Questions tagged [isp]
An Internet service provider (ISP) is an organization that provides access to the Internet.
318
questions
65
votes
7
answers
9k
views
Government censors HTTPS traffic to our website. Workarounds?
I am helping run a website that has been blocked for political reasons by the same Russian agency that has previously tried blocking Telegram (RosKomNadzor). This is not the first time it happens, and ...
- 593
58
votes
6
answers
14k
views
Some ISPs don't charge for bandwidth used on Youtube/Netflix/Facebook. How do they monitor that? [closed]
In Poland, it is common for mobile ISPs to offer plans with limited amount of bandwidth per month, with exclusion of some popular apps. So for example all traffic from YouTube is not counted towards ...
- 671
32
votes
3
answers
3k
views
ISP broadcasting all IP-packets, so I can see traffic of other clients from ISP
Recently I wondered why my router shows a constant downstream of 5 MBit/s, while I am downloading almost no data. I discovered the "packet logging" function of my router, with which I was able to log ...
- 433
30
votes
4
answers
4k
views
Our wi-fi at work is ridiculously slow, will adding more range extenders improve it?
At work, we have two wireless networks (e.g., Work1 Work2); the Work2 is used downstairs and Work1 is used upstairs. However, both are notoriously slow. The connection is better when we are wired in, ...
- 477
27
votes
10
answers
7k
views
How can I buy end-user bandwidth for my customers? [closed]
I sell a product to customers, and as part of this product I have a website where customers can upload data for processing. The data is of considerable size (gigabytes).
I am looking to buy extra ...
- 381
25
votes
2
answers
23k
views
SOA and Primary NS record (DNS)
The brunt of the question is this -- What is the relationship between the primary nameserver specified in the SOA record and the nameservers specified in the NS records. How are these things linked?
...
- 490
24
votes
13
answers
5k
views
Server Hosting from your House - $200 to $300 per month range [closed]
I'm a developer lacking some infrastructure knowledge. What is the fattest pipe I can get to my house in the $200 to $300 range? I'd like to host a few servers at my house. Then if my company gets ...
- 591
17
votes
6
answers
9k
views
How does an ISP block my website with a warning message [closed]
I have searched about this topic on Google but mostly I got the result how to unblock website blocked by ISPs. So, I have a website that is being blocked from viewing by audiences and when I go to my ...
- 367
16
votes
1
answer
13k
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 ...
- 10.9k
15
votes
2
answers
899
views
How can I gain better insight into ISP-managed equipment (routers)?
I have a number of customers who have networking equipment managed by their ISP. This is usually in the form of an ISP-provided switch or router placed at the customer location(s).
For sites that ...
- 197k
14
votes
7
answers
32k
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 ...
- 237
12
votes
2
answers
47k
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 ...
- 4,503
12
votes
2
answers
3k
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 (...
- 571
11
votes
5
answers
38k
views
Finding all IP ranges belonging to a specific ISP
I'm having an issue with a certain individual who keeps scraping my site in an aggressive manner; wasting bandwidth and CPU resources. I've already implemented a system which tails my web server ...
user45795
10
votes
7
answers
11k
views
Can Linux function as its own ADSL modem?
I'm not sure specifically the differences between a normal Dial-up modem and an ADSL one.
Here is my problem:
I recently found an old box in the basement, which I installed Ubuntu (linux) on. I have ...
Ben
10
votes
1
answer
14k
views
Debugging slow transfer rate from server
I'm trying to explain this as simple but documented as possible. This is not exclusive to this server or my current ISP. I've seen the same exact issue over the years while being with different ISPs ...
10
votes
1
answer
507
views
Microsoft is blocking mail from entire netblock. ISP doesn't know what to do?
I recently moved a client from basic T1 service to a multi-site MPLS solution with same vendor. The ISP, XO Communications, provided a decade of stable service as a T1 provider. The process of moving ...
- 197k
9
votes
5
answers
11k
views
What benefits do a T1 line provide over "business-class" cable?
We are in a semi-rural area, so our internet connection options are pretty limited.
We currently pay about $500/month for a dedicated T1 line at 1.5/1.5 Mbps from the local ISP. In comparison, Comcast ...
- 596
7
votes
4
answers
459
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 ...
- 252
7
votes
2
answers
2k
views
ISP grade Proxy
We are a ISP in Africa (bandwidth is expensive, more than 800 USD per Mbit). Instead of investing in more bandwidth I believe it can be worthy to invest on web proxy appliance.
I prefer to use mature ...
- 1,351
6
votes
3
answers
17k
views
SMTP sent E-mail not copied to Sent Folder [closed]
I discovered that some (few) providers don't copy into the Sent folder those E-mails which are sent from mail clients through SMTP.
They only copy them to the sent folder if you send them from their ...
- 181
6
votes
1
answer
447
views
Are caching proxy servers still be helpful for saving bandwith, now that major services have migrated to https?
I live in Turkey and am part of a group planning to build a WiFi-based ISP to service my home town, as we believe it will be easier to connect all the sub-villages that are not close to our town ...
- 61
6
votes
5
answers
2k
views
Adding second firewall to ISP connection with multiple subnets?
My routing knowledge is a little rusty. I have a fibre internet connection hooked up like this:
The managed switch breaks out VLANS for transparent lan service that is also through the ISP's box. I ...
- 17.9k
5
votes
1
answer
2k
views
Carrier Grade NAT concepts: IP bans
I'd like to deploy a Wireless WAN using IPV6 for at least the wireless bits given that 6 offers higher through-put. I'm exploring the concept of CGN and what strikes me immediately is the liability.
...
- 67
5
votes
8
answers
9k
views
What equipment do real ISP's use? [closed]
In a dormitory of 550 residents, people often mistakenly set up DHCP servers for the whole network by plugging in their private Wi-Fi routers wrongly. Also recently, someone mistakenly configured ...
- 173
5
votes
4
answers
398
views
Is "Peering" in networking, always exchanged directly?
Do ISPs always exchange traffic directly through Peering? Or not necessarily true? I heard that peering is an interconnection that charged for no money (free) unlike Transit providers. If that the ...
- 61
5
votes
2
answers
6k
views
Are PTR records added only by the ISPs that provide and manage the IPs?
I am administering a network with many locations and work with multiple providers I checked out with my DNS provider to change the PTR records for one of the IPs, they replied:
Dear Sir,
We ...
5
votes
2
answers
6k
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 ...
- 165
5
votes
6
answers
14k
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 ...
- 151
5
votes
2
answers
536
views
Why are many DNS servers not returning the namservers for my domain correctly?
My website has become widely inaccessible and I don't know why.
Up until recently I have been serving my website through cloudflare, so was using their nameservers. Recently I started using Route 53, ...
- 177
4
votes
10
answers
5k
views
How do I get around restrictive email policies by ISP?
Apparently we've been restricted (though packet filtering) to some arbitrarily small and untenable number of emails a day by some bankrupt ISP (and they say that's how it's always been chortle). We'...
4
votes
3
answers
355
views
email (Exchange) issues due to lack of RDNS
I'm one of the network operations leads for an ISP and one of our business customers is complaining his emails won't work due to our lack of a DNS server. We opted not to stand up DNS since many other ...
- 121
4
votes
9
answers
16k
views
Best solution for Multi-WAN failover (inside & out)? [closed]
Looking for a way to setup 2 ISPs in failover mode, for both incoming & outgoing traffic, for our small (<100 devices) network.
The leading contender for now seems to be the Peplink Balance ...
- 277
4
votes
2
answers
813
views
My static ips are inaccessible only from CenturyLink users across all ports
The Problem:
How do you diagnose an ISP specific connectivity problem?
I host a few sites on local machine. I pay for a business class account with Centurylink and have a lot of 5 static ips. The ...
- 364
4
votes
2
answers
855
views
DNS forwarding or root hints
The author of Best practices for DNS forwarding [petri.com] recommends using the ISP's DNS servers as forwarders instead of doing the recursive lookups yourself, the main reason being performance. ...
- 5,637
4
votes
4
answers
2k
views
DDoS block source IP at ISP
During a DDoS attack even when you successfully stop it at your datacenter the link between you and your ISP will still be saturated and traffic brought to a halt.
In this case what is the best way ...
- 163
4
votes
5
answers
417
views
Requests take a really long time from certain ISP
We have an Apache server with PHP running on a virtual machine. Document roots are inside the users' home folders (/home/users/{first letter}/{username}/), and /home/users/ is mounted over NFS.
It ...
- 187
4
votes
3
answers
3k
views
IPv6 - How does my ISP know how to route traffic to my delegated subnet?
My question is somewhat related to this question: What ISP needs to provide in order to route native IPv6 /56 range to several VLANs Where that question focused on the private side of a router, my ...
- 116
4
votes
1
answer
1k
views
Can my ISP know that I am connected through a VPN?
I have a general understanding of VPNs and how they work. However, I am not sure of how the initial request is seen by my ISP? For example say I am connected to an OpenVPN provider, what happens when ...
- 145
4
votes
7
answers
328
views
business-class fiber to the home [closed]
Suppose you're some sort of crazy nerd fellow and you live in an area that's absolutely covered in fiber optics and network facilities. What kind of cost / infrastructure would be needed to hook in ...
- 884
4
votes
1
answer
343
views
Does the SOA serial have importance when it comes to ISP caching nameservers?
Lets say I forget to update the SOA serial when updating the zonefile.
Of course, this means any slaves will not sync to the master because it thinks no change has been done.
The question I have, is, ...
4
votes
3
answers
8k
views
How to get around Double NAT from the ISP?
I have a client located in a rural area where they are using the ISP Xplornet, it's a wireless/satellite type of internet connection.
After initial setup, We where able to have access to the site ...
- 203
4
votes
1
answer
227
views
Calculating and billing IP multicast usage on the Internet
I've been searching for the reasons why IP multicast isn't widely supported on the Public Internet, and a commonly-cited reason is the difficulty ISPs have in tracking Multicast usage for later ...
- 557
3
votes
4
answers
8k
views
Is a short DHCP lease from my ISP likely to cause problems?
I'm wondering if having a short DHCP lease is likely to cause any issues, such as:
Dropped VoIP calls
Dropped VPN connections
If so, could you explain why?
- 100
3
votes
2
answers
2k
views
New IP addressing from ISP
We just got a new Internet fiber service. Our ISP gave us a /30 for WAN and /29 for LAN? I have never seen this when setting up a new ISP service. I was always given a block of ip addresses (if ...
- 33
3
votes
4
answers
1k
views
Find ISP/IP address by geographic location?
I'm trying to find an ISP or IP address by geographic location, Is this possible?
- 199
3
votes
3
answers
165
views
Number of routers in small community lock up and require reboot
I live in a small town which has one primary ISP. Lately I have noticed that a number of wireless routers have been locking up and requiring a reboot before allowing any connections. This has affected ...
- 295
3
votes
3
answers
5k
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 ...
- 440
3
votes
2
answers
458
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:...
- 235
3
votes
4
answers
3k
views
Windows Updates mirror for ISPs
I work in a ISP where bandwidth is limited. We want to provide our customers a mirror for windows updates, so we can save bandwidth and provide to our customers a faster connection.
How can we ...
- 1,351