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Questions tagged [isp]

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

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PDNSr TCP client timeout

I have DNSdist balancing ~14k QPS to four PDNSr servers. DNSdist queries the backend servers via TCP. On all four PDNSr servers, I'm seeing both of the following log messages: pdns-recursor[4561]: msg=...
ross's user avatar
  • 1
-2 votes
2 answers
159 views

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 ...
Arafath M's user avatar
-3 votes
2 answers
163 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 ...
RuRo's user avatar
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0 answers
69 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 ...
Douglas Forsell's user avatar
4 votes
2 answers
507 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 ...
MS-SPO's user avatar
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-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 ...
Milan 's user avatar
1 vote
1 answer
468 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 ...
岁月倾城197's user avatar
0 votes
1 answer
492 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 ...
Miodek's user avatar
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-2 votes
1 answer
63 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 ...
Risky Ricky's user avatar
1 vote
2 answers
122 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 ...
jan ohms's user avatar
0 votes
1 answer
152 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 ...
5et's user avatar
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0 answers
107 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 ...
MrVerde's user avatar
-1 votes
1 answer
84 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 ...
SDhimar's user avatar
1 vote
1 answer
147 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 ...
Mariusz Zieliński's user avatar
0 votes
1 answer
660 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 ...
Michel S's user avatar
0 votes
1 answer
52 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? ...
Jake's user avatar
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1 answer
277 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 ...
Techguy59911's user avatar
0 votes
1 answer
14k 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 ...
user253776's user avatar
-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 ...
MaxK123's user avatar
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0 votes
1 answer
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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 ...
Nikola Novak's user avatar
-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 ...
Andrei Cristea's user avatar
0 votes
1 answer
101 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: ...
Roberto Manfreda's user avatar
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][...
concerned's user avatar
-2 votes
1 answer
466 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 ...
bishnu's user avatar
  • 1
65 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 ...
Mary's user avatar
  • 613
-4 votes
1 answer
1k 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, ...
se7enhell's user avatar
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 ...
JB_DELR's user avatar
  • 121
-1 votes
1 answer
262 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 ...
Quirik's user avatar
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0 answers
209 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 ...
bimbo1989's user avatar
  • 101
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. ...
Okok's user avatar
  • 1
4 votes
2 answers
852 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 ...
Altimus Prime's user avatar
1 vote
2 answers
400 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 ...
Kerry Hatcher's user avatar
0 votes
2 answers
392 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 ...
Jean Paul CP's user avatar
1 vote
1 answer
153 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 ...
user573959's user avatar
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 ...
Henry's user avatar
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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 ...
Nɪsʜᴀɴᴛʜ ॐ's user avatar
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 ...
John Sall's user avatar
  • 123
-3 votes
1 answer
29 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 ...
dipan gyawali's user avatar
0 votes
1 answer
202 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 ...
Drgmrsc's user avatar
0 votes
1 answer
571 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 ...
Supun Abeyasekara's user avatar
5 votes
2 answers
566 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, ...
Mark Fisher's user avatar
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 ...
Kuba Orlik's user avatar
0 votes
1 answer
253 views

VPN Tunneling through Multiple NAT environment

I currently building a DIY surveillance system based off of a QNAP NAS. The NAS will store the data, control the cameras, and act as a VPN Server for external access. I've managed to get all the the ...
Jon Salpas's user avatar
0 votes
1 answer
174 views

Is it possible to use a DNS server as a proxy? [closed]

My mobile internet provider cuts my internet service at times before it was due, I contacted them and they did nothing about it I noticed I could still ping hostnames, thus I can connect to the dns ...
user501769's user avatar
0 votes
1 answer
2k views

How to diagnose source of website blocking?

When accessing sites through my ISP, certain sites don't load. The DNS resolves fine (via nslookup; also, the hosts file is fine), but then accessing them through any port times out (eg. tracert or ...
Alex's user avatar
  • 111
0 votes
1 answer
129 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 ...
reardenlife's user avatar
2 votes
0 answers
256 views

WAN failover for local mail server

I have a question about possible failover solution for internet connection to local mail server in one small office where are problems with ISP. There is Kerio Control server with public static IP 1.1....
user2014521's user avatar
0 votes
1 answer
185 views

Under volumetric DDoS can I prevent ISP null-routing by turning NIC off briefly?

A server in a data center is getting a volumetric DDoS attack. Congestion starts to build up and the data center/ISP going to solve this by null-routing (RTBH routing) the server's IP address for ...
diviaki's user avatar
  • 103
1 vote
2 answers
245 views

Small ISP asked to whitelist all of their IPs

We are running a dedicated server as a shared hosting for ~100 clients. This week, a small ISP asked use to whitelist the range of their IPs because all of his clients can't see our websites. I'm ...
g_marchildon's user avatar
-1 votes
1 answer
615 views

How exactly the network bandwidth is calculated and in which layer of OSI Model? [closed]

We can see everyday our bandwidth is calculated by ISP's , Mobile Telecoms and Cloud Services. But how exactly they calculate this bandwidth? Do they count number of tcp/udp packets in layer 4? If so, ...
Akhil's user avatar
  • 105

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