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

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Fail-over VPN with two ISPs and Cisco ASA 5500 Series

We have a couple of branch offices that need to connect to a main site. We plan to use Cisco ASAs 5515 to establish VPN connections. We would also like to have 2 ISPs at each location to make the ...
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1answer
205 views

How to find out why website is not accessible? [closed]

I cannot access a certain website. There are two possible reasons: The block is on the ISP side. The block is at the website. Is there a technical way to figure out which of these are causing the ...
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1answer
130 views

Input Packet Drops

Currently, my Cisco 2600 router running CIOS 12.1 is experiencing packet drops on the interface that connects to the ISP. #show int fa0/0 FastEthernet0/0 is up, line protocol is up MTU 1500 bytes, ...
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1answer
73 views

Server is pingable on some ips but not on others

We have comcast business class internet with 5 static IPs. 4 out of 5 of them are assigned to a server that sits right behind the smc. The smc has DHCP disabled so it should be in pass through mode. ...
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96 views

Slow website from one connection

One of the websites is very slow on response from one particular connection. The trace route seems to be alright (total is ~110ms) but all pages of the site take much time to load. It works properly ...
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3answers
217 views

Several border firewalls in the same network [closed]

I'm currently analyzing the consequences of multipath connections for the firewalls. In that context, I'm wondering if it's really uncommon to have several firewalls at the borders of a network to ...
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1answer
175 views

Bypass ISP Block [closed]

is there anyway I can bypass ISP block to access website? I'm aware of proxy online but the flash video cannot play. I tried using open source dns but it seems to still use ISP's proxy.
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1answer
54 views

SPF record for sending emails

The website is under our server with the domain: xxxx.org.il the client email is xxxx@yyyyyy.co.il the email they get is from a third party the email we sent from the website are trough one of the ...
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1answer
69 views

Providing reverse records for records that map to ISP IP

I have been instructed to use my ISP ip (as a temporary fix for mapping my name server and domain records as my router dishes out rfc 1918 adresses to devices in my network where I am running an ...
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1answer
139 views

Diagnosing WAN performance & peering issues without a second ISP uplink as a comparison?

Background: I am able to access Twitter & Serverfault from work (using Level3) with no problems. However when I use RCN I get crummy service and am not able to load the page. Page reloads ...
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0answers
279 views

How to disable Nginx web pages caching to avoid ISP cache?

My problem is simple. I did some changes on a homepage this morning (add some sentence) and it did not appear in my browser. I cleared symfony cache, nginx cache, apc cache, restart apache, restart ...
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2answers
460 views

What networking hardware do I need in this situation (Fairpoint [ISP] “E-DIA” connection)? [closed]

Right away you'd probably want to say, "Well just ask Fairpoint." I've done that, a number of times in as many different ways I can phrase it and just keep hitting a brick wall where they will not ...
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1answer
60 views

Connecting two IPs like an URL [closed]

I haven't found answer anywhere, so here comes the question. My ISP connected me to a router with thousands of other clients, so my public IP is the same as many others. And I want to make a small ...
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3answers
113 views

How drastically can a public IP change?

On ISP level, is it commonly limited to some subnet mask? Is it possible or rare for an ISP to randomly change an IP's first 2 bytes? Just as a bit of backstory, I'm trying to deter users from ...
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3answers
49 views

Timeouts on a website - tech support says the fault must be local to me [closed]

I try and access a webpage, http://billing.webhosting.uk.com, and almost always get timeouts. I contacted their tech support and they said no one else has reported issues, and that the issue must be ...
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0answers
46 views

How normal are remote connection faults and what do they mean? [closed]

Quick background: I have been having a lot of connection issues with my home network. I finally got my ISP to understand and after them checking some of the problems outside of my home I've gone from ...
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1answer
4k views

PPPoE Connection : “Generic-Error ”RP-PPPoE: Child pppd process terminated"

I have 2 Ubuntu 64-bit Virtual Machines installed on Virtual Box.Their name and ip addresses are given below.I am trying to establish PPPoE connection between the two machines. nas ...
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1answer
2k views

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
98 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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3answers
543 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
188 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
86 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
526 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
92 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
3k 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
1k 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
245 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
184 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 ...
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1answer
997 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
513 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
273 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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101 views

How to properly setup server IP?

We want to install a server in our office. Currently the server box is under 2 routers, through DMZ I succeeded to open it the world. But we want to install DirectAdmin to the server and the problem ...
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7answers
12k 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
1k 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
1k 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
9k 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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4answers
2k 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
263 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
239 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. ...
2
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2answers
357 views

What sort of magic is my ISP doing?

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 ...
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2answers
90 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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votes
2answers
161 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
371 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 ...
0
votes
4answers
2k 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
522 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
961 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
55 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
311 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 ...