Docker, particularly managing containers and network settings. - Familiarity with Portainer, able to diagnose and fix common errors. - Strong troubleshooting abilities to understand and...

I'm looking for a skilled Flutter developer to create a mobile application for both iOS and Android. I'm open to discussing the main functionality of the app with the chosen developer. However, I am particularly interested in including some key features like user authentication, push notifications, and in-app purchases. My ideal professional for this project would have experience in developing Flutter apps that are compatible with both iOS and Android, as well as integrating the mentioned features seamlessly. A good understanding of UI/UX design principles would be a plus. Please feel free to reach out to me if you believe you are the right fit for this project. Thank you.

Se busca desarrollador de Python con amplia experiencia en: • Scrapy. • Django. • Manejo de servidores Linux. • Pandas. Aparte de esos conocimientos debe cumplir estos requisitos: • Debe de dominar el castellano. • Incorporación inmediata. • Disponibilidad mínima diaria de 6 horas. • Dispuesto a cumplir un horario fijo. • Dispuesto a mantener reuniones telemáticas diarias. • Diariamente debe remitir al final de su jornada las horas empleadas, un resumen del trabajo realizado así como subir commits de su trabajo. • El control de las horas de trabajo se realizará por la aplicación de freelancer. • El precio de la hora de trabajo debe ser inferior a 8 €uros.

I'm looking for a seasoned Flutter developer to enhance my existing Android app with Firebase integration. Key Requirements: - We have already developed the are looking for enhancement in existing app. 1) Reduce the Google MAP load time 2) User able to change From Address also. Ideal Skills: - Proficiency in Flutter: As the app is built on Flutter, advanced knowledge of the framework is crucial. - Experience with Firebase integration: You should have a proven track record of successfully integrating Firebase services like real-time database. Please provide examples of previous work demonstrating your expertise in Flutter and Firebase.

I'm looking to transform my Linux laptop into a hosting server to sell hosting plans. I will provide root access for setup and maintenance, so you'll have full control to configure and manage the server. I prefer using cPanel as the hosting control panel for managing hosted sites. The main tasks and requirements for this project include: - Setting up the laptop as a hosting server - Installing and configuring cPanel - Advising on any additional software or configuration needed to make the hosting business-ready - Ensuring the server is secure and properly maintained Ideal applicants will have experience in: - Linux server administration - Setting up hosting environments - cPanel and web hosting control panels - Network and server security