Questions tagged [isp]
Questions relating to the operations of ISPs and interacting with them.
143
questions
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0answers
11 views
Connect a modem to a different coaxial point from the modem-router of my ISP in the same circuit [closed]
I'm looking for opinions from experts.
I'm trying to use a modem-router (the device installed by my ISP) and a modem that I bought personally on the same circuit.
Is this possible?.
I don't like ...
0
votes
1answer
24 views
How does ISP know which port to open for incoming answer from a site requesting, since sites answer in different ports from ones we ask? [closed]
I'm wondering how does ISP open door for incoming answer from a requesting site since the answer doesn't come from the requesting door, and how to achieve my computer IP since it's behind ISP firewall,...
1
vote
2answers
36 views
Modems involved in dial-up connection
I am currently studying the textbook Computer Networking -- A Top-Down Approach (7th Edition) by Kurose and Ross. In a chapter on Home Access: DSL, Cable, FTTH, Dial-Up, and Satellite, the authors ...
0
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3answers
90 views
Single-homed connection to ISP without NAT feature
Is it possible to connect my private network to the ISP router without a Network Address Translator (NAT) feature enabled on my router? As I understand, in a single-homed scenario connection to ISP, ...
0
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2answers
54 views
WiMax technology
Does WiMax technology is used by an ISP for providing cellular internet services?
Are WiMax technology different from cellular technology for providing internet? Please mention the difference if ...
0
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1answer
87 views
ASA ISP limit of ISP Speed
I've got configured ASA with two ISP.
First is main ISP and second for backup.
Is possible to set on conf of ASA if the speed of main ISP will be at low bandwith, ASA will active a backup ISP?
0
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1answer
112 views
Reasons for buying ASN for organisation that are located at single place
I see here that even some organisation/universities have bought ASN which are located at single location. What benefit they will get by buying ASN ? Is it compulsory to buy ASN if I have to buy some ...
0
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1answer
38 views
What technique is my ISP using to censor web traffic? [closed]
BBC news is censored in the country where I live. Out of interest I decided to briefly look at how this is done.
First of all they apparently MITM DNS - if I look up BBC domains on Google's 8.8.8.8 I ...
5
votes
1answer
188 views
What does NAT64 do which can't be done by deploying IPv6 + NAT444?
Why was NAT64 developed? What does it do that can't be done by deploying IPv6 + NAT444, and allocating your customers a (public) IPv6 and a (private) IPv4 address (behind a shared public IPv4 address)?...
2
votes
2answers
73 views
How to know if ISP network have multiple routes
When it is time to choose an ISP in a remote area, I hope that the chosen ISP is having an acceptable redundancy in his network.
Is there any way to verify all different route an ISP is having in his ...
0
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1answer
52 views
Map of WAN cables in general [closed]
Whenever i search for the physical location and path of WAN connectivity, i only find submarine cables, and a site that seems like a paid service. Is there no free map where i can e.g. show the route ...
2
votes
2answers
326 views
How does cellular data differ from an ISP, and what can be tracked?
Are IP addresses given to a phone static or not?
Also, how can phone companies keep track of a person if they wanted to find them? For example, I don't have an account and use a pre-paid card.
I'm ...
3
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1answer
109 views
Public and Private IPs
I wondered if someone could explain this to me.
At work we have a firewall that connects to the Internet and has an external IP configured on it via DHCP. The firewall's WAN port connects to an ...
-2
votes
1answer
198 views
How do i find out if a LAN is behind a multi-level NAT? [closed]
Not much i can specify here - its obvious that my CPE is NATing my LAN, but how do i find out if my ISP is using a carrier-grade NAT (obviously, without asking them)?
I heard that port forwarding is ...
7
votes
2answers
983 views
How do routers on the backbone avoid IP address conflicts?
As the title suggests, how do ISPs, and other networks connected to the backbone ensure that their host network address isn't already in use by another backbone node, as there is no controlling device ...
1
vote
1answer
98 views
Which part of an IPv6 address is assigned by the RIR?
Given my PC or any other, which part of the IPv6 address is allocated by the RIR and which part is allocated by the ISP?
I know a prefix of /64 is commonly used, does that mean the bits before the /...
0
votes
1answer
277 views
In one organization having two ISP which configured on fortigate firewall ? How can we do the failover for internet?
Organisation don't have AS number .As of now we are doing manually route for any ISP at a time.
when default Internet link is go down that time making second link enable on firewall.
I saw the some ...
3
votes
1answer
126 views
WISP Network Edge Device - Router vs Switch
I am faced with an issue right now working for a small rural WISP. We have roughly 250 wireless customers throughout our area using Ubiquiti radios. Our main fiber drop comes in from a larger ISP on ...
2
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4answers
234 views
Can I make 2 ISP providers' IP addresses into 1 IP address?
We have 2 ISP providers (X, Y) and we have connected the ISPs to a core switch>Sophos firewall>Switch rack>end user (LAN & WiFi). This ISP works on fail-over mechanism.
The issue here is that we ...
1
vote
2answers
98 views
Can large ISPs really offer 1Gb “dedicated” service to every home and business?
Hopefully this is on topic for this site.
While researching synchronous carrier service, so called EDIA or Ethernet Dedicated Internet Access, to a rural location in New Hampshire, USA, I came across ...
5
votes
2answers
894 views
Internet structure and ISP networks in detail
I am studying about internet structure, ISPs and their interconnection. However, I have trouble connecting some terms and understanding the greater infrastructure of internet in more detail. I will ...
1
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1answer
67 views
Pros and Cons of two different ISP connection Model
I have seen two different models to connect My Server to cloud.
Model 1:
DNS ------|
|---ISP_Router---Cloud----DSL Modem---Office_Router---Switch---My_Own_Web_Server
Google ------| ...
18
votes
2answers
3k views
Is it common for ISPs to connect to each other directly?
I'm reading up on the relationship between latency and ISP interconnectivity (that higher ISP interconnectivity results in lower latency, which makes sense to me).
My understanding is that IXPs ...
1
vote
0answers
97 views
Different Source and Destination IP to and from ISP [closed]
Could somebody tell me which model the ISP are using ?
I have a leasedline WAN with following information.
IP: XXX.XXX.XXX.123
Gateway: XXX.XXX.XXX.126
Subnet: 255.255.255.248
The problem is every ...
1
vote
1answer
128 views
How can I use a firewall as Internet Breakout?
I am currently installing a firewall in my company (using OPNsense) but I was asked to use the same system as "Internet Breakout" as well. Does anyone know how to accomplish this?
I understand that ...
1
vote
3answers
514 views
Would it be possible to split ISP connection via Switch?
In my current setup, my ISP is directly connected to my firewall. Now I want to add a PC that I can put Static IP to test the ISP directly outside of the Firewall. would this be possible? I have 5 IP ...
3
votes
1answer
290 views
ISP lab GNS3 - BGP route exchange
I'm trying to develop an understanding of the WAN/ISPs. Eventually I'll build up to MPLS, but for now I'm trying to lab up a notional, basic ISP:
R1, R2, and R4 are PE routers. They've successfully ...
5
votes
2answers
2k views
Layer3 vs Layer2 LACP
We have ISP link 4x10G LACP Layer2 and now we are upgrade to to 8x10G LACP, currently i have created VLAN interface to terminate that link because it L2
Now i have option to decide to go with L3 or ...
0
votes
1answer
46 views
Discovering public ip from wifi signals, shodan, parent router NAT [closed]
MAC addresses innately do not change right?
and you're able to scan for broadcasting APs where you'll be able to detect different nearby mac addresses of each AP..
Public IP addresses change, ...
1
vote
2answers
80 views
Can ISP know whether port forwarding is been done? [closed]
I sit behind a NAT of an institute, which has a rule that implies that no port forwarding can be done.
I am developing a peer to peer application, which I need to test. So I have to be sure that it ...
3
votes
2answers
189 views
BGP source base routing question
This question is little convoluted to explain but i will try my best, I have following scenario.
I have one ISP and i am getting 2x40G drops which you can see in diagram Link-A and Link-B (Both ...
1
vote
1answer
164 views
What are the significance of different types of routers?
Initially when I started learning networking, I understand the 'Switches' and 'Routers' are the core components of networking.
As I started getting more into networking, I started hearing different ...
1
vote
1answer
431 views
Question about BGP peering with your ISP
In you case you want to get rid of the static default route and you want to peer with your single ISP, do you need to announce any routes for your side ? I have the below config, is it enough for ...
4
votes
2answers
395 views
What provision does DS-Lite, as used by ISPs, have to provide IPv4 blocks to CPE?
I run a small ISP for a rural community in England. There are around 350 residential properties and 15 small businesses. Three of these businesses run systems that require two consecutive IPv4 ...
4
votes
1answer
171 views
Very confused with routing
I'm having a hard time understanding some "basic" things...
I know a bit about configuring routing using CISCO packet tracer exercises (static routers, rip, ripv2, ospf, eigrp), but I have a doubt ...
1
vote
1answer
641 views
Why would the local address in case of mobile data network not a private IP address? [closed]
I have connected my smartphone to internet over 4G through Airtel (ISP)
I did - "What's my IP" on google.
And below is the screenshot i obtained-
I understand the public IP address is in the range ...
2
votes
2answers
170 views
can we do bgp route in cisco 2821 router?
I have a cisco2821 router and it has connected to one Internet service provider. Now i need to buy another one router so that i can have another Internet provider which can help me when one primary ...
0
votes
2answers
112 views
What is this device? [closed]
I'm trying to create a map from a network based on some photos of a rack.
And I need to know what is this device, apparently it's the entry point for one of the ISPs.
I'm not a network expert
1
vote
1answer
86 views
Can I run a VPN faster than internet using custom router + optimized protocol other than TCP/IP?
If I make a VPN using a custom, optimized hardware router, running a customized routing protocol much more efficient than TCP/IP, put it in place of the router my ISP gave me, then is it possible to ...
0
votes
1answer
2k views
link-monitoring in fortigate
]3i am trying for a failover between two ISP interfaces using link-monitor in fortigate. both ISP links are vlan interface ( ie, not physical). and with my primary ISP, i have eBGP. i need to monitor ...
8
votes
2answers
3k views
Single Public IP Address for multiple physical locations
Is it possible to get or set up a public IP address that is load-balanced between multiple physical locations or sites? It may be something like a virtual IP address (VIP), which points to multiple IP ...
1
vote
2answers
97 views
Firewall has only one port. How can I properly NAT to ISP on a Layer-3 switch?
My firewall, an iptables Linux box only has one Ethernet port.
My network topology is pretty simple and looks something like this:
ISP (Port Gi 1/1) -> Switch <-Firewall on Port Gi 1/2
...
1
vote
1answer
273 views
SONET/T-Carrier differences - MPLS/VPLS bandwidth
Could someone explain to me simply what is the difference between SONET and T-Carrier?
I know that the ISP generally uses SONET on their infrastructure (Ciscopress 2017, 1.2.1.2 section, http://www....
1
vote
1answer
341 views
Cisco VRF with two ISP
I am posting this question to get better understand of VRF on Nexus switch.
This is the scenario i have 10G_A link from my ISP running BGP on it, now i need more capacity so order second 10G_B link ...
1
vote
1answer
333 views
WAN lines types - understanding leased line/circuit
Studying the WAN lines types, am I right regarding the statements below, or if not, could you correct me please:
A real leased line, could be performed with TDM on a line with for example SDH, TDH or ...
0
votes
1answer
80 views
Is it possible to configure router to prioritize “normal” network usage over “torrent” downloads high network usage [closed]
I have a typical problem of having a shared connection with many people.
The connection provided by my ISP is good enough to service many people (50mbs). However, every now and then, when someone ...
1
vote
1answer
133 views
route vlan traffic to isp on Dell OS9
I just got a layer 2/3 switch from Dell, S3048-ON with OS9 version 9.13(0.0)
I'm trying to route vlan 20's clients to my ISP to reach the internet in vlan 10
This is my exact configuration:
Port ...
3
votes
2answers
130 views
What does ISP's Internet speed actually mean
Sorry if it's irrelevant for this forum, but I couldn't find any good answers online.
I know that "Internet speed" isn't a stable thing, and the rate of getting a something online, for example ...
1
vote
1answer
140 views
diff btw PTSN and DSL?
I have seen DSL compared to PTSN (public switched phone network).
What are some of the major differences?
Is there anything about this answer to a similar question [https://www.quora.com/What-is-...
0
votes
2answers
609 views
How to build a ISP (Internet Service provider)? What are the core components required? [closed]
I am trying to understand the cost of building an ISP. The core components required, licences, backbone and any leases. I have searched a lot on the internet and i am not able to figure out the basic ...
