For questions on connecting devices together so that they can communicate with each other, as well as on networking equipment such as routers and switches.

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94 views

TCP packet issue with 802.11ac but not with 802.11n on an Android Nexus 6

I have an Android Nexus 6 that connects to my computer via an ad-hoc network. When my phone connects to the 802.11n card (TP-LINK 300Mbps Wireless N), the bytes are sent with no issue; verified with ...
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2answers
77 views

Share 3 Internet Connections with one router

I have 3 internet connections with three ADSL modems (three modems doesn't have wifi). I own a router which has 4 Lan ports and 1 Wan port. Now I want to connect the three ethernet cables (of the ...
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1answer
71 views

RJ45 connector crimping… Does it really make a difference as long as the cabling is “straight”?

Yes I am aware that there are standards on how to crimp a RJ45 connector. But my question is... does it really make a difference as long as both ends have the same color coding? Technically, it ...
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2answers
89 views

Why did setting a static IP fix my LAN connection issue?

My router is working perfectly, and all other computers use automatic DHCP to get an IP address (all hard wired--no wireless). This one laptop lan connection kept getting stuck "identifying" the ...
1
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2answers
338 views

Cannot copy large files between a Mac and a PC over WiFi

I have a 17" MacBook Pro (Late 2011 model). Whenever I copy a large file between them (> 1GB), the transfer stalls or fails outright after the 1st gig or so. It doesn't matter if the file is on the ...
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1answer
800 views

RDP connection gives nca_s_fault_access_denied

I have 2 PCs on the same network with fixed IP addresses and firewalls turned off. Windows 7 Professional and the service running on a Windows 7 Enterprise editon. System running with DCOM service. ...
0
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1answer
170 views

Public IP address to internal IP address Mapping on Watchguard firewall XTM 5 series

How do I configure NAT Mapping on Watchguard firewall with public ip address given by the ISP to internal web server private IP address? Many thanks. Public IP address ---> Internal Web Server IP ...
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2answers
2k views

Setting up DHCP and NAT on apple extreme with Virgin Media SH (APPLE)

I'm currently going mad trying to get my Apple Time Machine to be the DHCP and NAT Server. I've turned off DHCP in the Super Hub config and turned DHCP and NAT on in the Time Machine. Doing this, I ...
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0answers
257 views

Internet connection repeatedly disconnects/reconnects on only 1 PC with new router

Recently I have replaced an old wireless router with a newer one, and since then one of my devices has been experiencing repeated disconnection and reconnection to the wireless network. My wireless ...
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0answers
594 views

Intermittent recurring ping general failure to internet but not router

I have found very few posts that fit my exact scenario, but the ones I've found don't have helpful answers. (Like this one: http://answers.microsoft.com/en-us/windows/forum/windows_7-networking/ping-...
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1answer
36 views

Acer/Windows 7 Not connecting to wifi on specific network

My computer won't connect to my school network via wifi, I'm able to plug it into a port to connect, but it won't connect with the wifi. Well, it connects to the wifi, and says its connected to the ...
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2answers
5k views

“Private” MAC Address

I'm not new to home networking and I've been running DD-WRT routers for years. I'm a software developer, so "technologically" curious by nature but admittedly have never really researched in-depth low ...
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2answers
55 views

Error upon File->Open, every time, in TextPad

I have a Windows 7 Professional desktop that I have begun to use, logged in as a network user to a Samba4 AD domain. Whenever I go to open a file within TextPad (e.g. by choosing Open from the File ...
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3answers
84 views

Is there any way to share one laptop's monitor with another laptop?

As you may know, It is possible to connect two monitors to a single computer. I want to know if is there any way to use my ASUS laptop's monitor as a supplementary monitor for my VAIO laptop for ...
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0answers
36 views

How to chain VPNs, specifically with HMA and CB?

If I may, I heard that one could use more than one VPN, but when I try to they don't configure to work together. How do I configure them to work together? I say that because I'm trying to learn ...
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2answers
515 views

Network error: The specified network name is no longer available

I'm receiving this message after getting a list of files. And trying to move a file out of the list. There is no Antivirus software installed on this server. The server is Win Server 2003 SP2.
0
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1answer
61 views

Cannot set MAC address to any hex of my choice

I set my mac address for the wifi chip via: /sbin/ifconfig wlan0 down /sbin/ifconfig wlan0 hw ether ${WIFI_MAC_ADDR} /sbin/ifconfig wlan0 ...
2
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0answers
1k views

Openwrt bridging issue between wireless and ethernet port

I've this scenario: an AP connected to the STA wirelessly, the AP is a DHCP server I have following configurations in /etc/config/network of the AP: config interface lan option ifname 'eth1 ...
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3answers
140 views

Why are we getting low download speed as compared to the our bandwidth from browser? [closed]

Our bandwidth is 16Mbps 1:1 leased line, and we have been getting download speed of about 1.3+ MB/S earlier. But for 2 weeks we are getting a maximum of just 150-200 KB/S although the speed test ...
2
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1answer
93 views

tcpdump capturing packets only when interface is specified

I have tried 3 different ways of capturing a stream of packets coming into my server. Two of them work and the third does not. I am trying to determine why it is missed by the third approach: ...
0
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3answers
98 views

Routing to sub network with local DNS

Short and clean question We has domain that can be resolved and accessed from internet as ip. On host with that ip we has NAT and virtual machines that hidden behind that NAT. How can we give access ...
4
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1answer
135 views

Haywire laptop WiFi seems to cause router+modem unit to *also* lose *internet* connection…how?

This is a theoretical question about router+modem units, not a troubleshooting question per se. I have repeated the following observation several times now, at different times of day, between ...
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0answers
269 views

VMWare Fusion 7 Pro Networking Issue

My problem is very simple: IF USING WIFI, only the my mac can ping the VM running locally... other machines on the network can't. Suggestion? Ideas? tests to run? Details: Bridged Connection is ...
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0answers
62 views

ICMP flood with ping working only one time

my problem is simple: The first time I made a flooding ping to a fake ip on my network (for testing if someone is on promisc mode), it works perfectly: $ping -f 192.168.1.10 After perfoming this, ...
1
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2answers
67 views

Why does HTTP/2 have more latency over 3g?

I'm thinking about transitioning to the new HTTP/2 protocol, but a doubt has arisen. For a thing HTTP/2 advocates latency reduction, but I'm seeing the opposite really. When I load the Akamai demo it ...
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5answers
2k views

How to check public IP address availability

I have a few public IP addresses given by the ISP service provider. My question is how to check which IP addresses are already used up and which are still available to use for new servers? Because I ...
0
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1answer
527 views

Driver for LAN to USB

My on-board LAN dropped the link frequently, so I got a new PCI-LAN card. Unfortunately, it also drops the link. I had a hardware specialist check my motherboard. He says some internal links between ...
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0answers
83 views

Can't connect to VNC even though port is open and service is visible

A client with a small office network (under 20 devices) had me replace a malfunctioning Netgear router with a Buffalo WHR-600D router. On the previous router, I had set up port forwarding with custom ...
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0answers
183 views

Removed Network card from Device Manager (without Driver uninstall) now Windows wants driver Reinstal

I wonder if someone can help me. I have an (Dell) Alienware R4 ALX Desktop PC, purchased with Windows 8, but since updated to Windows 8.1. On Sunday, in effort to resolve another issue (which I ...
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4answers
376 views

Restricting SSH Access to Amazon EC2 Instance

I am preparing to set up an Amazon EC2 instance. It will be a testing and development machine to allow me to put PHP, Python, etc scripts on a server without being tied down to a local machine. ...
0
votes
1answer
313 views

How should I configure cntlm in order to use its tunneling feature?

pals, I'm using a PC (OS: Windows) inside a corporate network (a LAN) which allows internet connections through a proxy (classical situation), and I can't access to certain websites (Firefox is my ...
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0answers
93 views

Wireless USB adapter suddenly very slow

I have been using my wireless adapter fine for about 2-3 years on my Windows 7 PC, but a few days ago the internet became extremely sluggish, and no attempt to power on/off, re-plug, or fully re-...
0
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1answer
44 views

RDP into my server works except on a specific network

I have a weird issue where I can RDP into my server using my laptop at home, but when I try doing the same thing at work(same computer, different network), I can't remote into it anymore. I know that ...
0
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2answers
700 views

If HTTP runs on a port, does that mean TCP can also run on that port?

I'm building an app that needs to run on a mobile smartphone over a GPRS/3G network. I'm doing bit ops, so every byte wasted through HTTP headers is bad. Mobile providers in my area make heavy use of ...
0
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1answer
40 views

Windows7 / WiFi Issue

My laptop with windows7 is in trouble. It use to work as a charme but, unfortunately, my power supplier stops work. I bought one onto web and waited for it nearly two weeks. My laptop hasn't a ...
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0answers
61 views

How to get around a DDoS fully? [closed]

my network is currently down from a DDoS attack and I need to get around it. So far I found by switching to Googles DNS servers, I can access only some sites but not all of them. Is there another way ...
0
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1answer
253 views

On a host with two IP addresses, I am getting “no route to host”, but SSH works

I have a very strange problem. A server has two IP addresses on a single network interface: eth0 has 172.20.40.1 eth0:0 has 10.1.1.1 The address for eth0 is static, the one for eth0:0 comes from ...
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0answers
53 views

Unable to establish communication between computers - PacketTracer

I have been doing some scribbling in Packet Tracer. This is my layout, and I can't get the PC4 communicate with PC5. I've set up subnetting, IP's and static routing, but I can't communicate with the ...
0
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1answer
159 views

Using 3 LAN Connections Simultaneously

I have ;one onboard lan port and have two additional lan cards totalling to three lan ports. So can i use these simultaneously for internet connection. I know we cannot simultaneously connect to ...
0
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1answer
40 views

Why does 'redir' not work for me?

I am developing & testing with "remote servers"; using URLs for the remote system like "whatever.internal.ip:8080/someWebApp" Unfortunately, I am dealing with new IPs every day. And changing the ...
0
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0answers
113 views

ssh to a machine with bridge ports

I want to connect to a machine by ssh this machine has tow ports that are bridged. I am using bridge IP to connect ssh samie@192.168.1.97 But I get this error ssh: connect to host 192.168.1.97 ...
0
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1answer
64 views

Guest VM as firewall for other Guest VM

Maybe you can help me a bit. I am new to VM player.. I have Host - win 7 and two Guests on VM player. Kali Linux and Windows xp. I have troubles with setting network connections. Task is to create ...
0
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1answer
80 views

How to measure the transfer speed of an individual process?

One of the processes on our webserver that talks to an external email server is running really slowly. How can I find its transfer speed to/from the mail server? Needless to say I can’t just look at ...
0
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1answer
776 views

Why filtering on udp port in TCPDUMP gives only fragmented IP frames

I've a device capturing traffic with Tcpdump filtering on "upd dst port" then it creates a pcap file to be read in wireshark. what I obtain from running: tcpdump udp dst port 5201 -qUns 0 -i wlan0 -...
0
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1answer
2k views

Windows 7 - Connecting to PC on same network asking for username and password

I'm trying to connect to another PC on the same network so I can transfer files. I have been using the following tutorial http://windows.microsoft.com/en-gb/windows-vista/copy-files-to-another-...
2
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1answer
249 views

How can I add some static IP address at IPv6 for Windows 2012 DHCP server?

I would like to add some static IP address to my Windows 2012 DHCP server. I have tried to pair the IP address with its MAC address. At IPv4 it works, but how can do it at IPv6? Could anybody link a ...
0
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0answers
48 views

How can I access the internet connection on a windows machine via usb from a linux machine?

Suppose I have a laptop with a linux system with no internet connection, and a windows 7 pc connected to the internet. How can I use the internet connection of the pc on the laptop, connecting the ...
2
votes
1answer
32 views

Select default network card

I have a laptop connected to the internet via Wi-Fi. It is also connected to a private network via LAN. If the laptop is connected to both networks it doesn't have internet connection. How can I tell ...
0
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1answer
1k views

Configure VPN to access remote LAN network (Asus RT-AC66U)

I want to access a remote LAN network, without using this remote Internet connection when I browse websites for example. What I have so far is a working VPN connection (PPTP) but when I connect to it,...
0
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1answer
102 views

Linux: routing table - Gateway column: 0.0.0.0 vs *?

I have found SO question about What does 0.0.0.0 gateway mean in routing table? but this is not exactly what I want to know. I have noticed that in some outputs (e.g. here) of Linux route -n command ...