Questions tagged [isp]

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

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-1 votes
2 answers
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How to build a carrier-neutral data center?

We need to set up a very small datacenter. This needs to be carrier-neutral. What are the things we need to do to make it a carrier-neutral datacenter? I assume that we need internet connections from ...
-4 votes
2 answers
136 views

Where is "edge compute" actually located? [closed]

Sorry, if the question is a bit basic, but I must be missing the relevant search terms, because most of the resources I could find about edge computing talk about it in abstract marketing terms. I ...
0 votes
0 answers
68 views

Networking Issue or SAAS Issue?

New here, first-time question! I am running a tracert to evv.sandata.com and I am seeing the following below. It appears AWS is not responding and I am getting a "Request timed out", from ...
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?
4 votes
2 answers
487 views

Verification: can an ISP limit regional access to a website?

As I lined out here on serverfault my web-hosters support claims the following: because they can access my subdomain from the US while from Germany it resolves to a 403 error it must me my Internet ...
-1 votes
1 answer
42 views

Secondary internet backup for ISP blackout

We have a internet backup when 1st internet get shutdown(outage), but during ISP blackout the internet doesn't switch because its set up in a way to ping the default gateway but u can still ping it ...
1 vote
1 answer
313 views

How to add a PTR (Reverse DNS) on Vultr? Do I need to contact them?

I have set up a Postfix Dovecot email server on my Vultr. And I'm getting following message from Google: gmail-smtp-in.l.google.com said: 550-5.7.1 Our system has detected that 550-5.7.1 ...
0 votes
1 answer
169 views

If I relocate my website's server (changing the IP in the process), will my users be able to access it under the same domain?

If I first publish my website from my server which is in city A, and then move this server to city B (which I expect to change its IP address), will the website's users still be able to access it ...
-2 votes
1 answer
55 views

What can my ISP know about a website hosted at my house? [closed]

I am hosting a public website, say example.com, at my house using my home Internet (fyi, the contract allows it). My Internet plan also comes with a static IP. I use CloudFlare to hide the server's ...
1 vote
2 answers
96 views

Filter CGNAT IPs from Log

I want to identify heaavy users on a web API I would like to ignore CGNAT IPs . I looked at https://www.rfc-editor.org/rfc/rfc6598 Is this mandatory or can an ISP use any given IP ? Is there a List ...
0 votes
1 answer
124 views

Self hosting/Colocation multiple VMs with public IP addresses on single server

I have a single server that is running some VMs. I want each of these VMs to be accessed through public IP addresses correspondingly. I'm looking into hosting the server on my own and get a block of ...
0 votes
0 answers
92 views

Setup new router with SQM - Buffer Bloating solution

Scenario. I'm in Tbilisi, Georgia. I have very high ping to EU servers(100ms+) plus a huge buffer bloating problem, this test gave me the F rank: https://www.waveform.com/tools/bufferbloat I use an ...
-1 votes
1 answer
68 views

Virtual IP in Single Server [closed]

I want to setup as below I have two ISP with different static IP, terminated in single server with two NIC, make virtual IP for this NIC, want to bind my local web serve to this Virtual IP, so that if ...
2 votes
1 answer
4k views

OpenWrt allow IPv6 rule to access a server with global IPv6 on local area

First of all, I have a domain with dns configured to point to my device global address witch is set to static with my ISP gloabl prefix as xxxx:xxxx:xxxx:de01::3/64 in dhcpcd.conf. I'm using Openwrt ...
3 votes
2 answers
762 views

Is it worth sending abuse mail?

I have been running my own e-mail server for a while, and I noticed that scanning for open relays has been on the rise during the last days. So I whipped up a little script that parses postfix logs, ...
1 vote
1 answer
128 views

Migration from IPv4 to IPv6 - stable internal service addresses

ISP provides 64 bit variable prefix to my home network using DHCP-PD. With IPv4 and NAT I could create stable (fixed subnet) internal network with DHCP, internal DNS and some static routes to subnets ...
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 ...
0 votes
1 answer
624 views

Load balancing ISPs without double NAT [closed]

I configures my TP-Links ER605 multi-wans router to load balance between my two ISPs (that is working). But since my Web/NAS server is behind my router on the 192.168.2.0 network, any computers on ...
66 votes
7 answers
10k 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 ...
0 votes
0 answers
141 views

Website will not load for certain ISPs

My website will not load correctly for certain ISPs. I have verified with both the DNS provider and the website host that all information is 100% correct. However, certain internet providers yield ...
0 votes
1 answer
51 views

Is rejecting email based on IP address in chain allowed?

A major ISP is rejecting email (bouncing with error 550) on the basis that an IP address in the transmission chain is on their 'blocklist'. Are they allowed to do this and still be IETF compliant? ...
1 vote
2 answers
2k views

Unknown private IP addresses tried to log in to my router's admin panel

I noticed some weird traffic in my router's admin panel logs: 2021-03-25 06:27:19 [Critical][Config-Log] Terminal:WEB(10.181.189.71),Result:Fail,Type:Login,Username:- 2021-03-25 06:27:22 [Critical][...
0 votes
1 answer
191 views

How to find out DNS Server IP of other ISPs

I am currently building a tool that needs the response from multiple different DNS Servers. The programming part is all done but I am currently lacking the IP Addresses of major ISP DNS Servers. All I ...
0 votes
1 answer
12k views

TCP DUP ACK/Out-of-Order/Previous segment not captured/Retransmission flooded on wireshark logs

Due to slow network, I installed wireshark on the device(laptop) to find this This is a log of the device using internet(Downloading a file),as you can see at the right end of the screenshot, the ...
4 votes
3 answers
9k 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 ...
11 votes
5 answers
40k 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 ...
2 votes
1 answer
19k views

What is the purpose of multiple ethernet ports on my modem? [closed]

My office has a static IP and I wanted to set up another one. After calling up my ISP and getting another static address, I tried to plug a second router into my NetVanta 838T modem, but could not ...
0 votes
2 answers
5k views

Can't connect to specific IP address and/or TCP port - can the ISP be blocking it?

I have a RDP user who has successfully been using RDP from his laptop to his workstation in our office when he is at home. It is configured to use our public IP and port 10378 and has been working ...
-1 votes
1 answer
1k views

Router doesn't have a public ip adress

I have a problem with my ISP where my router gets a different ip adress compared to my external ip adress (the router doesn't have a public ip adress). I previously setup a VPN service with EdgeMax ...
0 votes
1 answer
75 views

What is this private LAN address accessible through my ISP?

Recently some websites I regularly visit (most recently docker.com, atlasobscura.com; both of these sites return an issue with a fortinet-ca2 certificate) have started showing certificate issues on my ...
-2 votes
1 answer
111 views

How medium-sized servers are connected to the internet?

I'm curious about how the servers are connected to the internet. Suppose I develop a web application that requires multiple machines to provide services. For example, I want to host the frontend on a ...
0 votes
1 answer
99 views

Unable to route ports, ISP assigned private address - connection down issues every 4 hours

I have a big problem, I live in an area where there is no fiber or ADSL connection and I connect to the internet using a 4g+ sim in a 4g+ router (Tp-Link Archer MR600). The connection is just fine: ...
-2 votes
1 answer
450 views

how to configure static lan ip to different router provided by isp?

We have got Vodafone Internet ISP. We asked for 5 public ip's. They had provided 1 wan ip and 5 lan ip pool. WAN Configured and internet working but LAN ip how to use, i need 5 static ip address to ...
3 votes
1 answer
448 views

Authentication and logging of users for a Wireless ISP?

I have to upgrade a Wireless ISP's (WISP) network. Their current setup consists of a router (Mikrotik RouterBoard 1100AHx2), Ubiquiti Rockets (with sector antennas) for clients, and Ubiquiti ...
0 votes
2 answers
1k 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 ...
-4 votes
1 answer
867 views

Domain blocked by ISP

ISPs blocked my domain in one country. It redirects to an IP address that the ISP uses to block access to sites it blocks. (https://ispipaddress:8080/mydomain.com) The URL cannot be accessed directly, ...
-1 votes
1 answer
247 views

Which tool ISPs use for browsing logs?

It is known that ISP has to log various network data for various purposes, such as law enforcement needs. However, what are some examples of software tools used by ISPs to browse this huge amount of ...
0 votes
0 answers
193 views

How to check if my server's IP has somehow been blocked by some ISP?

I have an app, published on Play Store and App Store, that works via API with our webservices. Nothing fancy, really really basic stuff. Now, some customers can't use the app because it can't reach ...
0 votes
1 answer
39 views

PTR recored Issue

We have 2 Mail servers ( Internal and External) the External is hosted by ISPA with ip address of 62.xxx.xxx.xxx, we use to have the internet from the same ISPA, and the PTR record is already setup. ...
4 votes
2 answers
839 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 ...
1 vote
2 answers
388 views

Does an IPSEC tunnel establish new sessions for traffic?

Background AT&T business fiber is basically rebranded U-Verse home internet. The "modem" (it's actually a router, but lets call it that for simplicity) has a hard limit of about 8K ...
0 votes
2 answers
343 views

Losing connection to servers after 5 min (different ports)

A month ago I moved and made a new contract with a new ISP (Claro Peru). Since I switched from ISP I noticed that my connections to servers are always cut after 5 minutes of inactivity (Connections to ...
1 vote
1 answer
135 views

dual ISP firewall cluster in linux

For the past couple of weeks i have been trying to figure out how to make firewall cluster, each having different ISP. I have found few guides on how to do it with one ISP using technologies like ...
0 votes
1 answer
1k views

| rDNS | IP gets resolved with a wrong hostname

I've been trying to set up rDNS so my IP could get resolved to my hostname in a program which has a built in rDNS lookup feature. I had done everything I was suggested (ask my ISP to make a PTR record ...
0 votes
1 answer
461 views

Preventing Script Injection from ISP (Proxy Analyzer) through VPN

I'm using Sophos SSL VPN Client. But I'm using BSNL ISP. Whenever I connect my VPN and browse any HTTP non-secured websites ADS gets injected into the JS script file. But when I disconnect a VPN and ...
0 votes
1 answer
40 views

How to make old router as access point? [closed]

I have installed a new router at my home, the new router has 4 ports. And the ISP only allowed for one port to have internet connection using ethernet. That port is taken by another person, and now ...
-3 votes
1 answer
28 views

i want to visualize myself about bandwidth of internet [closed]

as we know bandwidth is just a way through which data flows.20 Mbps internet means 20 mega bits per second and 40 Mbps means 40 mega bits per second.i guess 20 Mbps means 20 Mb of data is retrieved in ...
0 votes
1 answer
126 views

VNC ISPSystem glitches on high resolution

I am trying to perform an installation of Android x86 8.1 RC2 on VPS through the means of ISP panel, via VNC. Here is what I see in any VNC client (noVNC, VNC Viewer): Such a bug only appears after ...
0 votes
1 answer
180 views

Gateway failover

I have an Ubuntu server acting as a gateway for inbound internet connections. This server shut down unexpectedly because of overheating and lost all internet connections during business hours. How can ...
0 votes
1 answer
556 views

Can my ISP detect what YouTube stream quality i play on my device [closed]

I would like to know if there is a way that my ISP can detect the youtube stream quality I use on my device. For Example- When I watch youtube video in 360p resolution and I move to the 1080p ...

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