Network setup and troubleshooting

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1 ACTi Knowledge Base Category: Application Note Sub-category: Application Model: All Firmware: All Software: NVR Published: 2009/12/21 Reviewed: 2010/06/10 Network setup and troubleshooting Contents Introduction Server-client concept Network protocol, IP address, and port number Port forwarding Port forwarding troubleshooting How to make an NVR Server on-line NVR troubleshooting of WAN setup NVR Connection Type setting Introduction It is very convenient to users that ACTi NVR Server and IP devices provide remote access from a web client either over LAN or WAN. In this document, we would like to discuss about how to setup and configure your IP devices, NVR Servers, as well as network equipments (switches or routers) and PCs (web clients) for video streaming and remote control. Server-client concept In the world of networking, the server-client architecture is one of the basic networking concepts that it requires a content provider and a receiver. A content provider may be an IP camera, video server, or NVR Server. Regarding these content providers, a client may be a streaming player software, video decoder, or browser. Having this concept in mind, if we consider an IP device as a content provider, an NVR Server could be a Client, since it receives multimedia content from its Server (a camera) and then make use of these data, in terms of video streaming forwarding, video footage recording, or video playback uploading. 1

2 Network protocol, IP address, and port number When a network node would like to communicate with another network node, what will they need? In networking terms, there are network protocols, IP addresses, and port numbers combining into URLs (Uniform Resource Locators). A legal URL is always unique, complying with the networking standards. Is this idea of networking too abstract? Let s think this way. Standard network protocols are like airway, railway, subway, and highway. To travel on these systems, carriers must follow the regulations as protocols. IP addresses are like international airports, train stations, and turnpike interchanges. Each international airport has a unique ID as well as train stations and turnpike interchanges within their own systems do. In this way, carriers can easily identify where they come from and where they are heading to. Port numbers are like airport terminals, train station exits, and interchange exits. So if you tell me that you are air traveling to NYC, I will probably pick you up at JFK, Terminal 3. All ACTi devices support Hypertext Transfer Protocol (HTTP). The default IP address and port are and 80. So the default URL of each ACTi device is Please keep in mind that default ports of each standard protocol are often omitted, therefore if users connect to the connection will be made to the destination s port 80 automatically. Port forwarding Each Network Internet Card (NIC) has ports, range from 0 through Some of these ports have been assigned to standardized protocols, for example, HTTP (80), FTP (21), and RTSP (554). If one PC is running two HTTP services at the same time, one of the services must change its HTTP port to a non-standardized port number, for example, port Otherwise, port conflicts would occur. For example, a PC may run an IIS Server for ACTi NVR Server on a Windows system while running an Apache web server for PHP database access. If IIS Server obtains and binds to port 80 earlier then Apache Server which doesn t bind itself to another port for HTTP services (and probably doesn t prompt error messages to warn users), then when a connection is made for Apache Server s home directory via 80 port, Apache Server will not receive anything at all. This kind of problems happens quite frequently when users work on their routers to carry out port forwarding. The concept of port forwarding (also called port mapping) is to open a port in a router or firewall residing in a private network in order to let a party from the outside world contact a network node or access to its services inside, and to make two-way communications easier. 2

3 For example, opening ports for ACTi NVR services, in terms of control signals, video streaming, and standard HTTP connections; and opening ports for each ACTi devices, users may interact with their NVR Server and IP devices over the Internet as well as in the a private network. The default ports (for basic functions) of control, streaming, and HTTP of ACTi products are 6001, 6002, and 80. As we mentioned in Server-client concept, each device or NVR Server is a Server while providing contents, therefore, Server should publish its ports for Clients to connect. That is the reason why users MUST configure each and every one of these Servers and their ports in their routers. Here is a sample of routing table: Routing Table LAN Router User IE Port forwarding my.cam.net your.pc.net HTTP HTTPS Cam A Control Streaming Connect to Cam A my.cam.net:10080 Multicast RTSP HTTP HTTPS Cam B Control Streaming Connect to Cam B my.cam.net:20080 Multicast RTSP HTTP Control NVR Server A Streaming Multicast Connect to NVR my.cam.net:30080 Server A RTSP Notice 1. If a router s default HTTP port is 80, and users would like to use HTTP port 80 in NVR Server, assign router s port to another number. a. When you use IE to connect to my.cam.net:80, it is redirected to NVR Server PC. b. When you connect to my.cam.net:8080, it is redirected to your router. 2. For each node, they must have a unique set of ports. 3

4 a. In the router, you need to configure all sets of ports for port forwarding. b. In NVR, Media Source Information of each channel should be in accordance with the device you set via Web Configurator. To synchronize NVR with devices, please always click on "Get Device Setting" or refresh NVR programs. 3. Ports highlighted in yellow MUST be mapped in your router. 4. No blocking on all these ports at both Server and Client site, Here is a quick check list for troubleshooting in users router: Port Forwarding Check list Ports MUST be set in Check Web Configure-> Setting-> Host setting-> HTTP Port Cam Web Configure-> Setting-> Video Setting-> Video Control Port Web Configure-> Setting-> Video Setting-> Video Streaming port ActiveSetup-> Camera Setup-> HTTP port NVR ActiveSetup-> Camera Setup-> NVR Control Port ActiveSetup-> Camera Setup-> NVR Streaming Port For cam HTTP For cam control Router For cam streaming For NVR HTTP For NVR control For NVR streaming 4

5 Port forwarding troubleshooting Case 1: I can log in Web Configurator over WAN, but I cannot view video. 1. Suppose Cam has http port: 10080, Video Control port: 16001, Video Stream port: And connection type is TCP. 2. In your router, you ve done port forwarding for 10080, which is working, since you can connect to Web Configurator. 3. In your router, you ll need to do port forwarding for 16001, which may be mapped to router s port say In your router, you ll need to do port forwarding as well, say mapped to router s port Please repeat step 2 thru 4, to map cam ports to router ports in the same way. Please notice that, for each pair of port forwarding, they must be unique (both on router and IP devices). See the table below: So since cam 1 uses and 16002, then cam 2 must set the Control and Stream port to some values other then and Routing Table LAN Router User IE Port forwarding my.cam.net your.pc.net HTTP HTTPS Cam 1 Control Streaming Multicast RTSP HTTP HTTPS Cam 2 Control Streaming Multicast RTSP HTTP Connect to Cam 1 Connect to Cam 2 my.cam.net:100 my.cam.net:101 Control NVR Server A Streaming Multicast Connect to NVR Server my.cam.net:30080 A RTSP

6 6. Suggestion of verification of whether your setup works, please run command prompt, and use command: netstat n 10 The command is showing connections from your PC. In the first figure, I started to run the command, and was trying to connect to an IP device: In the second fig, I succeeded in establishing connection with cam s control and stream port (2011 and 3011). 6

7 So please remember that for one IP device, you will need to map at least 3 ports: http, control, and stream. How to make an NVR Server on-line Suppose users have done port forwarding successfully as in the previous chapters on IP devices, then to make an NVR Server accessible on the Internet is the same thing. Let s continue with the routing table: Routing Table LAN Router User IE Port forwarding my.cam.net your.pc.net HTTP Control NVR Server A Streaming Multicast Connect to NVR Server my.cam.net:30080 A RTSP Please go to the IIS setup window, and set HTTP port to Restart the Web Site service of NVR. 3. Please go to ActiveSetup-> Setup System-> System NVR Streaming Port: NVR Control Port: IIS HTTP port:

8 4. Please go to Camera page to set Camera IP or NVR IP for WAN access. If users would like to get video stream directly from an IP device, then please set Camera IP to a public IP. If users would like to get video stream from NVR, then please set NVR IP to a public IP. NVR troubleshooting of WAN setup Given a channel which can display live view. 8

9 The original setting of the channel with Connection Type set to Get Video from Device. So the result of Get Device Setting would fail. We trace connections and would see the connection was not established due to a private IP address can never be reached outside its LAN. 9

10 The original setting of the channel with Connection Type set to Get Video from NVR. The result would be failed as well. However, if you use an public IP, Get Device Setting will bring out the IP device setting and live view. Then the connection between an NVR Server and a remote web client is successfully established. 10

11 NVR Connection Type setting In NVR v2.2 SP3, the Connection Type has three types: Get Video from Device, Get Video from NVR, and Get Video from Current NVR. Users may refer to the NVR user manual described as the following: The main idea of Connection Type is to provide three different ways to stream video. The first type is to get a stream directly from an IP device. The consideration of this type is multiple streams streamed out from a single IP device will cause the device over loading. The second type is to get a stream from a remote NVR Server. The remote server may be over LAN or WAN. The third type is to get stream from the local NVR Server in which default localhost and related info will be in use without further configuration. Please keep in mind that Connection Type is only to stream video, there is no any other info from a remote site will be retrieved. The differences between Get Video from NVR and Get Video from Current NVR are: 1. Get Video from NVR: Users need to fill in a remote NVR Server IP info. 2. Get Video from Current NVR: default (localhost) IP info is in use. If a user would like to make an NVR Server on-line, please make sure localhost will not be in use, meaning the user must set the NVR Server to public IP. Users may be confused with NVR Server and Workstation. For an NVR Server, it hosts the streaming service, so it is the Server that gives out (duplicates) streams to web clients. When a user logs in an NVR Server, he/she IS a web client to the Server itself. When a user logs in an NVR Server from a remote PC, you are still a web client. Web clients talk to NVR Server via 11

12 HTTP port (80), and the default Control and Stream port is 6001 and Example Environment setup: 1. My PC was hosting a NVR Server. 2. Another PC was hosting a NVR Server as well. 3. I connected to via IE, and selected Get Video from NVR A. Control port was 6001, and Stream port was B. I used Wireshark to trace packets from and port C. The result was no packet directed to PC I traced packets from (my PC) and port A. There were traffics on port 6001 and B. I captured packets on these two ports. 12

13 5. I connected to via IE, and selected Get Video from Current NVR A. I traced on IP (the camera) and there was no packet. B. I traced on IP , and there were packets over port 6001 and

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