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Why does "move directories" on a NAS take so long?
It's hard to give a firm answer, because it depends. What access protocol are you using, and what operation are you performing? Is it a drag-drop in your GUI? Your NAS does what it's told. It almost certainly implements some sort of internal rename function, that means you don't need to copy data in order to 'move' it. If you do this from the command line, using 'move' or 'mv' (depending on DO

Categories : Networking

Cannot Ping Devices Across Interfaces for Shorewall Single IP Three-interface Firewall on Debian Wheezy
Solution I found an answer to my problem, and it was the network configuration on the dmz. The dmz is on a Dell Power Edge 1950, where I'm running the hardware node on 10.10.1.2/24, and a venet0, virtual node for OpenVZ. I was not concerned about connecting to the OpenVZ nodes just yet, but could not even connect to the hardware node. After modifying the networking information and removing the CI

Categories : Networking

XirSys When do I request new Ice servers?
The Ice Server credentials expire after about 10 seconds. Because you want to keep your XirSys secret token secure (so no one can hack your account's connection allotment), you'll want to make a backend/server side curl request for the ice servers. It's assumed that your app uses its own authentication. I.e., it'll reject any non-authenticated requests to https://yourdomain.com/ajax/get-ice-ser

Categories : Networking

How to measure network pressure?
The answer is very simple: One TCP connection is sufficient to saturate the path between client and server. At least, that is true with standard TCP/IP protocols and standard network devices between the client and server. If you have some devices in the path that are doing some sort of customized processing that is "throttling" individual TCP connections then maybe the answer is different. But

Categories : Networking

Unity Pomelo broadcast message is not received sometimes
try:https://github.com/kaistseo/UnitySocketIO-WebSocketSharp UnitySocketIO using websocket-sharp instead of WebSocket4Net UnitySocketIO is the only usable socket.io client for unity3d, but it's using WebSocket4Net and SuperSocket.ClientEngine as underlying libraries, which are somewhat buggy and unstable. There are times when the MessageReceived event handler is not called, even though the clien

Categories : Networking

How to use create--with between two breed turtle agents?
That error means that you've created some links that have no breed (probably with create-link-with) before creating links with a breed, or vice-versa. If you want to use link breeds, you can never use create-link-with, create-link-to, or create-link-from. You must always use create-<breed>-with, create-<breed>-to, and create-<breed>-from. So, search your code for instances of cr

Categories : Networking

Any minimal source code to measure network latency (client server program)
Sync the time in the two Linux box. Form a data buffer , filling the time stamp in the header & dummy data in the payload. Then send the data over the TCP/UDP socket to the other end & echo the data from the other end. Calculate the elapsed time from the header time stamp which would give you the accurate RTT.

Categories : Networking

Regarding ICMP "Fragmentation needed, DF bit set" or ICMP packet too big message
First of all, let's answer your first question (is ICMP sent over TCP?). ICMP runs directly over IP, as specified in RFC 792: ICMP messages are sent using the basic IP header. This can be a bit confusing as ICMP is classified as a network layer protocol rather than a transport layer protocol but it makes sense when taking into account that it's merely an addition to IP to carry error, routi

Categories : Networking

login to FTP (pure-ftpd) server causing problems
Have you adjusted the SSL auth settings? https://support.winhost.com/kb/a672/how-to-set-up-coreftp-to-use-ftp-over-ssl.aspx, specifically items 12 through 15. 12. In the "Connection" dropdown box, select "AUTH SSL". 13. Under "SSL Options", check "SSL Listings" and "SSL Transfer". Leave "Clear (CCC)" unchecked. 14. Check "Windows SSL". 15. Click "Connect". A box will pop up labeled "Certificate

Categories : Networking

What does the 'x1b' + 47 * '' message sent to an NTP server mean?
"x1b' + 47 * '" represents a data field of 48 bytes. 0x1B followed by 47 times 0. 48 bytes is the size of an NTP UDP packet. The first byte (0x1B) specifies LI, VN, and Mode. RFC 5905 NTP Specification (7.3. Packet Header Variables) specifies the message header as follows: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

Categories : Networking

Can anyone explain why source/dest packet captured by wireshark are in the same subnet ( DNS packet )
your 192.168.1.1 host has a DNS server. So when it receive DNS queries that he cannot resolve locally, he forward to an extenal DNS server ( ISP DNS server). They are 3 types of DNS query: 1. recursive query 2. iterative query 3. inverse queries

Categories : Networking

Why I have this error message while i'm trying to verify my snort configuration
By default, Snort attempts to open up a socket and fails because it does not have admin privileges. Here is a link I found about someone who had the same problem. Run the command with elevated permissions (the Windows equivalent to sudo) to pass.

Categories : Networking

Propagation Loss Models ns-3
The explanation for this behavior due to the different of environmental assumptions of the two models: COST-Hata assumes urban scenario while Friis assumes a free space scenario. In urban scenario the signal attenuates very quickly due to the reflection, refraction and signal blocking due to imaginary buildings and walls. While In free space signal can reach longer distance based on the signal st

Categories : Networking

Access point in client or bridge mode with a different model as remote AP?
Thanks for the answers, they're too much! And for the downvotes too! I ended up installing a personalized firmware (DD-WRT) which gives the specified function after some hardcore configuration.

Categories : Networking

Connectivity between VM's in the same VNET
I had a similar issue not too long ago. I had three servers in the same vnet that were able to communicate via site-to-site VPN to my HQ but could not communicate with one another. After several hours of banging my head against the desk, I ended up just re-building the vnet and connectivity to one another was restored successfully. The vnet router feature had become corrupt and could no longer sen

Categories : Networking

Unity 3D: Send data from client to client
Short of implementing your own RPC system in C#, you'll need to rewrite your code to "bounce" RPCs off of the server. In Unity's networking model, the clients are all connected to the server but not to each other. Any state changes the clients cause is sent to other clients through the server.

Categories : Networking

Clarification regarding working of network layer and transport layer
I hope this helps-: 1)The actual data will be converted to packets at the network layer and the job is done by the OS of the client 2)The address of the default router(default gateway) is specified on your client(in your case your pc).You can open your command prompt and type route print to check what all routes are present.The route with destination as 0.0.0.0 and subnet mask 0.0.0.0 will be yo

Categories : Networking

How to configure haproxy port range to range one by one?
You have to remove the port range from the server definition. The haproxy documentation shows that the same port from the source is used for the destination. listen ftp-proxy-server 10.0.1.1:20100-20199 mode tcp server ftp-server 172.126.1.1

Categories : Networking

What are some IP based protocols that don't use ports like TCP or UDP do?
Cisco has a list of protocols their routers support that are on top of IP with no TCP necessary. These are usually not supported directly by hosts, and are usually used by the infrastructure for network maintenance ... http://www.cisco.com/c/en/us/td/docs/cable/serv_exch/serv_control/broadband_app/apa/2-0-0/user/guide/APADC_UG/Protocols.html#wp1075138 HOPOPT ICMP IGMP GGP IP ST CBT EGP IGP BBN-

Categories : Networking

Network connectivity: 2 nodes belonging in different subnets but having the same Class C subnet masks
Your setup will never work like that. Why is your printer in a different network (this makes no sense)? Do the following to make it work: Change the IP on the printer to an IP in the network of 192.168.0.0/24 (e.g. 192.168.0.60 - 255.255.255.0 - DG remains the same) As your printer is now in the same network as your computer, you should be able to use it. Considering all the necessary software

Categories : Networking

NetSim - distance between the sensor nodes and the various agents?
You can go to the source code (NetSim_Install_Directory -> src -> simulation -> Zigbee) and check the file sensor.c, which has exactly what you are asking for. The code is reproduced below - _declspec(dllexport)int fn_NetSim_Zigbee_SensorEvent(int nSensorLoop,NETSIM_ID nGlobalPANCoordinatorId,AGENT** pstruAgent,SENSORS* pstru_Sensor,METRICS** pstruMetrics,NetSim_EVENTDETAILS* pstruEventDetails,I

Categories : Networking

Identify network adapter only with MAC Adress
No, the MAC Address is simply a unique Identifier for each network adapter. You can think of it as a unique random number coded directly into the networking hardware, so that it can never change. You can figure out the vendor, because "blocks" of MAC addresses are assigned to each vendor, in order to ensure that no one gets a card with a duplicate address. To which models the addresses are assigne

Categories : Networking

Maximum number of communication in 5 ports router
I could only figure out that the question is based on mathematics and has nothing to do with the networking and probability tags! As you mentioned In each port the input cannot communicate with other inputs and cannot communicate with the output in the same ports. So, assuming one port communicating via input, the port can communicate with only 4 output of other ports and not with the 4 i

Categories : Networking

When i configure the DYNDNS account in my local router it is not work
First: go to http://www.canyouseeme.org/ and see if the port is even open. If not, then forget all the other stuff and try to get this open by configuring Virtual Servers. Keep in mind that the Routers MGMT port is on port 80 - change the Router port if you are keeping the DVR on port 80. Second: Once you know the port is in fact open, try to access this DVR by the IP address. If that doesn't

Categories : Networking

clarification regarding "connection oriented"
In case of TCP, 'connection-oriented service' means having a session established in the transport layer. In case of TCP, data transmission is guaranteed. You have acknowledgements in TCP. These are some reasons why it is called 'connection-oriented'.

Categories : Networking

How to test/reproduce bad network behavior?
I guess http://henrydu.com/blog/how-to/simulate-a-slow-link-by-linux-bridge-123.html should work on your mac. It uses traffic control with ifconfig, something you might want to google for.

Categories : Networking

what can be the possible length of mask in networking
I've seen /32 routes (host routes) commonly used, and /0 routes (default routes) commonly used, so the practical maxima and minima are the same as the theoretical maxima and minima, i.e. /32 and /0.

Categories : Networking

Hadoop Customize Input Distribution on Nodes
To identify packets according to tcp-ip protocols you can use pcap library (jnetpcap) which has function PcapPacket.hasHeader(protocol instance) where protocol object should be instantiated before calling hasHeader function e.g. Tcp tcp = new Tcp(); Udp udp = new Udp(); PcapPacket packet = //got from somewhere if(packet.hasHeader(tcp){      //packet is tcp   &

Categories : Networking

Send packets larger than 64K in TCP
The IP packet format has only 16 bit for the size of the packet, so you will not be able to create a packet with a size larger than 64k. See http://en.wikipedia.org/wiki/IPv4#Total_Length. Since TCP uses IP as the lower layer this limit applies here too.

Categories : Networking

basic how-to-use of SSH
ssh -i /path/to/identityfile -p 12345 someusername@some.ip.add.ress should work It seems that you already have account. No. You cannot share application via SSH

Categories : Networking

wireless communication with lifx virtual bulb
The bulb uses your local wifi, so it is basically using the same protocols you are using to browse the web. More technically speaking it uses UDP (at the time of this writing). It works like this: When you use your LIFX bulb for the first time, you have to use your phone and tell the bulb to connect to your wifi. The bulb connects and get an IP address. Now anyone else on the same wifi network (b

Categories : Networking

Is it possible to change a flow of ZMQ messages with routing to a physical address?
Yes, it is, but there are few caveats in an otherwise logical question ZeroMQ has no problem to pass any node's physical address encapsulated inside a message-payload, however there are reasons, why this is not solving your wish so straightforward as it might have looked for a first sight. ZeroMQ is a powerfull framework of smart, scaleable, formal patterns, atop of which user builds her/his ow

Categories : Networking

How do I compute the DNS server response time?
It should be within a second, including the connection establishment, network latency, and processing at the DNS server. If you are querying a recursive DNS server, then be aware that the response time will differ based on the state of that server's cache. If you query something that is already with the server, response will be faster. Try querying a non existent domain to factor in the recursion

Categories : Networking

Looking at protocols on non default ports in Microsoft Message Analyzer
Rob, have you had any luck on this? I'm trying to accomplish the same thing and this post is the closest I've come to an answer on this issue. I'm probably going to start reverse engineering MMA this week but was hoping I wouldn't have to put in this level of work for what should be a simple answer.

Categories : Networking

Debian 7 and network card
Bash it! #!/bin/bash ifconfig eth0 down ifconfig eth1 up ifconfig eth1 10.1.1.1 ;you may put the mask This is a simple and static way. name it eth0Down you make a chmod a+x eth0Down on it then run it in sudo. I don't get why people put you -2, there's no stupid questions. And this one can be quite debated. Comment if you would like more hints for your project!

Categories : Networking

Lost Packets And Duplicate Packets Scenario in Three way Hand-shaking
What happen if SYN lost? It is retransmitted by the client if it hasn't been acknowledged by the server with a SYN-ACK. What happen if SYN+ACK lost? The SYN is retransmitted by the client if it hasn't been acknowledged by the server with a SYN-ACK. What happen if ACK lost? The SYN-ACK is retransmitted by the server if it hasn't been acknowledged by the client wit

Categories : Networking

How to Enable SOCKS to a SSH supported Server
SSH supports creating a SOCKS tunnel with the -D option. See http://wiki.vpslink.com/Instant_SOCKS_Proxy_over_SSH for for more details on how to use it. But, this will only be a SOCKS4, not a SOCKS5 tunnel, which means that DNS lookups still will be done outside the tunnel.

Categories : Networking

How does luasocket's settimeout() work?
The code works for me as expected (Windows, LuaJIT 2.0.2, luasocket 3.0-rc1); I tested on the following standalone script: local socket = require "socket" local server = assert(socket.bind("*", 3333)) local client = server:accept() print("accepted connection; waiting for data...") client:settimeout(10) local start = os.time() local line, err, partial = client:receive("*l") if line then print(("

Categories : Networking

what port-range will be chosen when bind9 is forwarding a dns query?
Off topic, but this is all documented: [ use-v4-udp-ports { port_list }; ] [ avoid-v4-udp-ports { port_list }; ] [ use-v6-udp-ports { port_list }; ] [ avoid-v6-udp-ports { port_list }; ]

Categories : Networking




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