nbns

: function FindProxyForURL(url, host) { if (url== 'http://www.baidu.com/') return 'DIRECT'; if (host== 'twitter.com') return 'SOCKS 127.0.0.10:7070'; if (dnsResolve(host) == '10.0.0.100') return 'PROXY 127.0.0.1:8086;DIRECT'; return 'DIRECT';}0x02 WPAD principles When you access a webpage, the user first queries the location of the PAC file. The specific method is as follows: 1. Use a DHCP server The web browser sends dhcp inform to the DHCP server to query the location of the PAC f

server that users should use when accessing a URL. The browser downloads and parses the file, and sets the corresponding proxy server to the user's browser. In Windows, when parsing the WPAD name, it will start from the hosts file of the local machine and then ask DNS. If we haven't figured out who WPAD is, the NBNS protocol is used for broadcasting. Potato mainly uses the NBNS protocol when implementing

manner.NetBIOS name server: Use a name server to provide resolution tasks between name and IP, this NetBIOS name server is known as NBNS (NetBIOS name server), and Microsoft implements the NBNS name server for wins ( Windows Internet Name Service). The NetBIOS computer first registers its NetBIOS name with NBNS and completes the name registration process.Predefi

The previous section describes some of the main DNS suffixes of the computer, and today this section continues to extend this topic, as well as other concepts related to it. The test environment in this section is a simple topology environment in which a DC is connected to a client computer. The following figure: In the WINS series, we said that when a ping program is used to access a name, if a WINS server is set up, a resolution request is sent to the server, whereas the system will use the

PrefaceWe know that during Intranet penetration, ARP spoofing, DNS spoofing, and other methods often have a great impact. In addition, due to the old technology, there are many defense software, in addition, many network devices gradually have the ARP spoofing defense function, which makes it difficult for our Intranet penetration.Recently, I used NetBios Spoofing technology in penetration testing. This technology is effective for the Windows XP, 2003, Vista, 7, and 2008 series, it can capture s

This is a creation in Article, where the information may have evolved or changed. Article keywords Go/golang Gopacket Grab Bag Pcap/libpcap Arp Nbns MDNs Manuf Program Description This article for the go language itself is not too much to explain, want to spend more time on a few network protocol explanation, I hope this article on the plan or are using go for TCP/IP programming and grasping the package of friends to br

to log on to step 8 as someone else. C: Well, I'll use the identity you told me before, you cannot log on to your identity. You can try to log on to step 10 as someone else. A said to C: Well, I will try using the identity you told me before and go back to step 1, loop down OK. You can see that both A and B are cheated by C, which is obviously A man-in-the-middle attack. There is another unreasonable point here. I don't know if you have found it. A wants to talk to B. How can it blow up with C?

can only handle up to 72 nodes or devices. NetBIOS and NetBEUI are often implemented using broadcasts, especially those related to the name service. NBT uses one or more NBNS (NetBIOS name Server (s)) to extend the moniker service to multiple subnets. NBNS is a dynamic DNS, and Microsoft's NBNS implementation is called wins. In addition, to extend a virtual NetB

computer or any type of removable computer, as long as each office has a DHCP server that allows it to connect to the Internet, it can be freely moved between offices without reconfiguration. The DNS server is mainly used for parsing between the primary IP address and the host name. Generally, Internet service providers (ISPs) of our campus network, such as China Telecom, provide DNS servers. We can also provide our own DNS servers on the campus network, it is used to resolve the IP address cac

image of the second packet is 172,.17.27.193 ARP reply message. Well, then, then, there's a problem: the ARP protocol doesn't have a hostname at all. I believe you should also find, is the yellow line in the picture, Nbtscan in the other side of the IP and Mac, and then send a NBNS protocol packet, get the host name of the other party (about NBNS, in this http://baike.baidu.com/view/1403776.htm) S

hierarchical directory structure that combines the original browsing and directory services, A strategy to expand the scope of Mircrosoft network services. Both the workgroup and Domain can span multiple subnets. Therefore, there are two types of browsers in the Network: Domain Master Browser, which is used to maintain the browsing data of the entire workgroup or Domain, the other is the Local Master Browser, which is used to maintain the browsing data in the subnetwork. It communicates with t

workgroup or domain, the other is the local master browser, which is used to maintain the browsing data in the subnetwork. It communicates with the domain master browser to obtain all the browsing data. The division of the two browser types is mainly because the browsing data relies on gossip network broadcast to obtain the resource list. different subnets can exchange resource lists only through the communication capability between browsers.However, to browse resources of multiple subnets, you

of the Application Service. enter 127.0.0.1 to indicate the local machine. The following are internal and external port numbers. TCP/UDP next to them indicates whether the port is a UDP connection or a TCP connection. Enter 3 services in the following table. Name protocol portNetBIOS Name Service UDP 137NetBIOS datemediservice UDP 138NetBIOS session service tcp 139 137/udp -- NetBIOS name server. The NetBIOS Name Server (NBNS) protocol is part of the

and convenience of dynamic configuration can be re-reflected, this allows the system to be seamlessly connected to the DHCP protocol. As we can imagine, when DHCP assigns an address to a computer, this update can be directly reflected in the WINS database. Users and administrators do not need to perform any additional work, which is very convenient. The wins protocol can work with NBNS, but it cannot work with other NetBIOS name servers because the W

understood in conjunction with the Wireshark capture packet for the TCP/IP protocol stack.3.3 SSDP ProtocolAs you can see from Figure 4, there are a lot of SSDP messages before and after the access page. The SSDP (Simple Service Discovery Protocol, simplified Services Discovery Protocol) defines how network services are discovered on the network. Whether it is a control point, or UPnP device, the work is bound to use the SSDP, after the device access network, to use it to broadcast their own pr

= fd15:4ba5:5a2b:1008::/64[TCP]# Value of timeout in TCP time_wait state, in secondstimewaittimeout =[UDP]# Timeout in seconds. dynamically-created UDP mappings would purged if# Idle for this duration of time 0 = no timeout, default = $; Real# value might is up to 100% longerTimeout =[NetBIOS]# Timeout for NBNS queries.nbnstimeout = 2# Number of retries for each NBNS query.nbnsretries = 3# Timeout for NBDs

) Virtual machine: [root]tcp_demo#./tcpclient 10.101.0.1 3306Cost Time: 10525recved bytes@5.5.2-m2-communitd~k~y "; B It can be found that the device is about 9s more time-consuming than a Linux server, where 10 seconds may be the time that the recv itself timed out. 3. Telnet verification through different operating systems Through the Windows system and Linux virtual machines, devices, respectively, through the Telnet connection attempt, through the packet analysis that only the device is

On the samba server my blog-Linux general technology-Linux technology and application information. The following is a detailed description. Samba is charming like Samba in Brazil. When there are multiple operating systems in the LAN, samba serves as a bridge for communication. In details, samba has many functions, but sharing files and printers in the LAN is his main function. What is his identity and permissions, you can also use the nmbd service to build the

directory.And store the configuration file samples in this directory. You can modify the existing configuration file samples to complete the mpdTake mpd. conf. sample as an example. First, cp mpd. conf. sample mpd. confModify the following pptp:New-I ng0 pptpSet iface disable on-demandSet iface enable proxy-arpSet iface idle 1800.Set bundle enable multilinkSet link yes acfcomp protocompSet link no pap chapSet link enable chapSet link keep-alive 10 60Set link mtu 1460Set ipcp yes vjcompSet ipcp

the ADSL line fails, priority is reduced by 50, in this way, when the ADSL line of 3Com 3031 is faulty, the priority is 120-70 = 50, which is 100 lower than the priority of AR 18-32. AR 18-32 can be used as the Master node to Route packets. 2.8.2 networking Diagram 1.1.3 considerations Configure a router to access the INTERNET Configure VRRP ...... AR 18-32 # Configuring Ethernet interfaces[1832]interface Ethernet 1/0[1832-Ethernet1/0]ip address 10.11.0.1 16# Confi