An Internet service provider (ISP) is an organization that provides access to the Internet.

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

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 ...
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1answer
107 views

ISP Redundancy Hardware

I've tested Microsoft TMG 2010 to load balance my two DSL lines and it works fine. Can I expect the same level of results and security to be achieved with a less expensive firewall appliance?
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1k views

Does SSL encrypt the IP [closed]

I am building a personal server. I want to be able to access this server from anywhere, and I don't want this server to get blocked. It is my understanding that HTTPS encrypts my traffic, but I also ...
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3answers
207 views

How to become an ISP [closed]

well cutting to the point... I want to be able to provide internet to rural areas of my country so they can too gain acces to internet for free. I was wondering what I need to start small, like ...
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1answer
53 views

Can ISPs see which IP that has been assigned to a customer in each others network? [closed]

Is there some sort of shared knowledge between ISPs that make them able to see which customer an IP has been given to, no matter which ISP the IP belongs to? I.e. is someone that is an ISP able to see ...
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1answer
149 views

Only a small number of websites accessible [closed]

My ISP had some network issues today, and these manifested as a very strange problem. For some reason, the only websites accessible were those belonging to the ISP and to Google. However, all sites ...
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3answers
622 views

Find ISP/IP address by geographic location?

I'm trying to find an ISP or IP address by geographic location, Is this possible?
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1answer
101 views

Determining the State of a User using their Hostname

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, ...
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2answers
5k views

ISP login, MAC spoofing, WiFi and multiple devices

I have a Tikona Digital Broadband (WiMax based) Internet Connection which allows limited number of devices to be connected at a time and also requires that the users login with username and password (...
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1answer
2k views

Load balancing ISPs on Ubuntu Server

I have a Dell server with Ubuntu 11.10 Server installed on it. The server has 3 Ethernet cards eth0, eth1 and eth2. I have two ISPs say ISP1, ISP2 eth0 has a public IP (provided by ISP1 - we require ...
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2answers
55 views

What is a DSLAM5048G? [closed]

My local internet provider is talking about DSLAM5048G. What is DSLAM5048G ?
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3answers
308 views

Bizarre Site Slowdown for Some Users with .htaccess Directive

To protect my website on a shared hosting plan, I added this to my .htaccess file: <Limit GET HEAD POST> order deny,allow deny from .ru deny from .cn deny from .in deny from .de deny from .cz ...
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1answer
304 views

Are ASNs tied to one location/router/physical point?

I am trying to understand how BGP works, and is looking at ways to identify if my ISP is having bottlenecks/slowdowns/dos attacks at thier upstream ISPS. I have a bunch of ASN numbers that I can check,...
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1answer
1k views

Stealing internet by changing MAC address? [closed]

OK - I have a static IP - and I have been on the same provider for years - its a wired network (a cable goes directly to my network card) - and the cable is connected to a switch on a pole in the ...
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0answers
775 views

need help to setup internet load-balancing for a small ISP

I need some help about the following problems: I want to do load-balancing for two Internet dsl connection from same isp and same speed I need to manage fail over also I want to manage up to 50 user ...
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1answer
355 views

Need to configure Nortel SR1004 router for new Internet Connection

I'm trying to prep for a new fiber circuit that is being installed in our office and I'm having difficulty finding much documentation on the Nortel SR1004 router. The router currently is used for 3 ...
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8answers
18k views

Changing Servers - Redirect to new IP = No Downtime?

I am changing servers of my website. The IP of old server cannot be moved to the new one. To have no downtime I am planing to do the following, please someone confirm it will work: Setup the new ...
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2answers
3k views

How ISPs will assign IPs /subnets for end users in IPv6

Consider two scenarios: The end user has a simple computer, dual-stack The end user has a LAN behind a dual-stack router How will ISPs differentiate each one of these kind of users in IPv6? An ...
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3answers
2k views

Linux WAN failover simple solution needed

I'm banging my head against the wall to come up with a clever and simple solution to WAN failover. This is for a SOHO installation with two different external IPs. Only outbound connection failover ...
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2answers
19k views

postfix says mail sent ok, message does not arrive in ISPs inbox? no reject in log?

When I send a test message from my mail server to my @bellsouth.net email, The postfix log shows it was sent OK, but the message never arrives in my bellsouth inbox. Shouldn't I get a failure notice ...
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5answers
4k views

Downloads pause and time out frequently

I'm a new systems and network admin. My experience has been in the hardware and software of systems and servers, the network part is pretty new to me. I'm familiar with plugging numbers into network ...
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1answer
336 views

want to Request our ISp to do rdns/ ptr modify for my Staic IP ot point to my Domain?

we setup a mail server in our local office using Mdaemon Mail Server . We have a Staic ip 123.xxx.123.xxx ( as an example ) and all necessary ports (80 , 25 , 110 ) are made open . We have a ...
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1answer
294 views

Cache Appliance for ISP [closed]

We want to invest in a Cache Appliance solution to reduce our bandwidth and improve the user experience. Which cache appliance do you recommend? So far I have these candidates CacheBOX and CacheMara. ...
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2answers
391 views

What sort of magic is my ISP doing? [closed]

While trying to setup OpenDNS, and failing to make website filtering actually work, I realized my ISP is doing something nefarious with all HTTP requests. To make a long story short, if there's a Host:...
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2answers
93 views

Is this server setup efficent? [closed]

I have a web server at home. My IP address changes very often. My domain registrar is GoDaddy, so DynDNS does not work because GoDaddy only allows IP addresses for the A DNS Record. I can set a CNAME ...
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2answers
189 views

My bulk email company supresses all hard bounces -even if they get their IP's blocked

I send out about 500,000 emails every week. I have been sending the list out for about 1 year. But in conversation, I was advised that the company sends in a shared IP manner. So my list goes out ...
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4answers
381 views

Why are ISP's installing routers on my site when the feed is a form of ethernet already?

I'm connected to 3 ISP's right now. Two of them already have routers at my site, the third one announced me "they need to install some equipment" when I requested BGP session. I can only assume they ...
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4answers
4k views

Find the ip address of my modem from outside my network [closed]

I am out of town, and dyndns droped my account and deleted my ip address. I set up a new dyndns account, but I really need the ip address of my home modem. Is there any way for me to retrieve it? ...
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2answers
906 views

E-mail PTR failure - Spamcannibal

My IP is on Spamcannibal list. So I can't communicate with my registered partners. To be precise I can't send e-mail to only two domain. Everything else is ok. I try to talk with my domain/server ...
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2answers
1k views

Where to find/buy full list of updated ISP IP ranges?

I need to assign IPs of a huge daily visitor IPs to the ISP they come from. So I thought of buying the list of IP addresses corresponding to ISPs. Now so far I have only found: ip2country But I am ...
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1answer
60 views

What is typically involved on the ISP's behalf when you increase bandwidth on a leased line

We have a leased line with Virgin Media. It's a 100Mbit/s circuit but we're only currently paying/using for 10Mbit/s. We want to increase the speed and have been quoted a 10 working day turnaround ...
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1answer
381 views

ISP blocked routers: chap authentication failed [closed]

Some greedy ISP blocked our routers in vise versa country, routers worked fine about 2 years. First type of blocking was by ttl, and second type now. Waking up in the morning I found a line in the log ...
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1answer
88 views

When to expand a web server's unshared connection?

We have a 3 mbps by 3 mbps dedicated, unshared pipe that hosts a web server, mail server, and VoIP/web browsing traffic for 8 employees. The web server hosts a few different sites that average about ...
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1answer
5k views

How does DNS nameserver fall back work?

We have two DNS servers listed in our NS record. Last night, one of our DNS servers went down. As expected, some DNS servers were not resolving our hostnames. I assumed this would be temporary and ...
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2answers
155 views

Cisco ASA adding ISP static IP

We're about to switch from our old ISP to a new one. How do I assign static ISP-assigned IP CISCO ASA interface? Should I define it under NAT or Access Rules? Is it easier through console?
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1answer
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Dual ISPs - Load balancing

We currently have 1 ISP and are adding a second. I need to load balance this into our current network so it shares the bandwidth between our 2 ISPs. We have a total of about 10 external IP addresses ...
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3answers
332 views

How do ISP's block ports? [closed]

I'm currently working on a small town in Argentina and the only ISP that gets here is called Arnet. The connection stability sucks, the help desk is anything but helpful (non techs hired for around 2 ...
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2answers
2k views

IPsec tunnel keep crashing

I have 2 locations. On each location is installed VPN device Cisco RV042. Link between location is optical fiber. ISP is the same. Link speed on location A is symetric 3/3 Mbps, and there is static ...
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1answer
112 views

How to diagnose whether a customer's ISP is throttling access to my website?

We host a website that servers up mostly static files, such as html and flash SWF files. The server is hosted in Auckland, New Zealand. Our customers are mainly secondary/high-schools. In general, ...
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2answers
1k views

How do ISPs calculate bandwidth? [closed]

I mean, is 100 GB per month 100 * 1000^3 bytes or 100 * 1024^3 bytes? Wondering if they use the decimal definition like HDD manufacturers or the binary definition. I do know that there's technically ...
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1answer
487 views

Which port of my computer is my ISP connected to? [closed]

I'm trying to find out the port number of my computer to which my ISP actually connects & provides the internet service, given my ADSL modem is operating in Bridge Mode instead of PPPoE. I ...
12
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2answers
1k views

Linux TC class/filter numbering

I'm currently working on a traffic shaping solution for ISP-level companies, and came to an interesting (kindof philosophical) problem. Looking about the number of endpoints the system should handle (...
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3answers
761 views

Add frame window to all websites for users on network

I'm working for a small ISP and I'm trying to figure out how I can add a frame window to all websites that all users on our network see, so that we can promote faster speeds / notify users of downtime....
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5answers
160 views

Discrepancy between IPs in DNS and actual location address

I have inherited an environment where many things don't make sense and I am now in charge of making changes to it and for this I have to understand what the hell is going on before I modify. Long ...
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1answer
265 views

ubuntu-server 2 network devices, 2 isp

Hello I have the following szenario: I have 2 ISPs behind seperate routers, and one web/ssh-server with 2 ethernet cards. I want the webserver to be reachable from both isp. I have forwarderd each ...
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2answers
4k views

I cannot access some sites from my ISP sometimes [closed]

This happens a lot to my own sites that i browse daily from my ISP internet. Most of them are wordpress site. I host in webhosting provided by hostforweb. First it opens well and i can login to admin ...
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1answer
80 views

Questions and opinions of a Cable line with a back-up T1

My company currently has only a Covad T1 that connects the main office to the internet. This line is mainly for our billing office (located across the state) to connect to us for our Terminal Server. ...
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6answers
9k views

Intermittent high ping/latency problem

I have been working with my ISP (which is a WISP, actually Fixed Broadband Wireless) trying to figure out why I intermittently get high latency. The latency is detectable in online games and other ...
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1answer
125 views

File download speed issue over a dedicated fibre link

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. ...
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4answers
2k views

How to set up daisy-chained routers for separate sub-nets?

This question seems to be similar to others, but I'll take a shot anyway. A client recently switched ISPs from TDS to Comcast Business Class. Before the switch, they had 5 static IP addresses assigned....