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  • What keeps you from changing your public IP address and wreak havok?

    - by Whitemage
    An interesting question was asked to me and I did not know what to answer.. So I'll ask here. Let's say I subscribed to an ISP and I'm using cable internet access. ISP gives me a public IP address of 60.61.62.63. What keeps me from changing this IP address to, let's say, 60.61.62.75 and mess with another consumer's internet access? For the sake of this argument, let's say that this other IP address is also owned by the same ISP. Also, let's assume that it's possible for me to go into the cable modem settings and manually change the IP address. Under a business contract where you are allocated static addresses, you are also assigned a default gaetway, a network address and a broadcast address. So that's 3 addresses the ISP "loses" to you. That seems very wastefull for dynamically assigned IP addresses where the majority of customers are.. Could they simply be using static arps? ACLs? Other simple mechanisms? Anyone who worked at an ISP would be willing to explain this a bit?

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  • Unable to ping ip address between two locations

    - by Derek
    I have two locations office and home. From home I am unable to access my mail server. and from the office I am unable to access my personal web server. now these two locations are about 100 yards away and share the same connection from the isp. Its payed for on the same account. Also they both have different static public ip addresses. office is 216.248.94.xxx and home is 216.51.158.xxx. I cannot ping each address from each location.

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  • Unable to Connect to Internet with 3G USB Dongle for Particular ISP

    - by Kush
    I'm using USB 3G Dongle for Internet. Previously I was using Tata Docomo (India) as provider, and the Internet was working fine. Now I've changed to BSNL, but I'm unable to connect to the Internet on Ubuntu. However, I've checked access point settings and other configuration which are required for BSNL, and it is working fine with same Dongle on Windows 7. Also, I'm able to connect Internet with other providers on Ubuntu, but problem persists only with Ubuntu. The access point for BSNL in my region is bsnlnet. In fact I configure the Dongle with BSNL using default Network Configuration wizard that pops up when USB Dongle is attached. When Dongle is attached and configured with BSNL, I can see network strength in Messaging menu, in Mobile Broadband category, of Ubuntu (note: my network icon still shows "not connected" status). And when I try to use the connection that I've created, it fails to connect. So far, I tried using Sakis3g script that I came up with while wandering over this issue on other forums, it didn't worked either. I also made sure that there are no special configuration made for BSNL on my Windows 7 installation, and still it is working fine there, the problem is only with Ubuntu. How can I fix it?

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  • ISP Privacy Proposal Draws Fire

    <b>Krebs on Security:</b> "A proposal to let Internet service providers conceal the contact information for their business customers is drawing fire from a number of experts in the security community, who say the change will make it harder to mitigate the threat from spam and malicious software."

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  • Change ISP and MX static ip but no mail

    - by Tim the Enchanter
    We have recently changed our ISP, I have changed the MX record for our domain name to point to the new external static IP address for the router on the new ISP's connexion but I am not getting any mail (though sending works). Do I just have to wait will the change propagates? I am slightly concerned because I can connect to the web email service made visible through the new router, but not actually receive email. Have I missed something?

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  • really weird DNS problem in Ubuntu {after one month, seems like ISP problem}

    - by OmniWired
    Hello everyone. I been having this random dns problem, in Ubuntu 10.04 and in 10.10 it started about 2 weeks ago after (I believe) an update. Basically when I go to a website randomly I get that the website I'm visiting is not available ("Oops! Google Chrome could not connect to ..." & "This webpage is not available."). I tested with Chromium "7.0.515.0 (58587)" and Firefox minefield (4.0ish) and 3.6.9. I did these 4 things already: /etc/default/grub GRUB_CMDLINE_LINUX="ipv6.disable=1" and this: /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 *disabling Chromium DNS pre-fetching *using Google and OpenDNS servers as well as ISP DNS servers. But didn't improve, also no other computers in my network have the same problem. All computer wired to the same router. I'm a software engineer that run out of ideas, please help me. Thanks in advance. UPDATE: some programs (synaptic / firefox update/ vuze(azureus)) say connection refused for the error. Most of the time a second try will fix the "refusal". UPDATE2: I found out with Wireshark, that everytime I have this problem i've got this 192.168.0.10 8.8.8.8 ICMP Destination unreachable (Port unreachable) Confirmed an ISP error. ISP;Speedy Location: Argentina, Buenos Aires (capital Federal) Area.

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  • IPSec VPN using ZyWALL IPSec VPN Client: unable to connect from some providers

    - by Reshi
    I'm trying to configure an IPSec VPN to one company from my home. The company has SANET internet service provider. I was able to create a VPN connection from another company that has the same internet service provider. The problem begins when I'm trying to connect from another ISP like Orange or Telekom. Here is the log from ZyWall: 20120816 10:06:18:359 Default (SA Gateway-P1) SEND phase 1 Main Mode [SA] [VID] [VID] [VID] [VID] [VID] 20120816 10:06:18:375 Default (SA Gateway-P1) RECV phase 1 Main Mode [SA] [VID] [VID] [VID] [VID] [VID] [VID] [VID] [VID] 20120816 10:06:18:390 Default (SA Gateway-P1) SEND phase 1 Main Mode [KEY_EXCH] [NONCE] [NAT_D] [NAT_D] 20120816 10:06:18:718 Default (SA Gateway-P1) RECV phase 1 Main Mode [KEY_EXCH] [NONCE] [NAT_D] [NAT_D] 20120816 10:06:18:734 Default (SA Gateway-P1) SEND phase 1 Main Mode [HASH] [ID] 20120816 10:06:18:750 Default (SA Gateway-P1) RECV phase 1 Main Mode [HASH] [ID] 20120816 10:06:18:750 Default phase 1 done: initiator id [email protected], responder id 111.112.113.114 20120816 10:06:18:765 Default (SA Gateway-Tunnel-P2) SEND phase 2 Quick Mode [HASH] [SA] [KEY_EXCH] [NONCE] [ID] [ID] 20120816 10:06:18:953 Default (SA Gateway-Tunnel-P2) RECV phase 2 Quick Mode [HASH] [SA] [KEY_EXCH] [NONCE] [ID] [ID] 20120816 10:06:18:953 Default (SA Gateway-Tunnel-P2) SEND phase 2 Quick Mode [HASH] 20120816 10:06:48:968 Default (SA Gateway-P1) SEND Informational [HASH] [NOTIFY] type DPD_R_U_THERE 20120816 10:06:48:984 Default (SA Gateway-P1) RECV Informational [HASH] [NOTIFY] type DPD_R_U_THERE_ACK ZyWall informs me that the tunnel was opened. But I can't ping or access any computer in the network. My configuration at home: ISP: Orange Optical connection Terminal: GPON OPTICAL NETWORK TERMINAL G-25E Router: TPLink TL-WR941N --> SPI Firewall Enabled --> VPN - IPSEC Passthrough Enabled I was wondering if the problem could not be on ISP side (that he blocks somehow this connection because in SANET ISP it worked fine) or even in my terminal or router. What could I check? Where could be the problem ?

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  • Does image block (firefox addon) save internet bandwidth usage?

    - by dkjain
    Does image block save internet bandwidth usage. I have a data capped plan from my ISP ( 5GB at 2mbps and thereafter 256 kpbs / pm). I doubt if the addon or other similar addon actually saves bandwidht. Here is my point of view, pls correct if that is wrong. When a request is sent to the server, the server sends out whatever page it's requested to serve with all its text and images etc. So essentially my ISP has made his pipe available for the data to reach me thus he would count those bytes under my data plan. When the data arrives it's all first stored to my browser cache (folder) area which means all the data has actually been received by me/computer using my ISP's pipe. The browser then fetches those data from the cache and displays it. By hitting the stop button or blocking images via ur addon I am just choosing not to display the data which would remain in the cache or eventually be discarded if still on the network pipe after a timeout limit. The point is the data request have been completed by the ISP and so the data would be metered and thus using addon such as image block or hitting stop button while page is loading does not in any way save internet bandwidth. Your comments plz....... Regards dk.

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  • What are the advantages and disadvantages of having a hosted firewall?

    - by Roy
    Would you rather have your firewall hosted or in house if you've got the skills to manage it? We currently have 6 remote offices and 2 different ISP's, one private network and our firewall (Watchguard, licenses are due to expire) is also our main gateway. I don't see how a hosted firewall (in this case Fortinet) is going to work for us especially when it's cheaper to buy our own firewall and the transition from one ISP to a new provider will take some time because our current contracts aren't due to expire soon. What are to pros and cons of having a firewall hosted by your ISP in general?

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  • SLA Violations - Compensation expectations and vague contracts

    - by llllxllll
    Tagging this as cautionary tale. I took over for an admin a year and a half ago, and reviewed the 3 year contract with our ISP. There were no specific SLA promises in the contract that I found, and have been meaning to review the contract with our rep. Of course, we had an outage this past week that resulted in almost four days of downtime !!!!! This involves eff-ups of epic proportions on our ISP's part and a telco they colocate with. Details can be provided. I am the network / systems / purchasing / and helpdesk at my company...and am willing to fight with the ISP. I also have more management that can get involved, including the name on the contract. First, if there are not concrete guarantees about compensation and downtime, we are screwed right? Two, if we want out of our contract, does anyone have experience going the legal route, and if so, who knows a lawyer? =)

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  • How does geolocation based on IP address work?

    - by Martin
    As all Internet users, I've visited web sites which appear to know in which country and city I'm located. I understand that these web sites typically look up my IP address in a database which maps IP address to country / city which works fairly well. I've also seen companies selling this type of database. How is this database, which maps an IP address to a country / city, created in the first place? Is there a central database somewhere where each ISP registers the link between IP address and country/city? Or does the companies selling geolocation databases contact different ISP's and purchase the mapping information from them? Or is there some organization 'above' ISP's who keeps track of this?

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  • Opensource Dns based incoming Load balancing ?

    - by sahil
    Hi, I am using Linkproof device for incoming load balancing based on which is based on dns. For example my linkprrof have 3 isp link.... it also act as a dns sevrer for my sites...so when someone connect me by using my dns name my linkprrof give them ip from 3 isp which ever is responding fast. so is there any same kind of open source solution for dns based incoming load balance is possible ??? sahil

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  • Network and Storage Devices Throughput Chart

    - by zroiy
    With all of the different storage and network devices that surround our day to day life, understanding these devices data transfer speeds can be somewhat confusing. Think about trying to identify your weakest link in the a chain that starts with an external USB hard drive (or a flash drive) that's connected to a 802.11g wifi router, can you quickly come up with an answer of where's the bottle neck in that chain , is it the router or the storage devices ? . Well, the following chart should give you an idea understanding different devices, protocols and interfaces maximum throughput speeds. Though these numbers can fluctuate (mostly for worse, but sometimes for the better) due to different kind of factors such as OS overhead (or caching and optimization) , multiple users or processes and so on , the chart can still serve to provide basic information on the theoretical throughput different devices and protocols can get to.. Enjoy.  Link to the full size chart   References:http://en.wikipedia.org/wiki/Sata#SATA_revision_1.0_.28SATA_1.5_Gbit.2Fs.29http://en.wikipedia.org/wiki/Usbhttp://en.wikipedia.org/wiki/Usb_3http://en.wikipedia.org/wiki/802.11http://mashable.com/2011/09/21/fastest-download-speeds-infographic/http://en.wikipedia.org/wiki/Thunderbolt_(interface)http://www.computerworld.com/s/article/9220434/Thunderbolt_vs._SuperSpeed_USB_3.0  Icons:http://openiconlibrary.sourceforge.net/gallery2/?./Icons/devices/drive-harddisk-3.png      

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  • My colleague can't visit our website through her provider after long downtime

    - by Peter Westerlund
    We did a frontpage update some days ago that caused the site to crash. The site was down for several hours. After troubleshooting, we concluded that we needed to cache more content. It had been run too many queries. After solving that and rebooting of server, we here in Sweden and Norway were again able to visit the site. But a colleague in Tunisia couldn't. It seems to work from another internet provider but not her own. What could have happened? And what should we do? Edit: I should add: She is able to visit the site through tunnel at anonymouse.org.

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  • Can I host a high traffic website at home?

    - by eric01
    I've been searching this up on google but I can't formulate my google search with the right terms to find an accurate answer to my question. Is it possible to have a super-fast connection at home to host a high traffic website? What is the generic term for that kind of connection? What's the major drawback of hosting at home? (I have no idea of the price range but it's probably quite expensive) Do you have to be a company to have the right to own such a connection?

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  • Problem connecting to isp server using xl2tpd as client. Ubuntu server 13.04

    - by Deon Pretorius
    I have followed guides found on google and ubuntu support pages and can get xl2tpd connection up but only under the following conditions: 1 - ADSL model must be configured and connected to the ISP or 2 - ADSL modem in bridge mode I must have an existing PPPoe connection established. If neither of the above are active xl2tpd wont trigger pppd and connect to the isp and thus tunnel connection fails to connect to the L2TP server of the ISP. Am I doing something wrong; /etc/ppp/options.l2tpd.axxess ipcp-accept-local ipcp-accept-remote refuse-eap refuse-chap require-pap noccp noauth idle 1800 mtu 1200 mru 1200 defaultroute usepeerdns debug lock connect-delay 5000 name (name used for ppp connection) /etc/ppp/pap-secrets # * password (name used for ppp connection as above) * (ppp password supplied by isp) /etc/xl2tpd/xl2tpd.conf [global] ; Global parameters: auth file = /etc/xl2tpd/l2tp-secrets ; * Where our challenge secrets are access control = yes ; * Refuse connections without IP match debug tunnel = yes [lac axxess] lns = 196.30.121.50 ; * Who is our LNS? redial = yes ; * Redial if disconnected? redial timeout = 5 ; * Wait n seconds between redials max redials = 5 ; * Give up after n consecutive failures hidden bit = yes ; * User hidden AVP's? length bit = yes ; * Use length bit in payload? require pap = yes ; * Require PAP auth. by peer require chap = no ; * Require CHAP auth. by peer refuse chap = yes ; * Refuse CHAP authentication require authentication = yes ; * Require peer to authenticate name = BLA85003@axxess ; * Report this as our hostname ppp debug = yes ; * Turn on PPP debugging pppoptfile = /etc/ppp/options.l2tpd.axxess ; * ppp options file for this lac /etc/xl2tpd/l2tp-secrets # Secrets for authenticating l2tp tunnels # us them secret # * marko blah2 # zeus marko blah # * * interop * vzb_l2tp (*** secret supplied by isp) ^ isp server host name Any help will be greatly appreciated

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  • Want to use apache, ISP blocking port 80

    - by Will
    I am attempting to set up a small web server on my home network, but my ISP is blocking incoming port 80 ( and no, i'm not paying $50/month extra for them to unblock it). I am looking for some ways around this, obviously I can change the port # but I don't find this ideal. really appreciate any ideas for this

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  • Override my ISP's "domain not found" page?

    - by Amanda
    If I screw up typing a URL, my ISP shoots me over to their branded search page. So if I type "superuser" in my location bar I end up at http://domainnotfound.optimum.net/cablevassist/dnsassist/main/?domain=superuser I'd like my browser to leave the location the way it was and just say "nothing doing," rather than redirecting me to a search. Can I override that in my own /etc/hosts or at my router?

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  • Windows 7 does not remembers my ISP address

    - by Samme
    Hi, m using Windows 7 Ultimaute x86. The problem is that every time i have to type my isp for the connection it does not remembers by username & password, but previously windows remembered the data of login, after every reboot i hae to do the same thing again n again. Please help me.....

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  • Troubleshooting an unstable internet connection

    - by Konrad Rudolph
    My MacBook Pro running OS X (10.9, but I had the same problem before) is connected to a Belkin router via WiFi and, using Virgin Media as the ISP, to the internet. The connection is extremely unstable – on some days, I get a ping timeout every few seconds. In addition, some domains seem to suffer general connectivity issues. For instance, I often find that while the youtube.com website loads, none of the videos (which are hosted on a separate domain) do. At other times, videos load but always fail to buffer, even though the actual connection speed is ok, even though I’ve disabled dash playback. Since I’m living in a rented room and the ISP contract isn’t actually mine I’ve got only limited possibilities of addressing the problem. In particular, I have no access to the router configuration and my non tech savvy landlady, while sympathetic, is not in a great hurry to hand the problem over to the ISP’s customer support. What’s more, I seem to be the only person in the house experiencing these problems – but I can imagine that this is simply because I’m the only one who’s using the internet continuously. I’m searching for specific tests that might be able to pinpoint – and ideally solve – the problem. So far all I’ve managed to do is establish that Virgin is routing my traffic in mysterious ways. Here’s an excerpt from traceroute google.co.uk. It’s worth mentioning that the host name doesn’t seem to matter a lot, the trace route is always the same. traceroute: Warning: google.co.uk has multiple addresses; using 62.254.36.148 traceroute to google.co.uk (62.254.36.148), 64 hops max, 52 byte packets 1 (192.168.2.1) 1.112 ms 1.300 ms 2.359 ms 2 10.100.32.1 (10.100.32.1) 11.926 ms 10.217 ms 24.987 ms 3 cmbg-core-1a-ae3-610.network.virginmedia.net (80.1.202.93) 28.809 ms * 66.653 ms 4 popl-bb-1b-ae16-0.network.virginmedia.net (212.43.163.141) 13.759 ms 126.504 ms 20.472 ms 5 nrth-bb-1b-et-010-0.network.virginmedia.net (62.253.175.57) 28.357 ms 16.398 ms 42.387 ms 6 nrth-bb-1c-ae1-0.network.virginmedia.net (62.253.174.110) 27.441 ms 15.622 ms 12.044 ms 7 lutn-icdn-1-ae0-0.network.virginmedia.net (62.253.175.82) 16.678 ms 28.463 ms 28.253 ms 8 * * * 9 * * * 10 * * * ^C If I let it, this goes on until the end of time. It never seems to reach a destination. Is this normal? A friend living in the same town who is also with Virgin Media has a more conventional traceroute output: 7 hops to google.co.uk, all of which send the ICMP TIME_EXCEEDED response. The obvious fix – rebooting the router – doesn’t seem to help. As far as I can tell, the WiFi connection is stable (I can always ping the router) so the problem is further downstream. I’ve tried using an alternative DNS before (OpenDNS) but if anything, this made things worse. In fact, it made all Google services nigh unreachable.

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  • MAC address stealing?

    - by Arnis L.
    Recently my i-connection started to get laggy. Sometimes it disappears completely. ISP told me that someone steals my internet. Someone has managed to sniff my MAC address, kick me out and surf web in my place. So... I'm curious - how it's possible to steal MAC address and what makes that mystical thief to be more privileged that when he uses i-net I lose mine? Or my ISP just lies to me? P.s. It's not wifi.

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