Cisco Meraki local management interface firmware Installation Vulnerability (CVE-2014-7999)
Release date:Updated on:
Affected Systems:Cisco MerakiDescription:CVE (CAN) ID: CVE-2014-7999
Cisco Meraki is a cloud management solution.
A security vulnerability exists in the local management interface of the Cisco Meraki device. authenticated remote attackers can e
Brief introduction
A connection concentrator is a new feature in the IBM DB2 Universal Database Version 8.0 (DB2 UDB) that handles a large number of inbound connections that have very short transactions but have relatively large delays. This feature has the following advantages:
system resources are not occupied by connections that do not perform any work (idle connections).
Because of multiplexing architectures, agents can switch from one to the o
The following articles mainly describe the basic operating principles of the IBM DB2 connection concentrator. If you are curious about the basic operating principles of the IBM DB2 connection concentrator, the following articles will unveil its secrets. The following is a detailed description of the article. I hope you can learn from it.
1. Basic Principles
Since DB2 V8, the DB2 instance has a feature calle
This article introduces the concept and working principle of DB2 Universal Database proxy, the concept and features of the connection concentrator, and analyzes common problems and proxy Optimization on DB2 connections in detail. For your reference, I hope to help you.
The DB2 agent is a process or thread located on the DB2 server that serves application requests. When an external application connects to a DB2 instance to request access, the DB2 proxy
Pppoe, short for Point-to-Point Protocol over Ethernet, works at the OSI data link layer. pppoe Provides broadcast-type networks (such as Ethernet) multiple hosts are connected to the Remote Access Concentrator (we use a broadband access server for the devices that can currently complete the above functions.1. How pppoe works
The pppoe protocol consists of two phases: the pppoe discovery stage and the pppoe session stage ). The main difference between
The PPPoE protocol has been applied in many places. Therefore, we need to emphasize the importance of learning this protocol. Here, we will systematically learn these basic contents to lay a good foundation for future studies.
I. PPPOE Protocol Introduction
PPPOE, short for Point-to-Point Protocol Over Ethernet, works at the OSI data link layer. PPPOE Provides broadcast-type networks such as Ethernet) multiple hosts are connected to the Remote Access Concent
We all know that PPPoE is a point-to-point transmission protocol in Ethernet. In this article, we will carefully summarize some of the working principles, characteristics, and application content of this protocol, hoping to help you learn it.
I. PPPOE Protocol Introduction
PPPOE, short for Point-to-Point Protocol Over Ethernet, works at the OSI data link layer. PPPOE Provides broadcast-type networks such as Ethernet) multiple hosts are connected to the Remote Access
,num_initagents,max_coordagents,max_connections, Maxcagents. Here is a brief introduction to them:
MAXAGENTS: This parameter is the total number of agents in the current instance, including the coordination agent, the sum of the idle agent and the sub-agent. However, this parameter is no longer used in DB2 V95.
num_poolagents: This parameter is used to control the number of idle agents in the agent pool. When the active agent completes the work Return agent pool becomes an idle agen
Working principle of PPPOE ProtocolThe PPPoE protocol workflow consists of two phases: discovery and session. The discovery phase is stateless to obtain the Ethernet MAC address of the PPPoE end (on the local ADSL device, create a unique PPPoESESSION-ID. After the discovery stage ends, it enters the standard PPP session stage. When a host wants to start a PPPoE session, it must first perform the discovery phase to identify the local Ethernet MAC address and create a PPPoESESSION-ID. In the disco
4.3.2 Working Principle of pppoe ProtocolThe pppoe protocol workflow consists of two phases: discovery and session. The discovery phase is stateless to obtain the Ethernet MAC address of the pppoe end (on the local ADSL device, and create a unique pppoesession_id. After the discovery stage ends, it enters the standard PPP session stage. When a host wants to start a pppoe session, it must first perform the discovery phase to identify the local Ethernet MAC address and create a pppoesession_id. In
I have the opportunity to transfer the development of the IOT Group to this master for the first time. The first project gave me access to smart electric meters. I just got in touch with this stuff and it was confused. Writing this article does not provide technical learning, but I think it is fresh to write some processes, because it was previously B/S.The main devices for this project are: one single table, one three tables, one concentrator, two el
the Internet normally.PPPoE Protocol process analysis process diagramThe PPPoE protocol mainly involves the following processes:
Created with Rapha? L 2.1.2
Customer
Customer
Server
Server
PADI
PADO
PADR
PADS
Descripti
a protocol for the transmission of PPP packets on the Ethernet network (point to point Protocol over Ethernet) in line with the operation of narrowband dial-up Internet (using NAS devices to terminate a user's PPP packet). After the introduction of this protocol, network equipment manufacturers have also launched their own brand of broadband access server (BAS), which can not only support the end of the PPPoE protocol data packets, but also support many other protocols. such as the Huawei Com
in time.
1:nrf51822 layering of Bluetooth protocols
Application layer:Speed Cadence, Blood pressure, heart rate, thermometerBattery, Proximity, HID over GATT
Master protocol layer:GATT GAP ATT SMP l2cap
Control layer:Host Controller Interface (HCI)Link Layer (LL)Physical Layer (PHY)
2.1.1 RoleIn order to create and maintain a BLE connection, the concept of "role" was introduced. A BLE device is not a concentrator role or a peripheral device.Role,
philosophy of narrowband dial-up Internet access ), A Protocol for transmitting PPP data packets Over Ethernet is developed ).
After the launch of this protocol, network equipment manufacturers have also launched their own brands of Broadband Access Server BAS). It not only supports the termination of PPPOE protocol data packets, but also supports many other protocols. For example, Huawei's MA5200 small BAS) and ISN8850 big BAS ).
PPPOE Protocol Introduction
The PPPOE Protocol provides a standa
access ), A Protocol for transmitting PPP data packets Over Ethernet is developed ).
After the launch of this protocol, network equipment manufacturers have also launched their own brands of Broadband Access Server BAS). It not only supports the termination of PPPOE protocol data packets, but also supports many other protocols. For example, Huawei's MA5200 small BAS) and ISN8850 big BAS ).
PPPOE Protocol Introduction
The PPPOE Protocol provides a standard for connecting multiple hosts to a Remo
) below:
Figure 1 Cisco Discovery Protocol
Run the "show CDP neighbors" command to display the table of connected devices. Run "show CDP neighbors details" to expand the table and view the detailed connection information between vswitches (a VLAN matching error exists, right ?), And the detailed information of each device, including its management IP address information.
Figure 2
Now everything goes well, right? But what happens when a Cisco switch connects to another vendor's hardware and
normally.PPPoE Protocol process analysis process diagram
The PPPoE protocol mainly involves the following processes:Created with Rapha rjl 2.1.2 explanation of PADIPADOPADRPADS on the client server
Host broadcast initiation group (PADI). The destination address of the group is the Ethernet broadcast address 0 × ffffffffffff, the CODE field value is 0 × 09, and the SESSION-ID (session id) the field value is 0 × 0000. The PADI group must contain at least one service name type tag (the value of
allows mail access from the internal mail server of the host 172.16.0.4 to the inside interface, and rejects all other traffic from the DMZ network.The following lists the ACL configurations that meet the preceding requirements:Pixfirewall (config) # write terminal...Nameif ethernet0 outside sec0Nameif ethernet1 inside sec100Nameif ethernet2 dmz sec50Nameif ethernet3 partnernet sec40Static (dmz, partnernet) 172.18.0.17 172.16.0.2Static (inside, dmz) 172.16.0.11 10.0.0.4Access-list acl_partner p
We are going to discuss with you the new features of DB2 V9.5 today. We all know that there is a new feature in the DB2 V9.5 database, that is, both MAX_CONNECTIONS and MAX_COORDAGENTS can be set to AUTOMATIC.
If you think the system can withstand all the connections and want to limit the resources consumed by the Coordination proxy, you can set MAX_CONNECTIONS to AUTOMATIC and MAX_COORDAGENTS to a value.
In this case, the system considers that the number of connections to the instance is unlimi
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