Search Results

Search found 19557 results on 783 pages for 'networking programming'.

Page 247/783 | < Previous Page | 243 244 245 246 247 248 249 250 251 252 253 254  | Next Page >

• Network Sniffing and Hubs

  - by Chris_K

  This will likely seem naive to the experts... but it has been on my mind lately. For years I've been using ntop and a cheap 4 port hub to sniff client networks to determine who's doing what -- and how much. Great way to see what's going on when they call and say "Geeze, the network seems really slow today." No need to bring in a managed switch (or access the existing one) and no need to configure spanning or mirroring. I just drop in the hub inline where I want to measure. Lately I noticed it is just about impossible to buy a real honest-to-goodness hub anymore. While looking for a new one, I had someone tell me that I should be sure to get a full-duplex hub or I'd only be seeing half the traffic when I monitor. Really? I've been using a crusty old Netgear DS104 all this time. No clue if it is half or FD. Have I really been understating my measurements? I'm just not bright enough about the physical layer to really know... Side note: Just ordered a Dualcomm Ethernet Switch TAP as a hub replacement. Seems like a nifty gadget. Any notes or tips about it would be welcome in the comments :-)

  Read the article

• How can I make my eth0 connection default on startup?

  - by Alex

  I'm running kubuntu 9.10 and every time I log in auto eth0 is used instead of my custom connection called "batnet". I have batnet set to automatically connect, but despite this it is ignored and the default auto eth0 is used instead. This would be fine IF I could somehow figure out how to define a static ip for auto eth0. I would prefer to just make the 'batnet' connection default. How can I do this?

  Read the article

• Subnet address in apache access log

  - by m0ntassar

  I was inspecting my apache access logs(I use default combined log format) and I came a cross a wired entry 69.171.247.0 - - [22/Oct/2012:18:15:20 +0200] "GET /some site resources HTTP/1.1" 404 514 "-" "facebookexternalhit/1.0 (+http://www.facebook.com/externalhit_uatext.php)" As u see, this query come from a facebook robot that extract objects from site when somebody post a link. What I find weird is the logged ip address : 69.171.247.0 Does anybody know how is that possible ?

  Read the article

• Two domains accessing same folder

  - by Liam Quinn

  I've just taken a new role in a school and am still familiarizing myself with their network, how ever I have recently been given a task and I'm having a little trouble finding out the fundementals of it. I have an admin network/domain 10.49.x.x and a classroom network/domian 192.168.1.x both connect to a Proxy server 10.49.202.231/192.168.1.51. Each domain has it's own shared folders as you'd expect, files and software installs etc, how ever there is a folder "staff" on the classroom network that all the teachers on the classroom network can access. The users on the admin network would like to access this same folder. How do I go about making this happen?

  Read the article

• Unable to ping between subnets and out to internet

  - by battlemidget

  My setup is Modem - Linksys router - Laptop with 2 devices (wlan0/eth0) - desktop machine Router is 192.168.1.1 gateway to the internet Laptop wlan0 is 192.168.1.4 with a gw of 192.168.1.1 Laptop eth0 is 192.168.2.254 which acts as a second gateway desktop is 192.168.2.100 On laptop i've setup ip_forward to 1, and have inserted 2 iptables rules -A FORWARD -i eth0 -o wlan0 -j ACCEPT -A FORWARD -i wlan0 -o eth0 -j ACCEPT The laptop can ping outside the network (i,e, yahoo.com) it can not ping 192.168.2.100. The desktop can ping 192.168.2.254 but nothing outside the network or 192.168.1.0 subnet. On laptop ip route show lists: 192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.254 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.4 127.0.0.0/8 dev lo scope link default via 192.168.1.1 dev wlan0 What am I missing to make my desktop go through the laptop in order to access the router which provides access to the internet? Thanks

  Read the article

• 2 Computers, same network, different outgoing speeds when uploading to internet?

  - by user117339

  I have 2 work machines in my office, a PowerMac G5 and a MacBook Air. Both behind an IPCop firewall. The PowerMac is connected through a gigabit switch, the MacBook Air is connected through a Netgear 802.11g access point that is then plugged into the gigabit switch. There is also a FreeNAS box, both machines are able to read and write files to it at close to their pipe speeds. The main problem is when I am trying to upload files to the internet at large. The G5 is only hitting 0.1 - 0.25 Mbps. The Macbook is able to hit 2-3 Mbps. The setup (G5 / IPCop / Network) has been the same for 5 years. The issues with the internet speed started about 3 months ago. I hadn't tested on the Macbook at this point. I had complained to the ISP, they said their modem needed a firmware update, did that nothing changed. Reset IPCop, turned off squid, etc. No changes. The ISP switched the office over to a better plan with a theoretical 6 Mbps up, still no change. At this point I tried testing the Macbook, and lo and behold there's the speed. But why? I have tried changing out everything, cables, switches, using another ethernet port on the G5, wiping the system, using DHCP, using manual IPs, changing DNS servers, etc. Nothing works. I figured that if there was something horribly wrong with the network, then internally I would find a similar issue, but that is perfect. iperf, ping, etc show no dropped packets and near saturation of the internal network. I'm at a loss as to what the heck is going on. Any ideas would be appreciated! Below are some screenshots of speedtest.net: G5: Macbook Air:

  Read the article

• Could not use domain name instead of static IP

  - by Nam Gi VU

  Hi, I'm working with some partners in the UK. My office is in Vietnam. We are having a network problem: My partner can access an internal website using the domain name, e.g. http://website.name, but I can only access that website using the direct IP, e.g. 192.168.1.85. I can not ping that web server using "ping website.name" but it works if I using "ping 192.168.1.85". I want to use the domain name. Please help.

  Read the article

• Multiple wifi cards and Internet connections on Win-7

  - by Dpp

  Hello, I have two wifi cards and two separated internet connections. I connect to the Internet with both of them but one does all of the internet transactions (and I have not seen any place where I can specify which one I would prefer to use!) What I would like to do is use one of them for the browser and skype only, and the other one for stock exchange software for instance. Any idea if it is possible?

  Read the article

• Making an outside machine visible to private network

  - by William

  Hi, I'm trying to make a server visible to a every computer on a separate network without doing anything to the server but I'm not sure what would be the best way to do this. I really just need to access one folder but my attempting at NFS mounting failed since I can't NFS mount a mounted folder. Any advice? Thanks.

  Read the article

• How can a Virtualbox host connect to a guest VM when host wireless is disabled / host Ethernet cable is unplugged?

  - by uloBasEI

  I have a Virtualbox VM running on a computer connected to Internet via an Ethernet cable. The guest has a network adapter attached to a NAT. 2 ports (22 and 80) are forwarded so that the host can access them respectively on localhost:2222 and localhost:8080. When the Ethernet cable is plugged, both machine (host and guest) can access Internet and the host can access the SSH server/Webserver which ports are forwarded. When I unplug the Ethernet cable from the host, the host can not access the SSH server/Webserver of the guest anymore. Same situation with a Laptop connected to Internet via wireless when I disable the wireless adapter or set a wrong WPA key. My question is: is there a workaround for the host to access the guest services even if its Ethernet cable is unplugged / wireless is not available?

  Read the article

• Cisco: changing VTP mode server/client to transparent

  - by J. Smith

  I have around 40 L2 switches (2960, 3560, 3500, 3750) running in VTP client mode and one L3 switch (6500) running in VTP server mode, all connected together. I would like to switch everything in VTP transparent mode without any interruption of service. I've already test on a poc version with 3 switches (Catalyst 2950, 3560 and 3750). Using serial and SSH connection, it is seems working but i'm not sure it is enough representative compare to the real network. Knowing that the VTP Pruning is enabled, I am wondering what would be the best procedure to proceed the changement. I've read that we could lost connection by keeping it enabled. Should I change the server or clients first? Is it important to change the VTP domain and VTP Pruning parameters?

  Read the article

• An device with an unknown MAC address is connected to my router

  - by Yar

  There is a computer that is not mine that is accessible on my network. I can even access its filesystem via AFP. What I want to know is how the computer could get on my network. My network is secured like this: Does that mean that they've used password cracking tools? The pass is not easy to guess but not hard to figure out via brute-force hacking, I guess. If I am being hacked, should I switch to WPA?

  Read the article

• Determining the State of a User using their Hostname

  - by PhpMyCoder

  Not sure if this is the right SE site. I figured this question doesn't belong on SO, but if you think it doesn't belong here either, I apologize. I've been looking into determining the location, specifically the state, of a user accessing my website. One of the options I've known about for a while is the GeoIP City Database, however this isn't the most cost effective solution and I'm cheap so I was looking for a less expensive way. Something that occurred to me was that my state was in the public hostname assigned to me by Comcast: (Dash Separated IP).hsd1.ma.comcast.net Could it be possible that other ISPs follow this same pattern of inserting the state abbreviation into their users' hostnames? I've been looking around for a list of hostnames for other ISPs, but I haven't found anything. Can anyone verify that this holds true for other major ISPs?

  Read the article

• What is the network address (x.x.x.0) used for?

  - by Shtééf

  It appears to be common practice to not use the first address in a subnet, that is the IP 192.168.0.0/24, or a more exotic example would be 172.20.20.64/29. The ipcalc tool I frequently use follows the same practice: $ ipcalc -n -b 172.20.20.64/29 Address: 172.20.20.64 Netmask: 255.255.255.248 = 29 Wildcard: 0.0.0.7 => Network: 172.20.20.64/29 HostMin: 172.20.20.65 HostMax: 172.20.20.70 Broadcast: 172.20.20.71 Hosts/Net: 6 Class B, Private Internet But why is that HostMin is not simply 64 in this case? The 64 address is a valid address, right? And whatever the answer, does the same apply to IPv6? Perhaps slightly related: it also appears possible to use a TCP port 0 and an UDP port 0. Are these valid or used anywhere?

  Read the article

• Tomcat and HTTPS connect timeout (local Proxy resolves it)

  - by smas

  I have web application on the Tomcat with webservices. I've noticed that all web services connected to https get timeout. I run this app on my localhost in my company. When I redirect all my connections through Fiddler (local proxy) everything works correctly. I don't want to execute fiddler all the time. my computer -> [FIDDLER local proxy] -> [remote proxy] // WORKS my computer -> [remote proxy] // timeout How to increase tomcat logging to get more technical logs than only "timeout". Is there any other way to get more information what blocks the https URL?

  Read the article

• All wireless networks suddenly disappear every once in a while

  - by snakile

  Lately, about every 15-60 minutes, my wireless internet connection disappears. When it does I can't find any other wireless network, though such networks exist. Only after rebooting the system, it goes back to normal and finds wireless networks, but only for a while. 15-60 minutes later it's disconnected again, not finding any wireless network. I'm using Windows 7 on Lenovo Thinkpad X201s. What could it be?

  Read the article

• connecting to a network using route command

  - by ami

  I have a computer with an external IP(192.168.223.220) and also an internal address (10.1.1.20) in order to connect to some servers that don't have external addresses only 10.1.1.xx . in order to connect to these servers from other machines I used the following command "route ADD 10.1.1.0 MASK 255.255.255.0 192.168.223.220" and than I was able to connect to the servers using there 10.1.1.xx address. The problem is that the hard disk of main server(192.168.223.220) died and was replaced and after the that I am not able to connect to the servers as before, the route command succeeds and I can ping 10.1.1.20 but not the other servers. Thanks I am using Windows XP and the print outs are D:\AurosHome\Scriptsipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : N100-master Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection 3: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Intel(R) PRO/1000 EB Network Connection with I/O Acceleration #2 Physical Address. . . . . . . . . : 00-30-48-34-BA-B9 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.225.180 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.225.254 DNS Servers . . . . . . . . . . . : 192.168.225.2 Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Intel(R) PRO/1000 EB Network Connection with I/O Acceleration Physical Address. . . . . . . . . : 00-30-48-34-BA-B8 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 10.1.1.20 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : Ethernet adapter Local Area Connection 2: Media State . . . . . . . . . . . : Media disconnected Description . . . . . . . . . . . : Mellanox IPoIB Adapter Physical Address. . . . . . . . . : 00-02-C9-25-34-0D D:\AurosHome\Scriptsroute print Interface List 0x1 ........................... MS TCP Loopback interface 0x2 ...00 30 48 34 ba b9 ...... Intel(R) PRO/1000 EB Network Connection with I/O Acceleration #2 - Packet Sche duler Miniport 0x3 ...00 30 48 34 ba b8 ...... Intel(R) PRO/1000 EB Network Connection with I/O Acceleration - Packet Schedul er Miniport 0x10005 ...00 02 c9 25 34 0d ...... Mellanox IPoIB Adapter - Packet Scheduler Miniport =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.225.254 192.168.225.180 10 10.1.1.0 255.255.255.0 10.1.1.20 10.1.1.20 10 10.1.1.20 255.255.255.255 127.0.0.1 127.0.0.1 10 10.255.255.255 255.255.255.255 10.1.1.20 10.1.1.20 10 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 192.168.225.0 255.255.255.0 192.168.225.180 192.168.225.180 10 192.168.225.180 255.255.255.255 127.0.0.1 127.0.0.1 10 192.168.225.255 255.255.255.255 192.168.225.180 192.168.225.180 10 224.0.0.0 240.0.0.0 10.1.1.20 10.1.1.20 10 224.0.0.0 240.0.0.0 192.168.225.180 192.168.225.180 10 255.255.255.255 255.255.255.255 10.1.1.20 10.1.1.20 1 255.255.255.255 255.255.255.255 10.1.1.20 10005 1 255.255.255.255 255.255.255.255 192.168.225.180 192.168.225.180 1 Default Gateway: 192.168.225.254 Persistent Routes: None

  Read the article

• Can't access to access to my web server inside a network with Firewall on

  - by ianenri

  I set up a Web server with the following: There is the Internet Router, configured to Port Foward port 80 to my computer assigned to my PC's IP: 192.168.1.128 My PC is connected to that wireless router from wlan0 Then, my PC is also connected to my device (which is the webserver) with a crossover-cable usign eth0 having this anohter IP: 10.42.43.1 Finally, my device (the webserver) is connected with eth0 with this IP: 10.42.43.55 As you can see, I need to install a reverse-proxy to be able to resolve to my device's webserver. I installed pound (proxy server) in my PC and configured properly to make 192.168.1.128 resolve to 10.42.43.55 So, I just typing my ISP provided IP 200.x.x.x resolves to my device webserver. But there's a problem: I HAD TO STOP MY FIREWALL. I don't know how I need exactly configure the firewall in SUSE YAST2, or at least iptables. Stopping it is not an option, not for security reasons, just because there's port fowarding rule that is needed to give Internet access to my device too. I'm using openSUSE 12.1

  Read the article

• Are neighbors formed in EIGRP and OSPF always directly connectly?

  - by xczzhh

  I always thought that neighbors formed in EIGRP were not necessarily directly connected because the only requirement for two routers to be neighbors is that they share the same Autonomous System and K-values, but it seems that I was wrong. I have looked up several books, they do not seem to give a clear answer. And I am even more confused with OSPF... Please, give me some light here. Thank you.

  Read the article

• Do I have to use a DNS PTR?

  - by JrSysAdmin

  I am currently working on a site in my free time with a few other guys and we are wanting to redirect xxx.com to our new site, yyy.com. So we have xxx.com set to redirect the 216.111.11.1 which is the IP for yyy.com. However, this just says the website is unavailable so it seems as though we need a DNS PTR to redirect 216.111.11.1 to yyy.com. Is there any way to do this without a DNS PTR? The pointer will cost us $15 and it just seems like there should be some better way to go about doing this. Any ideas?

  Read the article

• Losing WLAN connections but maintaining internet connections on WIndows 7 Workgroup

  - by Di

  I have 4 computers all running Windows 7 networked in a Work group through Billion 7404vgp-m wireless router. All drivers and firmware for wireless adapters and router are up to date. Windows Firewall and Defender disabled. Disconnected ipv6. Running Nod 32 anti virus software. All have own static IP address 192.XXX.X.XXX. When I Reset the router all computers have Internet and LAN access for about 1 hour and then they will lose the LAN connection but maintain Internet connection. Resetting wireless adapters or restarting computers does nothing to fix this but resetting router will. What is causing this? How do I fix it?

  Read the article

• Cisco VoIP stuck as Unregistered?

  - by Shifty

  Question: Why is one VoIP stuck as Unregistered? Background: We have a Cisco UC540 Small Business switch/router/voip combo. This phone was working until I powered everything down to install a larger UPS unit. The phone originally had a status of "Deceased". I removed the registration and tried to add it again. Now it just sits as "Unregistered". I even tried giving it another extension. I am stuck using the Cisco Communication Assistant since this is small business hardware. There is very limited CLI access. Also, from what I heard, if you access the CLI with out cisco permission, you will void any warranty. The phone in question is a Cisco SPA501G. It is connected to a SG300-28P. There are 5 other phones on this switch working just fine. I have tried other ports with no luck. Both the link and PoE lights are lit up. Any ideas?

  Read the article

• Sharing a printer on Windows home network

  - by Jeff

  I have a home network, and I'm trying to share a printer connected to one of the PCs. The wireless modem through which the internet comes through doesn't reach the entire house, so we have another router set up as well. The modem is 192.168.1.1 (let's call this A) and the router is set up as 192.168.1.100 (let's call this B). Subnet masks 255.255.255.0. The printer is hooked up to a PC on B. If my laptop is connected wirelessly to B, it can see the printer. However, if it's connected to A, it doesn't show up in My Network Places. How can I get it so that I can print to the printer regardless of whether the

  Read the article

• How to connect to internet 2 or more pcs with an usb wifi adapter

  - by bhaoahd

  In one pc I have an USB Wifi adapter (Realtek RTL8187L Chipset), from there a 10 meters cable to an outdoor antenna. With that I connect to a public Access Point. Now I want to be able to connect more computers to internet using that same connection that comes from the outdoor antenna, what options do I have to do this? I do have another usb wifi adapter with a small omni antenna, and a router encore ENHWI-G/A. This router can be used as a Wifi AP, but it needs a modem that works with the RJ45 connector. Is there a way I could take internet from the outdoor antenna, and create another AP indoor using that router to "repeat" that wifi that comes from the outdoor antenna? If creating this second AP is not possible, should I use some sort of local network between computers, connect my main PC with the outdoor antenna, and share the connection through the lan? (I would really prefer to have a second AP indoor so I can connect other devices like a Palm, but I am not sure how could this be possible with this router and the usb wifi adapter)

  Read the article

• Use LAN to interface Synergy while having WiFi connected to internet

  - by freonix

  Similar question and solution I have LAN and WiFi connection, with the WiFi connected to internet and the LAN is simply connected via an Ethernet cable between two computers. I need to get Synergy working without compromising the WiFi internet. I've tried the solution above but couldn't seem to work. Both of the computer are running Windows XP. Even setting the LAN IP to static and under the same subnet doesn't seem to work. Anyone with similar situation and got Synergy to work? edit : Refined the question for clarity. Also, the computer are able to ping each other. Remote desktop can be accessed as well. I suspect the problem lies in Synergy's configuration.

  Read the article

< Previous Page | 243 244 245 246 247 248 249 250 251 252 253 254  | Next Page >