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• Networking "chokes" on Windows 7 64 bit

  - by Rohit Nair

  I've been having this problem for some months now, and I have been unable to figure out a solution, or even the cause. At random points throughout the day, my internet connectivity "freezes". I don't get disconnected from my local wireless network. My router doesn't get disconnected from the world. However, for some reason, my computer stops receiving packets. If I'm playing an MMO ( World of Warcraft, in this case, but it has happened with Eve Online as well ) all activity just freezes. If I try to browse, Opera, Firefox and IE all stall at "Waiting for google.com..." or whatever the hostname may be. Inspection with a packet sniffer seems to reveal that there are no incoming packets. Here's the interesting part. Disconnecting from my wireless network and reconnecting fixes the issue. Obviously this led me to conclude that it was a problem with my router or wireless card. However, I have tweaked all the settings on my router that I could think of, including things like QoS, AP Isolation, etc. with no change. My wireless card doesn't really have that many options, and I have uninstalled and reinstalled drivers a few times without any change. Windows Firewall on/off doesn't make a difference. Anyone have any suggestions for debugging this? It's becoming an annoyance.

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• No Outbound Internet on Windows Home Server

  - by Kyle B.

  Could someone provide some steps for me to check my internet connection on my Windows Home Server? It seems to have intermittent connectivity issues and I am unsure of how to diagnose the problem because it is a headless (no monitor, no keyboard) machine so the only way to get to the device is via remote desktop (which works fine). When connected to the machine, it doesn't pull up any microsoft.com sites and some other sites it does pull up (i.e. gmail.com) and some it doesn't (stackoverflow.com). To make matters more complicated, it has worked intermittently in the past for reasons unknown. Are there tools I can use to properly diagnose the reason for the connection failure? I can ping 127.0.0.1 just fine, I have internet working on my other router-connected machines, so I'm not sure why this one would fail. Any suggestions would be much appreciated and up-voted :) ** edit - thanks for suggestions guys, I'm going to try these tonight and will update my post. ** edit #2 - I hoping this is a more permanant fix, but I have both changed my port on the router as well as restarted the router at the same time. The internet (for the moment) appears to be working. I will be sure to try everything we have discussed should this problem persist. Thanks, Kyle

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• Wifi network undetectable on a Lenovo G470

  - by Rex

  I have a WPA2 secured network with a visible SSID at home that works perfectly fine with a Dell laptop,a HP netbook and sundry mobile phones. When I try connecting my sister's Lenovo G470, it refuses to detect the wifi network no matter what, but shows up the neighbors' networks. The Lenovo also works correctly at her office. Both laptops run Windows 7. Already tried/checked the following: Manually configure wifi network settings (copied over from the Dell) Ensure there is no MAC address filtering on the router. Ensure router DHCP server is not running out of addresses to assign (I have set it to allocate upto 10). Reboot laptop, router etc. Is this a known problem, and is there anything else one could try? Update - The problematic Lenovo uses Windows 7 Home Basic while the Dell that works uses Home Premium and the HP netbook uses Starter edition - if that makes any difference. Further update - It is able to connect if I reboot into safe mode with networking. However in 'normal' mode it shows up the network sporadically, and then says there was an error connecting to it. All the network parameters, password, encryption, etc etc are EXACTLY the same as they are on the Dell.

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• How to render remote assistance to a person using Live Messenger?

  - by Cheeso

  There is a feature within Windows Live Messenger v9 that allows a person to ask for remote assistance. BBut as I understand it, this works only if the router is UPnP enabled on both ends. Today I tried this with a friend during an active chat session, and nothing happened. I suspect a router problem. as I am remote, I cannot configure the router for them. What's a good way to render remote assistance? Here's the scenario: it will be based on invitation only (it's not a remote desktop or "logmein" situation). It's a younger person, a computer novice, on the other end of the wire. I'll be assiting with their use of applications on the PC. I'd l ike to be able to SEE the screen, and also use the mouse and keyboard. I have used Ultra-Vnc on the target machine and vncviewer on my machine, on a LAN. It works well. But I don't think I can use that, because it's my kids' computer in my ex-wife's place, and I don't want her to accuse me of spying on her computer. That's why I need it to be invitation only. Advice please. Is there an easy way for me to set up Remote Assistance? IS there some other tool I can use?

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• Default route not on LAN

  - by jarmund

  I have a network that in principle looks like this: H1---\ /----Inet1 H2---->---GW1---< H3---/ \----GW2-----Inet2 H1 and H2 = Hosts that need access to internet with GW1 Inet1 = Internet link over 3G connection Inet2 = 5GHz link to Internet (not always up) GW1 = Works as a router, automatically picking the "best" connection between Inet1 and Inet2 (the latter via GW2). GW2 = 5GHz wifi router And here's the problem: H3 only needs internet access when Inet2 is up. What i was thinking of doing was a routing table that looks like this: route to GW2 via GW1 default route is via GW2 I first set the route to GW2 via GW1 without a problem. But when i try route add default gw 1.2.3.4 (1.2.3.4 being the IP of GW2), it complains "SIOCADDRT: No such device" Is the problem that the default gw i'm trying to set is not reachable directly? Is there a different approach that would allow me to achieve this? An alternative (and hypothetical) approach: Since H3 will be using a static IP, is it possible to do some magic with iptables on GW1 to forward any packets from H3 to GW3, thereby "tricking" H3 into using GW2 as its default router?

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• Troubleshooting iptables and configuring it to drop the priority of long-term connections

  - by intuited

  I'm somewhat familiar with the general concepts of iptables, and would like to learn it in more detail. I'm hoping that my learning experience can also be useful. The situation: I'm running dd-wrt on my router. Despite its purported QoS skills, I'm still seeing connection latency shoot up hugely whenever there's an ongoing http connection, eg some large download. Under such conditions, it can take 10 seconds or more to load a basic webpage; sometimes the connections are dropped entirely. I've tried adjusting the parameters, dropping the allotted bandwidth for up and download to well under my limit, but nothing seems to work. dd-wrt is configured to use HTB as the QoS algorithm; HFSC, although presented as an option, seems to cause the router to crash, and is rumoured to not actually work on any linux system. I'd like to be able to troubleshoot this issue and hopefully improve the settings that dd-wrt is using, but I'm finding the learning curve a bit overwhelming. For starters I am not sure what HTB actually specifies: is this a set of iptables commands, or do some of those commands specify how HTB is to be used? I would like it to prioritize based on protocol the way that it already supposed to, and in addition I'd like to have it drop the priority of connections which have a high total byte count, say over 400KB. Also tips on utilities that can be run under dd-wrt to get more info on what's going on in there are appreciated. I've tried to get iftop to work but there were issues running curses. I'm leaning towards replacing dd-wrt with openwrt; comments on this strategy are also welcome. I suspect that I would be well advised to get a second router as a standin before trying that. It may be worth noting that my total bandwidth is pretty limited (256Kbit/s).

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• DHCP Server on local machine

  - by EralpB

  Hello I am trying to setup a dhcp3-server on Ubuntu. But my question is more generic, if dhcp server is in a blockbox and all clients are connected to it I think I get what is going on but when dhcp server is installed on one of the "clients" that confuses me. When I send a dhcp packet from that client to the dhcp server, will my ethernet card read and write at the same time? Or will it handle it internally without writing any data to ethernet cable. It's the first time I am encountering these network things so I am a little bit confused. Also I wonder If I am in a big network with lan IP let's say 192.168.0.100 and I install a dhcp server to my computer, can any other computers accidentally get IP from my dhcp server? Every computer has one ethernet card (if that matters?). And every computer is connected to one router. I guess the answer is no because the broadcast message won't reach to my computer since when router receives a dhcp search packet it will answer and it won't let other computers know about it because they don't need to. And without router sending that packet one by one, it cannot travel further. I'd be glad if someone enlightens me. Thank you very much.

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• Weird connectivity issue wtih USB Wifi stick.

  - by Carlos Nunez

  Hi, all! I'm not sure if this is the appropriate place to throw this question out there, but I'll give it a shot. I'm setting up two PCs, and I've been having massive troubles getting a USB wireless dongle working. I have two Sony VAIOs (Windows XP, SP2) that I found second-hand, and since they will be in a location too far to connect by Ethernet (no, can't do patch panels here :p), I need to connect them by wireless. Easiest and cheapest way to do that at the moment is by using two USB wireless sticks that I've had for a while, but never used. One of the computers is using a SMC-manufactured card, whereas the other is using a Belkin F5D7050. The box with the SMC card can see and authenticate with my router just fine, and has no problem obtaining a DHCP lease. The box with the Belkin, on the other hand, isn't so lucky. While it can see my router and associate with it, it will not obtain a DHCP-issued address. Worse, when I assign a static IP address to the NIC, it can ping the entire network and access the internet (meaning it can authenticate with the router), but no computer can ping to it UNLESS that computer pinged the computer that's pinging it first. Confused? Well, so am I. Has anyone had this issue before? Is this just a sign of a bad card? (For the moment, I have it connected by Ethernet, as I haven't moved it yet. However, this will be a problem when I set it up in its new home later.) Thanks! -Carlos Nunez

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• Cisco QoS Guidence

  - by Kyle Brandt

  I have a 10M connection to the internet that is hooked into a 100M port. I am getting started with QoS, and am hopping for a little guidance on setting it up on a Cisco 3825 router. Right now I am going forward with the idea that I have to implement it on my router, and the provider can't provide QoS for me. How I envision it working is that the QoS will drop or queue packets on my router and that will help prevent a situation where the provider has to start dropping a lot of packets. Right now all I am tasked with is making sure that one of the 3 LANs gets a certain slice (say 3M for Gig Lan1) of the 10M internet connection (But ideally this will be more flexible in the Future). 10M Internet on 100M port on HWIC-4ESW +-----------------------+ | | Gig Lan1 | Cisco 3825 | Lan3 on HWIC-4ESW | | +-----------------------+ Gig Lan2 I need to learn more about QoS, but having a target technology and maybe example configuration will help me wrap my head around the reading I am doing a little more. Which Cisco QoS Technology do you recommend for this particular situation? Have a basic sample config of how this might work? Right now the 10M line is not congested, so this more to have something in place in case it starts to become mildly congested in the future.

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• Windows 7 Multi-NIC woes

  - by Eric

  I have Comcast business Internet here. It gives me 5 static IPs. Most of the machines in my house connect to a router like every other household. It has a 192.168.117.x subnet, DHCP Server, etc. and all is well. However, I have a second machine on MY desk that has a life Internet IP. Up until yesterday, this machine was running XP Pro. The primary NIC was manually set to 192.168.117.241 with no gateway, and the secondary NIC was manually set to 173.x.x.171 with a gateway of 173.x.x.174. This worked just fine for years. Yesterday I replaced that XP machine with a brand new Windows 7 x64 box. Again, I configured it the same way. The onboard NIC was given a static 192.168.117.x address with no gateway, and the secondary NIC was given a live Internet IP address with the proper router, etc. 2 Problems. First is that the internal network (192.168.117.x) is listed as a public network because there's no gateway, so that means no homegroup, no file sharing, none of that. And I can't change it from what I'm reading... The second is that the machine reports the "router" ip address as it's address, and not the address that it's supposed to. I'm ready to tear my hair out over this. Any ideas?

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• ssh connection slow when using @hostname.com but now when using @ipaddress

  - by Alex Recarey

  When connecting to a Debian server using ssh, if I use [email protected] (the IP address of hte server) the connection is instant. If however I use [email protected] (a DNS redirected to the IP address of the server) the ssh connection hangs for a 20 seconds before connecting successfully. The ssh logs show the following: [alex@alex home]$ ssh -v -v [email protected] OpenSSH_5.5p1, OpenSSL 1.0.0c-fips 2 Dec 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 and here it hangs during 20 seconds before continuing. I think it might have something to do with reverse DNS or similar (the server does not really "know" it's name is hostname.com, it just has that DNS rediriected to its IP address). I have added the following options to /etc/ssh/sshd_config: UseDNS no GSSAPIAuthentication no to no effect. The server's DNS records in /etc/resolv.conf are configured correctly: ping hostname.com PING sub.domain.com (X.X.X.X) 56(84) bytes of data. 64 bytes from replicant (X.X.X.X): icmp_seq=1 ttl=64 time=0.029 ms 64 bytes from replicant (X.X.X.X): icmp_seq=2 ttl=64 time=0.050 ms?s Thanks for the help. Solution: It seems the DSL router my ISP saddled me with was causing the trouble. Changing my DNS server from 192.168.1.1 (router's IP) to google's (8.8.8.8, always good to know when you are in a hurry) instantly solved the connection delay problem. I am guessing that the 50€ router provided does not cache DNS entries, although I don't understand why pinging the DNS address had no delay, and 20 seconds is too long of a wait, even for uncached DNS. Tnanks again for the help!

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• Why can't I connect to computers on my network using our external IP address?

  - by Kivin

  My home network is serviced by an ADSL line. The modem is in bridged mode. The router performs the PPPoE. Three computers are connected to the router: two wired Windows 7 boxes and a Ubuntu Linux box over wifi. The computers are hosting various forms of services including FTP and HTTP. The router has port forwarding mapped from the relevant ports to the reserved IP addresses for the computers. If I attempt to connect to a server inside the network, such as ftp://67.xx.xxx.xxx from inside the network, the request times out. However if I connect using the internally mapped address, such as ftp://192.168.0.100, all is well. This is a nuisance for setting up software, especially on the laptop which needs to be able to phone home from anywhere, and I just don't have enough expertise with networking to know why this is occurring to even have a clue whether it can be solved or not. edit: It should be noted that the servers can be accessible outside the network - say, at the starbucks across the street - perfectly fine, using the ISP provided address and the appropriate port.

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• Lose internet connection, yet online games continue

  - by Mike

  For the past week or so, my internet connection has been anything but stable. Restarting my modem/router always fixes the problems, but since it has occurred so often, I'm noticing confusing patterns which I was hoping someone could help answer. My internet connection kicks out about 4-5 times a day. The sure-fire way to fix it is to restart my all-in-one modem/router. Sometimes I can diagnose the problem on my laptop which resets my wireless network adapter and fixes the problem, but not always. If that doesn't fix the problem, it usually reports that the connection between the modem and internet is the problem which requires a restart of the router. The odd thing which baffles me is that my connection is supposedly lost such that no browsers can connect to sites, yet things like online games still continue to play without issue. How is this possible? I thought maybe the game was running locally on my PC but that couldn't be the answer because I was still getting messages from other players. So my real question is: How can my internet browsers (firefox, chrome, even IE) lose connection to the internet, but other applications like online games not? Am I actually losing connection or am I mistaken? Edit: I'd also like to add that netflix on my PS3 which is directly connected to the same access point will also lose connection. So internet browsers and netflix lose their internet connection while online games continue without an issue.

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• Allow access from outside network with dmz and iptables

  - by Ivan

  I'm having a problem with my home network. So my setup is like this: In my Router (using Ubuntu desktop v11.04), I installed squid proxy as my transparent proxy. So I would like to use dyndns to my home network so I could be access my server from the internet, and also I installed CCTV camera and I would like to enable watching it from internet. The problem is I cannot access it from outside the net. I already set DMZ in my modem to my router ip. My first guess is because i'm using iptables to redirect all inside network to use squid. And not allow from outside traffic to my inside network. Here is my iptables script: #!/bin/sh # squid server IP SQUID_SERVER="192.168.5.1" # Interface connected to Internet INTERNET="eth0" # Interface connected to LAN LAN_IN="eth1" # Squid port SQUID_PORT="3128" # Clean old firewall iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X # Load IPTABLES modules for NAT and IP conntrack support modprobe ip_conntrack modprobe ip_conntrack_ftp # For win xp ftp client #modprobe ip_nat_ftp echo 1 > /proc/sys/net/ipv4/ip_forward # Setting default filter policy iptables -P INPUT DROP iptables -P OUTPUT ACCEPT # Unlimited access to loop back iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT # Allow UDP, DNS and Passive FTP iptables -A INPUT -i $INTERNET -m state --state ESTABLISHED,RELATED -j ACCEPT # set this system as a router for Rest of LAN iptables --table nat --append POSTROUTING --out-interface $INTERNET -j MASQUERADE iptables --append FORWARD --in-interface $LAN_IN -j ACCEPT # unlimited access to LAN iptables -A INPUT -i $LAN_IN -j ACCEPT iptables -A OUTPUT -o $LAN_IN -j ACCEPT # DNAT port 80 request comming from LAN systems to squid 3128 ($SQUID_PORT) aka transparent proxy iptables -t nat -A PREROUTING -i $LAN_IN -p tcp --dport 80 -j DNAT --to $SQUID_SERVER:$SQUID_PORT # if it is same system iptables -t nat -A PREROUTING -i $INTERNET -p tcp --dport 80 -j REDIRECT --to-port $SQUID_PORT # DROP everything and Log it iptables -A INPUT -j LOG iptables -A INPUT -j DROP If you know where did I miss, please advice me. Thanks for all your help and I really appreciate it.

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• File download speed issue over a dedicated fibre link

  - by nixnotwin

  My ISP has installed a fibre based dedicated internet connection at the place where I work. In the beginning the connection terminated at one of the ISP's core routers. It resulted in a strange issue. Eventhough the assigned speed was 5mbps, when tests were done by downloading large files over http and ftp from multiple locations, the speed never went above 2mbps. But bittorrent downloads reached 5mbps. Even file download from the ISP servers were fine. So, at the ISP our link was attached directly to their edge router. After this file downloads from high bandwidth servers, like Google and MS, reached the 5 mbps limit. Sometimes the speed would fall down below 2 mbps and suddenly it will go up to the 5 mbps limit ( it keeps on happening during any single file download). But other downloads like ubuntu apt repositories still struggle to go above 2 mbps. The engineers at the ISP have not been able to sort out the issue. After they moved us to their edge router instead of giving us 8 public ip's, they just gave 4 ip's. When we enquired about it, they told us that giving more ip's would result in arp overload at their edge router. But somehow I was able to convince them to give us the 8 ip's which we wanted. But the file download issue has remained. What might be the reason for files from different location getting downloaded with different speeds, that too with heavy fluctuation in speeds? I have downloaded files from same url's from a connection belonging to another smaller ISP, and the speeds were fine and reached full 5 mbps limit.

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• Can't do more than one activity at a time after switching modems

  - by vallorn

  I had to replace the Motorola 2210 DSL modem that I got when I signed up for AT&T DSL Direct a few years ago. The modem kept randomly restarting and it eventually gave out on me. I am assuming overheating was the cause here because it was almost too hot to touch. In any case, I replaced it with a Netgear DM111PSP. It works fine but I can't do more than one activity at a time with it. If my wife is watching Netflix, there is a noticeable delay/latency when trying to view web sites. It's even worse if I try to play an on-line game while she's streaming; the game is basically unplayable. The odd thing is, the only other activity I can do while she's streaming is stream another Netflix show myself. There is no delay when doing that, no buffering either. I'm not a networking guy so maybe there is an explanation for it but I find that kind of odd. I've tried using QoS through my Buffalo N600 wireless router and it doesn't seem to help. With the old Motorola modem, she could be watching Netflix while I play a game and everything worked just fine. Is there anything I can check or reconfigure possibly on the modem that would account for this? Should I just ditch the Netgear and get another modem instead? I have the Netgear modem connected to the Buffalo router in a bridged mode. Its the same exact setup as I had with the Motorola and as far as I can tell, it's not the router that is the cause.

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• best-practices to block social sites

  - by adopilot

  In our company we have around 100 workstation with internet access, And day by day situation getting more worst and worst from perspective of using internet access for the purpose of doing private jobs, and wasting time on social sites. Open hearted I am not for blocking sites like Facebook, Youtube, and others similar but day by day my colleagues do not finishing his tasks and while I looking at their monitor all time they are ruining IE or Mozilla and chat and things like that. In other way Ill like to block youtube sometime when We have very poor internet access speed, Here is my questions: Do other companies blocking social sites ? Do I need dedicated device for that like hardware firewall, super expensive router Or I can do that whit my existing FreeBSD 6.1 self made router with two lan cards and configured nat to act like router. I was trying do that using ipfw and routerfirewall but without success, My code looks like ipfw add 25 deny tcp from 192.168.0.0/20 to www.facebook.com ipfw add 25 deny udp from 192.168.0.0/20 to www.facebook. ipfw add 25 deny tcp from 192.168.0.0/20 to www.dernek. ipfw add 25 deny udp from 192.168.0.0/20 to www.dernek. ipfw add 25 deny tcp from 192.168.0.0/20 to www.youtube. ipfw add 25 deny udp from 192.168.0.0/20 to www.youtube.com

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• Cisco QoS Guidance

  - by Kyle Brandt

  I have a 10M connection to the internet that is hooked into a 100M port. I am getting started with QoS, and am hopping for a little guidance on setting it up on a Cisco 3825 router. Right now I am going forward with the idea that I have to implement it on my router, and the provider can't provide QoS for me. How I envision it working is that the QoS will drop or queue packets on my router and that will help prevent a situation where the provider has to start dropping a lot of packets. Right now all I am tasked with is making sure that one of the 3 LANs gets a certain slice (say 3M for Gig Lan1) of the 10M internet connection (But ideally this will be more flexible in the Future). 10M Internet on 100M port on HWIC-4ESW +-----------------------+ | | Gig Lan1 | Cisco 3825 | Lan3 on HWIC-4ESW | | +-----------------------+ Gig Lan2 I need to learn more about QoS, but having a target technology and maybe example configuration will help me wrap my head around the reading I am doing a little more. Which Cisco QoS Technology do you recommend for this particular situation? Have a basic sample config of how this might work? Right now the 10M line is not congested, so this more to have something in place in case it starts to become mildly congested in the future. I do have VOIP at one location connected to this one over the Internet that goes through a VPN tunnel. Everything else that is between this location and other offices is on a separate MPLS network.

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• network latency, TCP and UDP packets

  - by user115848

  Hello recently my network has started to cause me lots of problems. I have a cable modem, connected to a tp-link router (with some port forwarding). Everything was working fine then i started to get lots of udp (port 53) "UNREPLIED" logs in the router. Now there are tcp UNREPLIED logs too. This is causing lots of latency and failed connections when trying to connect to different internet sites. Also, we run an openfire server for spark connections, and I believe its causing connectivity issues for some users who are trying to connect using Spark (some people connect fine, others don't). Please see screen shot below for packet logs. It has to be something internally, as I connected straight to the comcast modem and i was able to connect to the internet and various sites as normal. I tried to swap out the router with a different and got the same issue. I scanned both my internal dns servers for viruses or malware and it came up empty. Another anomaly is that when i try to connect to www.cnn.com, i get redirected to the different site. I scanned my own machine for hijacks. Not sure if this is related to the networking issue. Please let me know if you have any ideas for troubleshooting.

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• How to point a subdomain to local server with dynamic IP

  - by jlego

  I see there are many related questions to this one, however the answers given seem to be a little vague for a novice like me. I've got a dedicated LAMP stack running Fedora 16 locally on my home network. Everything works fine internally. I can access the Apache server from other machines on the network using the internal IP in a browser. I'm using the stack for a local file server as well as a development environment for websites. There are a couple of reasons why I would like the development sites hosted on the machine to be available publicly. 1.) I use a CMS that has paid add-ons which allows you to assign the paid license to a domain. I can't develop with paid add-ons on the closed dev server. 2.) I would occasionally like for clients to be able to view the site dev at late stages before it goes live. I have a domain (foo.com, and I want to point a *sub*domain (dev.foo.com) to the local server. I know this is best accomplished with a Static IP, however my IP from my ISP is Dynamic and I don't think there is any way to change that. From what I have read, services like ZoneEdit & DynDNS are supposed to be able to accomplish this, but I have tried both and found it very confusing. Also the server is behind a router and I have also read that you need to set up DDNS(?) in your router, that many routers have presets for these services, and I've found that DynDNS is the only one my router seems to support.

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• Vista laptop 1 connects to network but Vista laptop 2 doesn't

  - by Jaips

  (Sorry if this is a dulipcate. I did a hunt but couldn't find matching question) We recently got a new router for our network (thomson TG585v8). It was already pre-configured by the ISP and was easy to setup. Both Vista laptops in this home network connected without trouble as well a iPod touch, all via wifi. In the last two days one of the laptops has been unable to connect cleanly to the network (connects as unidentified network). The other laptop, and iPod have not had any issues. I can't think of anything that has changed to make this happen now. I have rebooted the laptop and the router. I have updated the laptop wireless driver I have checked the laptop is set to automatically get IP I have logged into the router which correctly identifies all three wireless devices. The problem laptop connects via LAN without issue. Some things that may or may not matter: The problem laptop also sometimes uses a 3G dongle Both laptops use Windows Live Mesh to sync folders Laptop is usually set to go to sleep NB: it seems this is an intermittent issue, after an hour (since i noticed it) it seems to have fixed itself. Would love ideas though to solve this problem for good.

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• How to Load Balance 2 Internet Connections on a Windows 7 machine?

  - by Jimmy Chandra

  It's sort of related to this particular question, but that one is on Mac. I am looking for similar solution on Windows 7. I have 2 network connections: (Connection A) Wireless terminal connecting to ISP A (3G / EVDO internet provider) (Connection B) Broadband wired connection connecting to ISP B (Cable internet provider) Both has access to the internet. When I try connecting to a website and checking the networking tab on my Task Manager, I only see the network traffic being routed to only Connection A. Is there a way to make the computer to utilize both network (in a sense using all the bandwidth available from both the Cable ISP and the 3G / EVDO ISP) at the same time? If so, what do I need to do to set this up ... on Windows 7? Here is a bit more info on my network connections (ipconfig /all): PPP adapter Wireless Terminal: IPv4: aa.bb.ccc.ddd(preferred) Subnet mask: 255.255.255.255 Default Gateway: 0.0.0.0 DNS: aa.ee.f.ggg aa.ee.f.hhh Primary Wins: jjj.ii.k.l Secondary Wins: jjj.ii.k.m Ethernet adapter LAN: IPv4: 192.168.1.100 (connected to a router by wired that itself connect to a cable modem) subnet mask: 255.255.255.0 Default gateway: 192.168.1.1 (the wireless router) DHCP: 192.168.1.1 (the wireless router) DNS: xxx.yy.zz.ww rr.sss.t.uuu For my own privacy, I don't believe the actual number matters, the patterns are representative of the ip numbering scheme...

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• Delete ARP cache on Mac OS when moving from one Wifi network to the other

  - by Puneet

  I am facing wireless connectivity problems when I move from one Wifi network to the other. Here is how it happens: I am at my friends place. I connect to his Wifi. His Wifi router ip address is 192.168.0.1. Everything is fine I close my laptop, come back to my house, open my laptop and I connect to the Wifi Network at my place. Different ESSID, but the Wifi router address is the same 192.168.0.1. At this point I cant get to anything on the internet. To debug I try to see if I can ping the router (192.168.0.1), I cant. I get a no route to host. Meanwhile airport tells me Im connected to Wifi. I see the arp cache and I see a permanent entry for 192.168.0.1 ? (192.168.0.1) at 5c:d9:98:65:73:6c on en1 permanent [ethernet] This permanent bit looks problematic. I go ahead and delete the arp cache entry and all is fine with the world until I go back to my friends place where the same situation plays out. Now my question is, why the hell is this happening? If there is no way around it, can I run a script on Wifi connect/disconnect to clear out the arp cache? Im using Mac OS X $uname -a Darwin 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386 i386

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• Get Internal IP Address From DHCP Hostname

  - by ell

  I would like to try and get an internal ip address of one of the computers on my network. The reason for this is I have a little home server box downstairs but every time I want to SSH into it I have to open my router configuration and go on the DHCP client table and look at the IP address. For example I would like to be able to go ssh ell-sever instead of ssh 192.168.1.105 or whatever it happens to be. My network configuration is like so: Router downstairs that is connected to the Internet and is running a DHCP server My server computer (ell-server) is a headless pc connected to the router via ethernet cable. Running Ubuntu 11.04 Server Edition My laptop upstairs (ell-laptop) that is running Ubuntu 11.10 Desktop Edition connected wirelessly Other (irrelevant) computers - 2 x Windows XP, 1 x Xubuntu - all connected with cables. (It seemed to me the method of connection isn't useful information but I put it in anyway - just in case. If I have missed any information please tell me) Do I have to run a DNS server on one of my computers? If so which one? And does that mean I will have to run a DDNS client on each computer? Thanks in advance, ell.

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• VPN Client solution

  - by realtek

  I have several VPN's that I need to establish on a daily basis but from multiple workstations. What I would like to do it have either a server or vpn router that can perform this connection itself and that I can then route traffic through this device or server depending on the subnet I am trying to reach. The issue is that I only use VPN Clients to connect, so I am basically trying to achieve almost a site to site VPN but by using basically a VPN Client type connection from my network. The main VPN Client I use is the Sonicwall Global VPN Client where I initially use a Preshared Key and then it always prompts me for a username and password (not RSA key). My question is, is there any type of linux distro or even a hardware vpn router that can do this and connect to a Sonicwall device as if it were a client? I have tried pfSense which is very good but it fails to connect, probably due to a mismatch of settings. I have tried many others. Even dd-wrt on my router but it does not support whatever protocol Sonicwall uses. (I thought L2TP/IPSec) but it appears it may not be that. Any advice would be great! The other other thing I have thought of that I have not tried yet is Windows Server Routing and Remote Access but I have a feeling that won't work either. Thanks

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