Networking is the art of connecting two or more devices together so that they can communicate with each other.

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Network printer outside from his router not presented on network

I'm working in an office, which has a messy network built by many people before me. Just to clarify: I far not understand networks, this one either. I have a room, where arrived a new network ...
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0answers
83 views

Firebird can't connect to host

I'm new in FirebirdSQL. I can't connect into my host address whereas it can connect to localhost successfully. It prompt show errors like this: SQL> connect ...
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2answers
3k views

Can't see computers in workgroup, but pinging works

I have a problem with configuration my home network. I using Windows 7, Windows XP and Dlink DIR-300 for create home network. I ping all of my computer and ping works, but I don't see computer in ...
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1answer
545 views

retransmission of lost TCP segment

What will happen in the following scenario (assume the connection is already established): (stack A) send 10 byte data (stack B) send ACK for 10 byte data (stack B) send 200 byte data (stack B) send ...
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5answers
8k views

Bridging Wifi to Ethernet on Ubuntu not working

When running Windows I was able to bridge my wifi connect through my laptops Ethernet connection so a range of ethernet only devices could piggy back off my wifi (Raspberry Pi, Xbox etc etc). I am ...
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2answers
34 views

Multiple network interfaces with the same local IP address

I run several VPN connections that give me different external IP addresses. But these VPN servers often give me the same local IP address. So I can end up with the following configuration: eth0 ...
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1answer
776 views

What is the purpose of the network id?

I know that for addresses like e.g. 192.168.17.5 with 255.255.255.0 subnet mask, address 192.168.17.0 is the network id and 192.168.17.255 is the broadcast address and that valid hosts are from ...
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5answers
8k views

Can you have a class C IP address with a subnet mask of 255.255.0.0?

Can you have a class C IP address with a subnet mask of 255.255.0.0? What happens when you have a setting like this?
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1answer
2k views

Network connection failed :unknown reason:

Im on RHEL, and found that my VPN stopped working. I discovered that I could use the command line utility, nmcli, to try to get more info about what was happening. However, Im finding that the ...
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2answers
4k views

Configuring Intranet and Internet on one PC

I have PC with two NICs one is connected to Internet and another is connected to Intranet. Intranet settings are 10.35.134.129 255.0.0.0 10.35.134.1 Internet settings are 192.168.1.15 ...
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1answer
994 views

Why is byte stuffing preferred to use with PPP?

I read that PPP can use both bit and byte stuffing, but I can't think of any reason why byte stuffing is preffered. Can you?
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2answers
4k views

My laptop can't access files from my desktop

Here is my problem. I have a desktop, a laptop and a typical router. The desktop is connected through wire and I connected my laptop wirelessly. I can access my desktop files through my laptop, but I ...
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2answers
57 views

Why do some domain names contain numbers and strange words?

Here are some examples which appear under the foreign address field when I run netstat (on Win7): lhr08s06-in-e11 edge-star-shw-12-erc3 Why don't these look like standard internet domain names (eg. ...
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1answer
12 views

NetworkManager reaches outside but network service faiils

I am having IP 172.16.20.201 My proxy is on 172.16.15.8 when using NetworkManager I can ping 172.16.15.8 with no issues. Once I stop NetworkManager and start network service and do service network ...
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3answers
4k views

Can't ping localhost/or reach locally hosted domain

I can't reach a locally hosted domain, and in testing I have discovered I can't ping localhost or the actual IP either. OS is Windows7 64bit, Pro. DNS works, I can ping others on my network, they ...
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1answer
15 views

Is it normal for uploads on ADSL to make the connection unusable (> 4000ms latency)?

I have an ongoing saga with my internet connection; where the latency periodically goes through the roof. In most cases, this seems to coincide with something uploading data. I'm not having a lot of ...
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2answers
2k views

No network connection through either wired or wireless adapter

I had my desktop windows 7 computer turned off for several days. After powering back up, it wants to apply "critical" windows updates, so I allowed update and the reboot. Network connections did not ...
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0answers
19 views

Share network from windows 8.1 to windows 8.1

I'm trying to share network via "Connectify" from Windows 8.1 notebook to another Windows 8.1 notebook. And the problem is that connection is limited. Order isn't matter. But third notebook with ...
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2answers
3k views

DD-WRT and Chromecast: default WLAN to LAN bridge blocks UDP?

I have DD-WRT running in gateway mode on a DIR-615 I1. I've updated to the newest available build. Chromecast is a wireless-only device, for those unfamiliar. The device has been set up and ...
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1answer
37 views

Host multiple website using nginx on the same IP [duplicate]

I've set up a Raspberry Pi to act as web server, so I've installed nginx with php5 and I bought two domains: domain1.co.uk Domain2.it I have a static IP which is linked to these two domains, so if ...
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2answers
3k views

Ping fails to find host but NSLookup resolves okay

We have an intermittent problem on Windows 8 whereby Ping fails to find the host but NSLookup resolves it correctly. Ping host1 - fails with ping could not find host Ping host1.domain.local - also ...
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2answers
2k views

Network devices disabled

I've been running the Lucid Lynx alpha since first release and only now, after recently putting my computer into suspend then restarting, has the networking failed completely. Both wireless and ...
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37 views

iptables snat does not change source IP

I am on ubuntu (with IP 10.0.0.1) trying to snat packets going out from port 9090. I want to change the source IP to 10.0.0.2 I have added the following rule through iptables: # iptables -t nat -A ...
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0answers
15 views

virtual box disconnects from network when “saving machine state”

I am using NAT and running VirtualBox 4.3.10 with Debian on a Kubuntu 14.10 host. In Network settings, I use the defaults: NAT PCnet-FAST III (Am79C973) Promiscuous Mode: Allow VMs cable ...
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2answers
53 views

What exactly does the ping command do? [duplicate]

I know that the ping command is used to check if any remote machine is accessible from my machine. But I do not know how it determines that. My wild guess is that it sends some sample data to port ...
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2answers
824 views

subnet mask creater

Create a sub net mask for 512 subnets using 172.31.0.0 The default sub net mask for a class b network is 255.255.0.0, working through the borrowing off bits using the formula 2^n, n being the bits ...
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1answer
399 views

Mask a class D IP address

Last time I asked about masking class D ip addresses. I found that we cannot mask class D IP addresses. But, now I have another question about masking D class IP addresses: If I want to recieve a ...
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3answers
4k views

Class D ip address

Is there mask for class D ip address? As it is for multicast, I am not sure about it. I read somewhere that D ip addressas are 32-bit network addresses and they dont have hostID, but in the following ...
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1answer
2k views

How do I calculate how long a packet will reach its destination?

I am stuck with this homework question. I honestly have no clue what it is talking about. The question asked: You are transmitting 100 bit packets over a long distance link of 40 km. I assume ...
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1answer
39 views

connecting to local host on my laptop from Android [closed]

I have a router which connects me to my modem for internet access I am trying to use weinre for debugging http://people.apache.org/~pmuellr/weinre-docs/latest/ I can't get it to work my setup is as ...
4
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1answer
150 views

Configuring subnets quandry

I am learning the basics of subnetting however am faced with a dilemma on approaching the issue. For example I have been tasked to set up a network with 20 hosts using a Class C network addressing ...
2
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1answer
1k views

Can I temporarily affect ARP table without using `arp` command directly?

I have some knowledge about arp command under linux which can help modify the ARP table. Now I want to temporarily affect ARP table(add, delete and change) entries without the help of arp. For ...
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2answers
2k views

vnc via ssh tunnel: channel 3: open failed: connect failed: No route to host

I was used to connect from A to a system B through vnc with ssh tunnel via C. I do the following: In B I start the vncserver: vncserver and let's say I get the :12 In A I open the ssh tunnel: ...
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1answer
143 views

Token Ring - is a MAU required?

I'm writing a paper for school on Token Ring, but I'm having trouble discerning something. From what I understand, there are two types of Token Ring networks: wired, and star-wired. I understand ...
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1answer
24 views

Ethernet Data Traffic hidden from Wireshark capture

I have a puzzle I am not able to figure out, I would appreciate any help. I am connected to a remote desktop using windows default remote desktop utility (Windows 8 locally, Windows 7 remotely). The ...
0
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1answer
19 views

Transparent proxy for wired+wireless network

I want to install squid as a transparent proxy for my home network. I have a HP microserver currently serving as my NAS+media server. I am thinking if I get a second NIC for the server I can lay the ...
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0answers
17 views

Unable to connect to IPv6 from Windows 8.1 via OpenWRT router

I'm new to Ipv6 and trying to learn it. So, I decided to use 6to4 tunneling from Hurricane Electric in my OpenWRT router since my ISP does not provide IPv6. It work perfectly in my router. But when I ...
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0answers
57 views

Mac OS X Yosemite limiting upload bandwidth

I have ADSL internet, and when there is an application uploading to the internet at full speed (e.g. Skype or Chrome during file uploads), the download bandwidth becomes very very slow. I.e. I cannot ...
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0answers
9 views

accessing modem setting via router [duplicate]

i am trying to access my modem setting via the router how to do it i cant get it to work my setup is as such pc>router>modem>internet the ip address are as follows ip of router is 192.168.1 ip ...
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0answers
18 views

My hostednetwork works, but devices connected don't connect completely to internet.

ok, so this makes no sense at all. i use the hostednetwork from windows 7 done through the command prompt when used as admin, well i set it up, i have my other network sharing and everything is ...
0
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1answer
23 views

Config to make only pcap receive packet

I am trying to use pcap to modify the packet before sending it out. For example, I have a server (running Ubuntu) listening on port 8000. Before it sends out SYN-ACK for incoming SYN packet, I am ...
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2answers
54 views

Can ping another compurer by IP but can can't folder/file sharing in Windows 7

I have some computer with same workgroup and one of them is a print sharing server (localPrintServer machine). All computer can connect into localPrintServer by \\localPrintServer or \\192.168.1.2 ...
0
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1answer
22 views

Multiple VNC servers behind a NAT

I need to remotely access 100+ work computers (Windows XP, Vista and 8). The PCs are all on the same local network, their dynamic IPs set by DHCP. They're behind a NAT and the public IP address is ...
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2answers
37 views

Can't create virtual switch in Hyper-V on Windows 8.1 laptop

I'm trying to create a virtual switch on a Windows 8.1 laptop. It has a physical WiFi network and a USB connected Ethernet connection. When I try to create any sort of virtual network ...
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1answer
26 views

I have a Windows computer providing a shared Internet connection; how do I get it to serve a sign-in page to visitors? [closed]

I have a computer running Windows which is providing a shared Internet connection. How do I set it up so that it serves an authentication page to visitors, using web server software such as Apache?
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0answers
30 views

Is it possible for WiFi adapter to degrade?

Recently i've started to get high package loss ratio while connecting to the internet on my laptop via WiFi adapter. I made following experiment: my laptop and laptop of my friend were on the same ...
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1answer
49 views

Can't reach Ubuntu guest vm from Windows host using VirtualBox Host-only interface

I used to have this working, but had to reinstall VirtualBox this morning. I have Windows PC with VirtualBox installed. I have an Ubuntu VM. I am unable to access services on the Ubuntu VM from the ...
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2answers
9k views

how to enable 'Properties' button of TCP/IPv4 in Network connections in Windows 7

In the Control Panel\Network and Internet\Network Connections, I have a Wireless Network Connection. When I right-click on it, a properties dialog opens. Now, I need to change the IP address for ...
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0answers
48 views

Some sites load very slowly or not at all

I am staying with my friend in her dorm room. She doesn't have wifi, we're just using one Ethernet cable she has. While her computer (win7) works as expected, when I plug in the cable, some sites are ...
0
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1answer
68 views

VPN Error 800 - Can't connect to netowrk

Computer is running Windows 7 Pro. Basically what is happening is every time I am trying to VPN into the server, it comes up with: "Error 800: Unable to establish the VPN connection. The VPN server ...