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Hello,<br />
<br />
A client accesses an online contact manager database. A week ago, my client could not access their online contact manager's URL. As it turns out, the contact manager admin had blocked my client's IP address because the admin of the contact manager stated that someone from my client's office tried to hack the main contact manager server via SSH. Not just my client's contact cloud database but the entire server the database is sitting on. SSH...I am dealing with an advanced hacker. &nbsp;What I am assuming is someone got into my client's network, either through a phishing scam or the wireless network. The ten employees there are not tech savvy at all, they would not know SSH (you never know though, right?) What should I first do?<br />
<br />
Thanks,<br />
DT
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Hello,

A client accesses an online contact manager database. A week ago, my client could not access their online contact manager's URL. As it turns out, the contact manager admin had blocked my client's IP address because the admin of the contact manager stated that someone from my client's office tried to hack the main contact manager server via SSH. Not just my client's contact cloud database but the entire server the database is sitting on. SSH...I am dealing with an advanced hacker.  What I am assuming is someone got into my client's network, either through a phishing scam or the wireless network. The ten employees there are not tech savvy at all, they would not know SSH (you never know though, right?) What should I first do?

Thanks,
DT

An SSH question

A vulnerability is a weakness which allows an attacker to reduce a system's information assurance. Vulnerability is the intersection of three elements: a system susceptibility or flaw, attacker access to the flaw, and attacker capability to exploit the flaw. To exploit a vulnerability, an attacker must have at least one applicable tool or technique that can connect to a system weakness, known as the attack surface. Vulnerability management is the cyclical practice of identifying, classifying, remediating, and mitigating vulnerabilities. Other vulnerabilities include security risks, security defects and constructs in programming languages that are difficult to use properly.

Vulnerabilities

Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols. The term telnet is also used to refer to the software that implements the client part of the protocol. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.

SSH / Telnet Software

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.

Network Security

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

Networking Protocols

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.