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  • VOIP and internet connection speeds [cable vs. fiber]

    - by microchasm
    Our office is migrating to IP telephony. We have less than 10 employees that will be using the phones. We currently have cable internet, and they just bumped the speeds: There is a data center that was just recently built in our building, and we were considering co-lo'ing there in the near future. As a result, they offered us access to their triple-redundant internet, but it's quite expensive. They are offering 3mbps committed with up to 10mbps burst for $250/month (discounted). We pay ~$120 for our cable (which the plan was to keep--at least for TV). I want the phone system and LAN to be as separate as possible. Was thinking about keeping the cable for LAN, and using the other connection for the phones (until I saw the price). Now I'm thinking it might make sense to add on to our existing cable setup, and change our phone to only have DSL as a backup for the cable. Is there any real benefit to the fiber? Especially for the price? Any other suggestions or ideas? Thanks.

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  • routing problems

    - by user174050
    I have an windows 7 laptop and I have installed openvpn 2.2x as client. The laptop has 2 ethernet cards, one of them is wireless. The wireless lan is 192.168.1.0/24 The Fix lan is 192.168.2.0/24 If I connect to the openvpn server useing the Fix lan the I can connect properly and for testing I ping to my openvpn server 10.0.0.1 that answers correctly. But if I connect to the openvpn server useing the wireless lan, I can establish the connection but pinging to the server isn´t possible. The packets goes allways lost. Why can this happen? In an other laptop where windows xp is installed and with the same lan configuratio everything works propperly. In both cases the firewall is configured to access the vnc server and the server directories useing samba. With the XP I have no problems. I will thank you for all help Ignacio

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  • How can one restrict network activity to only the VPN on a Mac and prevent unsecured internet activity?

    - by John
    I'm using Mac OS and connect to a VPN to hide my location and IP (I have the 'send all traffic over VPN connection' box checked in teh Network system pref), I wish to remain anonymous and do not wish to reveal my actual IP, hence the VPN. I have a prefpan called pearportVPN that automatically connects me to my VPN when I get online. The problem is, when I connect to the internet using Airport (or other means) I have a few seconds of unsecured internet connection before my Mac logs onto my VPN. Therefore its only a matter of time before I inadvertently expose my real IP address in the few seconds it takes between when I connect to the internet and when I log onto my VPN. Is there any way I can block any traffic to and from my Mac that does not go through my VPN, so that nothing can connect unless I'm logged onto my VPN? I suspect I would need to find a third party app that would block all traffic except through the Server Address, perhaps Intego Virus Barrier X6 or little snitch, but I'm afraid I'm not sure which is right or how to configure them. Any help would be much appreciated. Thanks!

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  • 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?

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  • Taskbar Disappears Over Remote Desktop Connection When Outside Local Network

    - by CMikeB1
    I've got a machine on my home network running Windows Server 2012 (Based on Win8) and rather than attach a monitor I remote desktop in and it works fine on my local network. The problem is, when I try to access it from outside my local network the taskbar disappears completely. When I minimize an application rather than minimize to the taskbar it simply closes the window as small as it can as if the taskbar never existed (see photos at ). I've messed with the connection properties (show/hide desktop background, etc.) with no luck. I've used the following methods to remote in and they all are fine when on the local network and taskbar-less from outside: Remote Desktop Connection on Mac Remote Desktop Connection on Windows Jump Desktop on iOS using RDP To access the computer from outside my local network I'm using a Linksys router and mapping to the server IP, port 3389. See Photos: http://i.stack.imgur.com/FyUeQ.png http://i.stack.imgur.com/9MnVr.png

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  • What would cause a single working website to not work on 1 out of 5 devices on a network?

    - by th3dude
    There is a specific website that loads up without problem on all machines on my network (both wired and wireless) except one laptop. This laptop is a Windows 7 machine that was just recovered using the recovery partition, so it is fresh. The site will not load in Firefox 3.6 or IE 8. The website is http://www.weightwacthers.com The site loads fine on my desktop, iPhone, and Droid, but not the laptop. In all my years in this business I've honestly never seen this happen. Also, 'Is it down for me or everyone' reports that it is indeed only me. What would cause this to happen?

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  • Delete a iptables chain with its all rules

    - by timy
    I have a chain appended with many rules like: > :i_XXXXX_i - [0:0] > -A INPUT -s 282.202.203.83/32 -j i_XXXXX_i > -A INPUT -s 222.202.62.253/32 -j i_XXXXX_i > -A INPUT -s 222.202.60.62/32 -j i_XXXXX_i > -A INPUT -s 224.93.27.235/32 -j i_XXXXX_i > -A OUTPUT -d 282.202.203.83/32 -j i_XXXXX_i > -A OUTPUT -d 222.202.62.253/32 -j i_XXXXX_i > -A OUTPUT -d 222.202.60.62/32 -j i_XXXXX_i > -A OUTPUT -d 224.93.27.235/32 -j i_XXXXX_i when I try to delete this chain with: iptables -X XXXX but got error like (tried iptables -F XXXXX before): iptables: Too many links. Is there a easy way to delete the chain by once command?

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  • How should my CAT6e cable be terminated? No pairs?

    - by user231465
    I have just bought 60 meters of CAT6e cables, sold as "4 pair UTP RJ45". I have looked at various videos on Youtube but I cannot determine the correct wiring. all the colors of the cable I saw there are different from mine. Mine is untwisted, and it is not color coded. I have 8 pin connectors all of a single color. How should I wire this cable? EDIT THE PACKAGE DOES SAY TWISTED but they are not (twisted).

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  • Zune HD won't wirelessly sync with my laptop

    - by Keith
    I've got a zune hd and I am having trouble getting it to sync with my laptop. I have gone through the procedures listed on their webpage (http://www.zune.net/en-us/support/usersguide/musicvideospictures/troubleshootwireless.htm) but still can't get it to work. Any ideas?

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  • What does *:* in netstat output stands for?

    - by chello
    While executing the command /usr/sbin/lsof -l -i -P -n under root user, I am getting this output. COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ... httpd 9164 70 3u IPv4 0x2f70270 0t0 TCP 127.0.0.1:9010 (LISTEN) httpd 9164 70 4u IPv6 0x25af4bc 0t0 TCP *:80 (LISTEN) httpd 9164 70 5u IPv4 0x3149e64 0t0 TCP *:* (CLOSED) httpd 9180 70 3u IPv4 0x2f70270 0t0 TCP 127.0.0.1:9010 (LISTEN) httpd 9180 70 4u IPv6 0x25af4bc 0t0 TCP *:80 (LISTEN) httpd 9180 70 5u IPv4 0x3149e64 0t0 TCP *:* (CLOSED) Please let me know what does *:* stands for? I am interested to know both the ipaddress and port fields. Also what does (CLOSED) mean here?

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  • 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?

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  • Bridging networks problems

    - by Eric
    In my setup I have 3 computers and 2 (wireless d-link) routers. Computer1 has ethernet and wireless interfaces ethernet : 192.168.0.x (DHCP) wireless : 192.168.10.254 (static) Computer 2 has ethernet with two ips ethernet1 : 192.168.0.90 (static) ethernet2 : 192.168.10.110 (static) Computer 3 is a particular device with a hardcoded ip that I can't change wireless : 192.168.10.41 (static) Router1 manages internet and DHCP for network 192.168.0.0/24 Router2 is more complicated. I don't use DHCP. I use it to bridge between both networks. Its static ip is 192.168.10.1 Computer1 can ping Computer2. Computer1 can ping Computer3. Computer1 can ping Router1. Computer1 cannot ping Router2. Computer2 cannot ping Computer3. Computer2 can ping Router2. Router1 can ping Router1 Router2 can ping Computer2 Router2 cannot ping Computer1 Router2 cannot ping Computer3 This is very weird. Router2 manages the wireless connection, it should be able to ping its own computers right? My question is obviously : How can I make it so Computer2 can access everything else. This is a traditional case of "it was working before christmas and now it doesn't". The ethernet wiring is as follow : [ Computer1 ]----[ Router1 ]---[ Router2 ]---[ Computer3 ] I am using switch (lan) ports on Router1/2.

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  • 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?

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  • Is it possible to cause artificial network packet loss or latency?

    - by nbolton
    I'm trying to reproduce some issues on a deployed application where the MSSQL server and client are running in two separate machines. I think there may be network issues between the two machines, so I'd like to try and reproduce these conditions on two Hyper-V virtual machines (on the same virtual server). Of course, the network for these virtual machines is "local" so it's actually far from the conditions in a live environment. Is there a program I can run on either virtual machine which will degrade the network performance? Or maybe any other work arounds? For example, one way to reproduce the conditions may be to run the VMs on separate Hyper-V servers in geographically dispersed locations (so the SQL traffic goes over VPN or something) -- but this is a little long winded I think. There must be a simpler way.

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  • Can next hop address be same as destination address?

    - by Raj
    Like if host address is 100.0.0.1 and next hop address is 100.0.0.2 and destination ip address is also 100.0.0.2 Is this a valid use case? Any real life usage? <dest ip> <next hop> ip route 100.0.0.2 255.255.255.255 100.0.0.2 weight 1 next-hop-vrf GlobalRouter Above is the command on a router inside a VRF. 100.0.0.2 is pingable from host. 100.0.0.1 & 100.0.0.2 are an ip address assigned to a VLAN on host & destination respectively. On a linux box, Such configuration is valid. [root]# netstat -r -n Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 55.55.55.55 55.55.55.55 255.255.255.255 UGH 0 0 0 eth0 [root]# ip route show 55.55.55.55 via 55.55.55.55 dev eth0 As per my understanding, If a destination IP is reachable (i.e in the same subnet of host IP) we dont need a next hop. I came across one application for using next hop for destination IP in same subnet (i.e for VPN) See this: Will packets send to the same subnet go through routers? If next hop != destination IP but they are in same subnet as that of host, is a valid scenario for VPN, then i am wondering what are the applications of next_hop==dest_ip & subnet same as host? This is my first post in Super User. Extremely happy with the quick and warm response.

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  • Connect USB hard drive to wireless router on RJ45 port? Possible?

    - by lawphotog
    just a quick story behind. I was trying to set up wireless networked hard drive at home. My wireless router doesn't take USB. I am considering few options. First i was considering to get something like WD My Cloud. My router is an old one provided by service provider. It only has 10/100 Ethernet. WD My Cloud has Gigabit interface. So unless i changed a new router, data transfer will be slow. So upgrading the router is a must if i want fast transfer speed. Plus I already own an external hard drive with USB 3.0 interface. So if I get a router like Netgear D6300, i can get a decent speed wireless shared drive at home. And i can use my existing HDD instead of WD My Cloud. But the router isn't cheap so I am saving up for that. In the meantime I found out the existence of USB to RJ45 adaptor. I read the reviews and some say it works for them and for some don't. They didn't really say what they were trying to do so I'm confused. So if i bought an adaptor like this, can i connect my existing HDD (USB) with my existing router (RJ45) and use it as a shared drive for data transfer? I know it will be slow as the adaptor will only have USB 2.0 and 10/100 for Ethernet. But it's fine as it's for temporary until i got my new router.

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  • How to put fear of God (law) into Wi-Fi hacking neighbors [closed]

    - by Shakehar
    I live in an apartment and some new guys have apparently moved into one of the apartments. They have been shamelessly hacking into my WiFi. Mine was initially a WEP encrypted network and out of laziness I just limited and reserved the IPS on my router for the people in my house. Yesterday I had to free up an IP for a guest in my house but before he could join the network these guys connected in. I have changed my encryption to WPA2 and hope they dont have the hardware/patience required to hack into it, but there are many wi-fi networks in my apartment most of which are secured using WEP. I don't really want to call the police on them. Is there any way to deter them from misusing other people's wi-fi ? I have gone through I think someone else has access to my wireless network. What next? but I have already taken the steps mentioned there.

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  • Can I connect two routers to one switch?

    - by vanneto
    I want to connect two routers to a switch which will then be connected to a modem. Now as far as I know a switch does not do network translation and this won't work with one IP address. So I bought two addresses at my ISP. Attached is a simple schematic that explains what I want to do. Is there any additional configuration needed on either of the routers (Linksys WRT54GL) to make this work or will it "Just Work"?

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  • syslog log of TCP packet

    - by com
    Occasionally, I noticed a lot of following messsages in syslog Nov {datetime} hostname kernel: [8226528.586232] AIF:PRIV TCP packet: IN=eth0 OUT= MAC={mac} SRC={sourceip} DST={destinationip} LEN=60 TOS=0x00 PREC=0x00 TTL=63 ID=20361 DF PROTO=TCP SPT=39950 DPT=37 WINDOW=14600 RES=0x00 SYN URGP=0 On the Internet, I found that DOS attack may cause such type of output, unfortunately, I don't understand what does this log mean. The only thing is clear for me is this log is related to network. The source host is the host where nagios is installed. Does it mean nagios somehow does behave well? And what does it mean at all?

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  • Random timeout now and then

    - by KenavR
    Maybe this is a to generic question, but since we have this issue for quite a while now, I give it a shot. We have some applications which use HTTP for the connection between the client (website or fat-client) and the server. The Computer who runs this applications is in a Network behind a firewall and a proxy, the server isn't inside the same network. The problem is that every now and then the https Request times out and depending on the Client the Application "hangs" or does some other funky stuff. The problem is definitely inside our network, because if i try the applications outside our network it works fine. Can you give me a hint where i can most likely find the problem?

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  • one of my web hostings is down - only for me - why ?

    - by Thomas Traub
    My first post here, I am reading / learning a lot, thanks ;). I've got a mysterious issue (for me) and would really appreciate to get it solved. I've rent a reseller package with bibihost.com and it's now the second time that all my domaines the hoster's site are unavailable from my connection (my Mac and my iPhone), (in browser, per FTP, ping, ab, and traceroute) This has never before happened to me with other web addresses. traceroute get's always stuck at a specific server 40g.vss-1-6k.routers.chtix.eu (91.121.131.29) The sites are all up for everyone else, I've checked with downforeveryoneorjustme.com, a homegrown script loaded to another server and montastic.com My question(s) : Why am I blocked ? Is there anything I can do about it ? If I cannot solve this issue I have to change the hoster, but I really would like to know what's going on. my domaines on this server : tienstiens.fr tomlegrand.com

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  • Manually forcing TCP connection to retry

    - by Vi
    I have a TCP connection (SSH session to some computer for example) Network suddenly goes down and drops all packets (disconnected cable, out of range). TCP resends packets again and again, retrying with increasing delays. I see the problem and plug the cable back (or restore network somehow). TCP connection finally successfully resends some packet and continues. The problem is that I need to wait for a some timeout on point 5. I want to use my opened SSH session now and not wait for 5-10 seconds until it finds out that connection is working again. How to force all TCP connections to resend data without now in GNU/Linux?

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  • House Wiring for Ethernet/Coax/Power

    - by Adam Kragt
    Hoping this is the right place to post, the rest didn't seem to fit. If not, I apologize. Remodeling my house and want to wire up each room with Ethernet/coax wall ports. Both Ethernet, coax and power will be running through the sub-floor. I've read that there needs to be 2 ft between power cables and Ethernet to limit/prevent interference. Is this true? If not, does anyone know what the distance is? Thanks!

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  • 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 :-)

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