Oracle Technology Network is the ultimate, complete, and authoritative source of technical information and learning about Java. Internet, networking and IT security news and headlines from around the web. Its cake versus ice cream for Splatoon 2s first Splatfest and were streaming all the fun live on our Twitch channel. Come and join the mayhemSearch Irongeek. Help Irongeek. com pay for bandwidth and research equipment Hacking Network Printers Mostly HP Jet. Directs, but a little info on the. Ricoh Savins Hacking Network PrintersMostly HP Jet. Directs, but a little info on the Ricoh SavinsBy Adrian Irongeek Crenshaw. Hack a printer you say, what kind of toner have you. Irongeek Well, Im here to tell you, theres more that can be done. Best-Hacking-EBooks.jpg' alt='Program Network Security Hacking Books Collection' title='Program Network Security Hacking Books Collection' />In the olden. Operating Systems, storage and full IP stacks. Wireless Hacking Tools are those hacking tools which are used to hack into a wireless network which is usually more susceptible to security threats. PRISM is a code name for a program under which the United States National Security Agency NSA collects internet communications from at least nine major US internet. Spinning-Value-Bubble-Ethical-Hacking.gif' alt='Program Network Security Hacking Books Collection' title='Program Network Security Hacking Books Collection' />This article will attempt to point out some of the more interesting things that. Some of this article may seem a little Black hat as it concentrates more on the. However I feel this information will be useful. If you want more advice on how to lock. A guide from HP is linked. If nothing else, this article. For my tests I will mostly be using a Hewlett Packard Laser. Jet 4. 10. 0 MFP. Novel Lupus Pdf there. FaxPrinterCopierScanner, an HP Jet. Direct 1. 70x and a HP Jet. Direct 3. 00. X J3. A but I will. bit on the Ricoh Savin series of printers lest you think HPs are the only. Much of this article. It. all started as a project for Droops Infonomicon TV and it snowballed from there. Bear with me as I clean it up and other folks send. The most recent version of this. Table of Contents Intro to the concepts        There are several TLAs Three letter. I will be using though out this article so I best get them out of the. Printer Control Language, which was developed by HP and has become one. Another page description language you. Post. Script. PS which was designed by Adobe to allow for more complicated things to be printed from a. PJL Printer Job Language is an. PCL that can tell a printer what to do, from changing device. There are also three. Heres a table. with some of the pertinent information about each protocol Name. Meaning. Port. LPDLine Printer Daemon protocol. IPPaka. Berkeley printing system. Internet Printing Protocol. Jet. Directaka. App. Socketaka. Rawaka. PDL datastream  9. Since my focus is on. Soal Psikotes Bank Mandiri. Jet. Directs I will mostly be talking about and using App. SocketPDL datastream, but. Jet. Directs can also work with IPP and LPD, and many non HP made. App. Socket, you should be aware of the existence of all. Theres are also network printers that use the IPX, Appletalk and SMB. Savins for example protocols to communicate. Ill not cover IPX and. Appletalk because of my lack of experience with them, maybe someone else who. SMB I may try to cover at a later time. Now that the formalities are out of the way, lets start playing. Diagnostics page        The pictures above. Jet. Direct 1. 70x box. Notice the picture on the right on the. Pressing. this button on most Jet. Direct boxes will print out a diagnostic page listing. IP setting for the Jet. Direct box. If your printer has an. Jet. Direct card you will have to negotiate the menus to find out how to. Once you hit the test button the printer should. MAC address,  IP. Address, subnet mask, default gateway, firmware revision and some general statistics. The IPhost. will be especially  useful if you want to bypass print quota software by. IP printing on your Windows or Linux box. If you dont have. Jet. Direct box you can still find its IP or host name by. Windows box you have access to. As you can see by the. Jet. Direct box is npib. Sometimes you will see a port listed as something like IP1. Jet. Directs IP. You can pretty much use a host. IP interchangeably on your LAN, and if the host name has a fully. Internet. as well. If you dont have. Jet. Direct box, or if your PC is not connected to one, dont despair. In next few sections I will describe how to find these printers on the LANInternet. Nmap and Jet. Admin. Stupid Printer Tricks. I called this section Stupid Printer Tricks because while. RAWApp. Sock protocol that listens on port 9. Jet. Directs and most other. Try this, find your printers IP using the. Diagnostics page then web surf to   http your printers ip 9. The 9. 10. 0 at the end is there to tell your browser to connect on port 9. When you try to establish the connection you should notice that the browser does. Click the stop button on your browser to tell it to stop trying to. Depending on what browser you use. Firefox. Internet Exploiter. GET HTTP1. 1. Host tux 9. User Agent Mozilla5. Windows U Windows NT 5. US rv 1. 8. 0. 1. Gecko2. 00. 60. 11. Firefox1. 5. 0. 1. Accept textxml,applicationxml,applicationxhtmlxml,texthtml q0. Accept Language en us,en q0. Accept Encoding gzip,deflate. Accept Charset ISO 8. Keep Alive 3. 00. Connection keep alive. GET HTTP1. 1. Accept imagegif, imagex xbitmap, imagejpeg, imagepjpeg. Accept Language en us. Accept Encoding gzip, deflate. User Agent Mozilla4. MSIE 6. 0 Windows NT 5. SV1. NET CLR. 1. NET CLR 2. Host test 9. 10. Connection Keep Alive        You see, anything. The two texts you see above are HTTP get requests for the root document of. The network printer does not understand this and just tries to print. Another thing you can try is telneting to port 9. IP is 1. 92. 1. 68. Irongeek. telnet 1. Trying 1. 92. 1. 68. Connected to 1. 92. Escape character is. Connection closed. Irongeek         You should now see a. The represents the. Control key and the bracket at the same time. The above. example was done in nix, but the same commands should work in Windows. Keep in. mind you may not see all of what you type in the parts in red unless you have. Windows.         There are exceptions. This trick. for which there will be more details given later, should change LCD display to. Its not supported on all printers, but If you have an HP it. Ive got to thank. Dipswitch for pointing out that you dont need fancy tools or code to do it. With Telnet Irongeek. PJL RDYMSG DISPLAYSome Textquit. Irongeek Or Netcat Irongeek. PJL RDYMSG DISPLAYSome Text. Irongeek Jet. Direct password notes        Most of the time. Jet. Directs password options on, but if they do they quickly. Download Autocad Total Length Command Software. If you are using a. Jet. Direct box like one of the following 6. N J6. 05. 8A6. 15. N J6. 05. 7A6. 10. N J4. 16. 9A, J4. A3. 80. X J6. 06. A3. 10. X J6. 03. A,2. 50. M J6. 04. A7. 5XJ6. 03. 5Aor an HP printer with and internal Jet. Direct card like HP Laser. Jet 4. 10. 0 series. HP Laser. Jet 8. 15. HP Laser. Jet 9. 00. HP Color Laser. Jet 4. HP Color Laser. Jet 4. HP Designjet 5. 00. HP Business Inkjet 2. Web interface. and Jet. Admin software are the same. If you telnet in you will be prompted for a. The user names root, admin, administrator and supervisor are. If you are using an. Jet. Direct box like one of the following 6. N J3. 11. 0A, J3. A, J3. 11. 2A. J3. A4. 00. N J4. 10. A, J4. 10. 5A, J4. A3. 00. X5. 00. X1. XJ3. 29. 6A, J4. B, J3. A, J3. A, 3. 26. 5A, J4. B, J3. 25. 8Bthen things are more confusing. First, if you telnet in you will. If you setup a password for the. In other words there are two passwords on at least some Jet. Direct boxes. one for telneting into it and one for the web interfaceJet. Admin software. Telnet. WebJet. Admin passwords are not. Telnet passwords. WebJet. Admin passwords to 1. Just so you. know, Hijetter discussed later may report the password as disabled even if both. The Web interface and. Jet. Admin use SNMP Simple. Network Management Protocol to control the Jet. Direct boxes and require that you. Ive read that other third party SNMP configuration utilities. Jet. Direct anyway. Network Design Firewall, IDSIPSIntroduction. There are many different types of devices and mechanisms within the security environment to provide a layered approach of defense so that if an attacker is able to bypass one layer, another layer stands in the way to protect the network. Two of the most popular and significant tools used to secure networks are firewalls and intrusion detection systems. The rudimentary functionality of a firewall is to screen network traffic for the purpose of preventing unauthorized access between computer networks. In this article, we will examine the various types of firewalls and intrusion detection systems, as well as understand the architecture behind these technologies. We will touch attack indications and the countermeasures that should be applied in order to secure the network from breach. This article describes the importance of intrusion detection and prevention, and why they must be a part of every network security administrators defense plan. Ethical Hacking Training Resources Info. SecWhat is a Firewall A firewall is a device installed between the internal network of an organization and the rest of the network. It is designed to forward some packets and filter others. For example, a firewall may filter all incoming packets destined for a specific host or a specific server such as HTTP or it can be used to deny access to a specific host or a service in the organization. The following image depicts a firewall installation in the network. Firewalls are a set of tools that monitors the flow of traffic between networks. Placed at the network level and working closely with a router, it filters all network packets to determine whether or not to forward them towards their destinations. Working Architecture. A firewall is often installed away from the rest of the network so that no incoming requests get directly to the private network resource. If it is configured properly, systems on one side of the firewall are protected from systems on the other side. Firewalls generally filter traffic based on two methodologies A firewall can allow any traffic except what is specified as restricted. It relies on the type of firewall used, the source, the destination addresses, and the ports. A firewall can deny any traffic that does not meet the specific criteria based on the network layer on which the firewall operates. The type of criteria used to determine whether traffic should be allowed through varies from one type to another. A firewall may be concerned with the type of traffic or with source or destination addresses and ports. A firewall may also use complex rules based on analyzing the application data to determine if the traffic should be allowed through. Firewall Pros and Cons. Every security device has advantages and disadvantages and firewalls are no different. If we applied strict defensive mechanisms into our network to protect it from breach, then it might be possible that even our legitimate communication could malfunction, or if we allow entire protocol communications into our network, then it can be easily hacked by malicious users. So, we should maintain a balance between strictly coupled and loosely coupled functionalities. Advantage. A firewall is an intrusion detection mechanism. Firewalls are specific to an organizations security policy. The settings of firewalls can be altered to make pertinent modification to the firewall functionality. Firewalls can be configured to bar incoming traffic to POP and SNMP and to enable email access. Firewalls can also block email services to secure against spam. Firewalls can be used to restrict access to specific services. For example, the firewall can grant public access to the web server but prevent access to the telnet and the other non public daemons. Firewall verifies the incoming and outgoing traffic against firewall rules. It acts as a router in moving data between networks. Firewalls are excellent auditors. Given plenty of disk or remote logging capabilities, they can log any and all traffic that passes through. Disadvantage. A firewall cant prevent revealing sensitive information through social engineering. Firewall cant protect against what has been authorized. Firewalls permit normal communications of approved applications, but if those applications themselves have flaws, a firewall will not stop the attack because to the firewall, the communication is authorized. Firewalls are only as effective as the rules they are configured to enforce. Firewalls cant stop attacks if the traffic does not pass through them. Firewalls also cant secure against tunneling attempts. Applications that are secure can be Trojaned. Tunneling bad things over HTTP, SMTP and other protocols is quite simple and easily demonstrated. The way a firewall provides greater protection relies on the firewall itself, and on the policies that are configured on it. The main firewall technologies available today are Hardware Firewall. Software Firewall. Packet Filter Firewall. Proxy Firewall. Application Gateways. Circuit Level Gateways. Stateful Packet Inspection SPIHardware Firewall. A hardware firewall is preferred when a firewall is required on more than one machine. Hardware firewall provides an additional layer of security to the physical network. The disadvantage of this approach is that if one firewall is compromised, all the machines that it serves are vulnerable. Software Firewall. A software firewall is a second layer of security and secures the network from malware, worms and viruses, and email attachments. It looks like any other program and can be customized based on network requirements. Software firewall can be customized to include antivirus programs and to block sites and images. Packet Filtering Firewall. Packet Filtering firewall filters at the network or transport layer. It provides network security by filtering network communications based on the information contained in the TCPIP header of each packet. The firewall examines these headers and uses the information to decide whether to accept and route the packets along to their destinations or deny the packet by dropping them. A Packet Filter firewall is a router that uses a filtering table to decide which packets must be discarded. Packet Filtering makes decisions based upon the following header information The Source IP address. The Destination IP address. The Network protocol in use TCP ,ICMP or UDPThe TCP or UDP source port. The TCP or UDP destination port. If the protocol is ICMP, then its message type. Proxy Firewall. The Packet Filter firewall is based on information available in the network and transport layer header. However, sometimes we need to filter a message based on the information available in the message itself at the application layer. For example, assume that an organization only allows those users who have previously established business relations with the company, then access to other users must be blocked. In this case, Packet Filter firewall is not feasible because it cant distinguish between different packets arriving at TCP port 8. Here proxy firewall came into light as a solution install a proxy computer between the customer and the corporation computer. When the user client process sends a message, the proxy firewall runs a server process to receive the request. The server opens the packet at the application level and confirms whether the request is legitimate or not.