Tagged Questions

Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form: 192.0.2.235

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1answer
14 views

Windows 7 Home Premium cannot connect to internet via wireless or ethernet connections

I have an HP laptop and I cannot connect to the internet even though it says "Internet Access". When I try I get "Cannot access page", then the browser closes and searches for a solution that results ...
1
vote
1answer
27 views

Different servers on the same port ipv4 / ipv6

Say I have two TCP servers A and B. A is an ipv4-only server listening on 127.0.0.1:10000. B is an ipv6-only server listening on ::1:10000. Can I start these on the same machine? That is, how are IP ...
0
votes
1answer
24 views

Why doesn’t Windows Vista get an address from the DHCP server?

My Windows Vista PC does not get an IPv4 address from the DHCP server; viewing the network properties shows something (likely the DHCP request) being sent, but no packets being received. Manually ...
0
votes
1answer
20 views

Disable autoconfiguration of new network interface on Linux desktop

I am running Ubuntu Linux (desktop) and whenever I insert an external network card to my computer, it automatically creates a new interface (that is okay) but also instantly giving the interface an IP ...
0
votes
2answers
19 views

Definition of 'send_redirect' in Linux IPv4 context

I've encountered these two lines in a script: echo "1" > /proc/sys/net/ipv4/ip_forward/ echo "0" > /proc/sys/net/ipv4/conf/eth0/send_redirects The first line switches on ip forwarding, which ...
4
votes
2answers
572 views

Why does “ipconfig”not work in my windows 8 elevated command prompt? [duplicate]

Im needing to find my ipv4 address to make a server because my old one was on windows 7 then i upgraded to windows 8, which i now regret because i cant find my computers ipv4 address when i type ...
0
votes
0answers
26 views

ISP Causes for huge packet loss to gateway

I have an office router with a static IP address (i.e. 208.55.14.1/30), connected to the ISP gateway (i.e. 208.55.14.2) via ethernet. The setup has worked perfectly for other a month, today i started ...
2
votes
1answer
184 views

Throttled download speeds on new router with Comcast (ipv6 vs ipv4)

Issue with Comcast cable on Linksys or Cisco routers (and others) involving throttled download speed on ipv4. I recently upgraded my internet service to 100+ Mbs and also upgraded my router to ...
0
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0answers
114 views

CentOS 7 can't get IPv4 address from DHCP server

I have classroom full of computer running CentOS 7 and only one computer can't get IPv4 address from DHCP server during boot, because NIC is not yet up, when dhcp client tries to get IPv4 address from ...
0
votes
2answers
41 views

IPv4 and IPv6 from different browsers on same computer

On my laptop, in Chrome, when I Google "What is my IP?", I get an IPv6 returned as my public IP address. On the same laptop, in Firefox, I Google the same thing, and get an IPv4 returned as my public ...
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votes
0answers
18 views

windows 7 has ipv6 connectivity but not v4

My wife's windows 7 laptop had network connection problem out of the blue yesterday. It can access google sites like youtube, but nothing else. When I troubleshoot, I found that it has IPV6 ...
0
votes
1answer
79 views

Cant ping to computer but reverse ping can

So Computer 1 can ping to computer 2 but reverse it can't Setup : router A (192.168.0.xxx) 255.255.255.0 > Router B (192.168.1.xxx) 255.255.255.0 So computer1 on Router B can ping to computer2 on ...
2
votes
1answer
45 views

Limit on hops in IPv4 and IPv6

I was reading IPv4, and in it it specifies time to live, aka TTL or "max hops" in IPv6 since this is what it really represents. My concern is that this value is 8 bits, thus has a max value of 255, ...
0
votes
2answers
122 views

Two IPv4 adapters in same PC on same network valid?

Is it valid to have two network adapters on the same PC have the same network portion in their IPv4 address? If not why is my DHCP server doing so and how should I setup my DHCP server to have it ...
0
votes
0answers
66 views

Dilemma about how my wireless devices obtain IP address

Currently in my network there are 7 wireless outdoor equipment and 1 switch . This switch act as backbone switch for my network as internet supply from ISP is connected to this switch. Through this ...
0
votes
2answers
65 views

What does a network packet consists of?

I know basic networking but I am not very good at it. Now I am calculating how many packets will be lost if I use UDP over IPv4. I can assume that the protocol overhead for data sent via UDP over IPv4 ...
1
vote
0answers
39 views

Why doesn't my DNS change propagate within the TTL?

Why isn't my DNS propagating correctly? It has a TTL of 3600 seconds, 1 hour, yet it is still resolving to an old IP. It's been at least 10 hours! http://www.onlinedig.com/go-dig/ C:\>nslookup ...
4
votes
2answers
493 views

Why is tracert showing a private IP address right after my router, even though it has a public IP?

Here is a log of tracert superuser.com from my computer: Tracing route to superuser.com [198.252.206.16] over a maximum of 30 hops: 1 2 ms 2 ms 2 ms 192.168.1.1 2 11 ms 17 ...
1
vote
1answer
84 views

NAT in local IPv4 to extern IPv6

I have a cable router with an outgoing IPv6 address. In my lan I have IPv4 addresses. I want to access to my local server from internet. I am not familiar with IPv6, is there something like NAT? ...
1
vote
1answer
273 views

add multiple static ip addresses to a server with systemd-networkd

We have a server with multiple IP adresses. Lately we migrated to systemd and we still need mutliple IPs on that server. With systemd-networkd we have some trouble finding a configuration example. so ...
2
votes
1answer
311 views

static IP outside of subnet range

I have two questions, but let me explain the situation first. They are about the (static) IP address of a printer attached to the network. We had this networking setup, using a normal consumer router ...
-2
votes
1answer
90 views

Why are we still stuck on IPv4 when we are IPv6 ready? [closed]

With IPv4 finally just about out, why is it so hard to switch over to IPv6? My entire home network is IPv6 and the switch over was easy. Is it a hardware problem that keeps IPv6 from taking off? From ...
5
votes
1answer
606 views

Exactly how many valid IPv4 addresses are there?

Seemingly simple question, with enough edge and corner cases that I don't trust my ability to calculate it. What is the exact number of valid IPv4 addresses that could potentially be used as ...
0
votes
2answers
75 views

How to find largest possible IPv4 network within specified range

Let's say, we are given a range of 192.168.101.64 - 192.168.102.128. What is the easiest way to find the largest possible IPv4 network within specified range, including network address, subnet mask ...
0
votes
1answer
34 views

Identify the TCP/IP classes respectively by beginning octets

I am busy studying for a network exam and I am stuck with this zinger: By studying the following beginning octets, identify the TCP/IP classes respectively 1-126 224-239 240-254 ...
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votes
0answers
476 views

Default Gateway IPv6 but IP set on IPv4

I have a client who has a network setup. I have a couple of devices which work on the network using socket communication which I want integrated onto their network. There is a PC which is to be made ...
3
votes
2answers
68 views

Is it normal for a hosting service to require that I buy a public IPv4 for using my own $25 certificate?

Self explanatory title, I guess. I'd love to have my website in https only, but they (the web hosting service) claim in the administration that I need to buy a public IPv4 address from them before ...
0
votes
1answer
477 views

How to deal with Dual-Stack Lite and incoming connections

My ISP (german cable ISP Unitymedia) forced me to use DS-Lite / Dual Stack Lite because he ran out of IPv4 addresses. Common problems with that setup are: interrupted connections (i.e. in online ...
2
votes
1answer
161 views

IPv6 only LAN with NAT64 router for Internet

I want to disable IPv4 on my LAN and run only IPv6. I will use a NAT64 Juniper firewall to provide Internet access since I only have IPv4 Internet. Will this break applications? Will I be able to ...
0
votes
0answers
31 views

Win8.1 machines have trouble browsing each other occasionally

I've got two Win8.1 machines. One is a desktop connected to the (dd-wrt) router through an ethernet cable, the other is a laptop that connects over wifi. Both can ping each other just fine through ...
82
votes
1answer
5k views

Strange dotless decimal notation of IP address… How does it work?

Earlier today I thought I had a URL in my clipboard, but I actually had four 9 digit integers copied from a spreadsheet, which were identification numbers from a proprietary system. Completely ...
1
vote
0answers
33 views

Failed Wireless

Sorry i'm not good with computers so my tech. talk is limited. I have a presario CQ62 Notebook PC. 64 bit: Yesterday I went to the local Library to use some free internet. When I returned I could no ...
2
votes
2answers
175 views

Is it possible to change my IPv4 address?

At home, when I type in ipconfig in the command line, I would find that my IPv4 address is 192.168.8.x. However, at office, when I type in ipconfig in the command line, the IPv4 address is ...
0
votes
0answers
51 views

Use rtpproxy as a NAT on openIMSCore

I have some problems, I want to ask about rtpproxy and OpenIMSCore server. Actually I want to make IMS running like this: client IPv4 -- > OpenIMS <-- ipv6client. I want to use RTPProxy as NAT, so ...
1
vote
2answers
80 views

Is there any chance to reassign an IP address assigned to a city to another city/region

Is there any chance to assign an IP address that previously assigned to another system in another city. Or it's fixed for a specific region/city. Suppose my current ISP assigned 106.52.214.255. When ...
1
vote
2answers
106 views

Can IPv6 traffic pass over an IPv4 network? [closed]

Consider the case where there are 2 computers using the IPV6 protocol that want to communicate with each other, and the packet(s) must pass through a network that uses the IPV4 protocol. Can the ...
1
vote
1answer
80 views

What is the difference between IPv4 and IPv6 in terms of binary?

I know this question is for entry level users. That I am. New to this world and finding it very interesting. I have done some research on IPv4 and how to convert IP addresses to binary and vice versa. ...
1
vote
1answer
167 views

LAN and WLAN networks under same IP range

I'm a newbie in network stuff and haven't enough knowledge to do what I'm wanting for now, so I need your help, please. I've two networks, a wired and another wireless. The wired one is between two ...
2
votes
2answers
914 views

Doubt In default time to live (TTL) 255?

I know that,The Default Time to live value is 255, each time a ipv4 packet crosses a router that value is decremented by 1. But,When I ping my adsl router it shows TTL as 64 Pinging 192.168.0.1 ...
0
votes
1answer
925 views

Dynamic DNS for both IPv4 and IPv6 (using freedns.afraid.org or others)

I want to set up dynamic DNS on my Fritz!Box 7490, so that it is reachable both on IPv4 and IPv6. Note that I want to reach the Fritz!Box itself, and not a computer behind it. The scenario is that I ...
0
votes
0answers
38 views

Block IPv4 peers in deluged?

Is it possible to block all IPv4 peers and allow only IPv6 peers in deluged? Or can I modify torrent file to accept only IPv6 peers?
1
vote
1answer
979 views

How to get network ip address via windows command prompt?

How to get network ip address via windows command prompt? I know tat ipconfig /all shows ip configuration, but what about having just ipv4 adress?
0
votes
2answers
51 views

Ways to differentiate between home and office private network

Let us consider there are two networks 1) home network and 2) office network. I have an application which will get the system IP and MAC Address of the installed machine while launching the ...
4
votes
1answer
228 views

Why does writing IP addresses this alternate way work, and is there a practical use case for it? [duplicate]

Recently I saw an incorrectly typed telnet command, and I saw that "regular" numbers were interpreted to IP addresses. I tried this myself in Windows and the same behavior is shown there, so obviously ...
2
votes
2answers
2k views

Unable to ping broadcast address

Host address: 192.168.0.13 Network: 192.168.0.0 255.255.255.0 Router: Cisco DPC3825 DOCSIS 3.0 Gateway (user manual) My home network uses the 192.168.0.0 /24 network for my (mostly wireless) ...
3
votes
2answers
120 views

How does the separation between IP addresses on the internet and on the LAN work?

Complete newbie question: Say for example the address: 8.8.8.8 How does the computer know that this address is on the internet, not the local network? Could a device on the local network have the ...
4
votes
1answer
61 views

VirtualBox not allowing me to modify IPv4 Network Mask?

I use Oracle VM VirtualBox to run a web server on my machine. I had it set up and working perfectly for a while. For the past few months it's been prompting me to update, and I finally gave in and ran ...
0
votes
1answer
69 views

Is there a command that allows me to set a prefered IP Address for an adapter? [duplicate]

I've got some customers who should use a specific IP in their network adapter, but manually setting it is a pain sometimes. So I would like to know if there's a shell command / batch that allows me to ...
0
votes
0answers
1k views

No DNS requests in Windows 7, nslookup works, ping and tracert can't resolve

I was trying to bring my old desktop computer back from the dead and faced a problem I couldn't deal with. The main issue is what I've written in the title - nslookup works, ping and tracert give a ...
0
votes
0answers
217 views

APIPA (169.254.*.*) being assigned even with DHCP off in Windows 7

I've one eth interface on my home Computer which has two IPv4 addresses assigned. I use static addressing not DHCP. I am not assigning the 169.254.. manually, it's being assigned by something in my ...