Questions tagged [ip]

The IP (internet protocol) is a protocol for transmitting data over packets ("datagrams"). It is the primary protocol of the Internet. "IP" may also refer to an IP address, the numerical address assigned to an IP-capable device.

734 questions with no upvoted or accepted answers
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how will DNS work under this circumstance (when no domain name specified)

Supposingly there is a host/server in the network with FQDN as "host1.example.com" Can i know what will happen when i on another workstation, do a "ping host1" assuming that host1 is not recorded ...
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IP forwarding between two interfaces on Windows Server from Linux box

I have two VMs, one Ubuntu Server and one Windows Server 2016. On both machines I have a virtual switch with NAT (Hyper-V vSwitch on Windows) with Docker containers connected to them. On Linux my ...
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2answers
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Windows 10 IP Forwarding

I am trying to provide Windows 10 with router capabilities(IP Forward). Yes I know I could buy a router or switch. This setup is for TESTING only. Found a good resource: http://www.home-network-...
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1answer
3k views

Assign IP address to a Virtual Printer

Is it possible to assign an IP to a virtual PDF Printer? Is there any Virtual printer software that automatically can do this?
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ipconfig /release (AUTO RENEW???)

I have a (very very) remote machine running over teamviewer, I (mistakenly) ran ipconfig /release The machine is set never to sleep or restart and no items are set to power saving mode. The only ...
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8k views

ssh connect to host X.X.X.X port 22: connection refused

I am not able to connet to any remote server. It shows up this error. I am able to ping the same ip address. Also I checked sshd is running : sudo service sshd status ssh.service - OpenBSD Secure ...
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0answers
94 views

Virtualbox machine cannot ping its own public IP

I have a strange problem. I have a bridged network adapter on my virtualbox machine (Kali Linux) - with assigned IP address with my local LAN pool (192.168.0.22) and I can ping e.g google.com (DNS ...
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0answers
6k views

Finding IP Address from MAC of a device in a different subnet

I am new to networking as such, but I have been searching a lot about the problem of finding IP from MAC for the past couple of days. I have a device whose MAC address I know and I have an Android app ...
3
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1answer
367 views

Xen VPS with 2 IPs from 2 different subnets

I am new to Xen and I am trying to understand how to add 2 different IPs on the same guest VPS. First, I am going to explain my node setup, which is a physical server with 32GB RAM and 2 NICs on it. ...
3
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2answers
3k views

Why won't my DHCP addresses “stick”?

I've been having some addressing issues that I've been unable to solve, and I'm hoping I can get some guidance about other things to research. Service provider is Time Warner cable. A static IP is ...
3
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1answer
510 views

Connected via UMTS but can't ping default gateway

I have a UMTS modem/Windows computer that can't connect properly to the internet. It gets an active PDP context and Windows gets an IP address from DHCP, DNS and default gateway addresses. But no ...
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0answers
5k views

How are IPs assigned on 3g networks?

I am a mobile apps developer who has run into some strange and interesting problems with 3G connections. We develop applications using both the Twitter API and Twitter Streaming API. The normal ...
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1answer
10k views

Ethernet connection shows unidentified network with no internet access

For years I've used a physical Ethernet connection for my internet access, then a few days ago it went down and said it was an unidentified network with no internet access. I dug out a wifi card and ...
3
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1answer
200 views

A Canadian in Berlin - problems with FTP and IP numbers - anyone have ideas?

Thanks for taking the time. My problem- I am a Canadian (with Canadian laptop) presently in Berlin. For some reason I am having repeated connectivity problems -- At my flat I cannot connect via ...
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0answers
285 views

How to connect to a torrent tracker running on a local host?

I want to share huge files via bitTorrent. I'm using Ubuntu 18.04. I've set up a tracker opentracker listening to port 6969, and a client kTorrent listening to port 6881. My network uses NAT. I ...
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0answers
985 views

ZTE H168N in Bridge Mode: Passing ISP IP to secondary AVM Fritz Box

I have a ZTE H168N device set up as a PTM bridge, providing VDSL2 to my Fritz Box (3390). It works fine, however, my Fritz Box' "ISP IP" is e.g. 100.101.159.155, which I know is not routed and which ...
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46 views

How to detect connections to specific IP addresses from home network

(The real title is "how to detect when my son is playing League of Legends".) My home network consists of an RT-AC66U router with the usual wireless network and a few wired connections to Linux boxes....
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1answer
46 views

Switch between LANs - dynamic internal IPs of Linux guest; how to connect with hostname?

I sometimes bring my computer to home to work; and every time I do this, I have to check the IP of my VMware CentOS box's IP because I connect with Putty. The work LAN use 10.160.xx.xx IP range and ...
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0answers
488 views

Connect to device over ethernet port

I am trying to to connect to a Hardware Debugger. It's method of connection is an Ethernet port. It has two states, one where you can connect to it using a hostname if it is on a network that supports ...
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0answers
280 views

Ip payload compression with xfrm

I'm trying to compress ip payload with ip xfrm between 2 computers. Computer 1 has the ip address 192.168.0.1 and computer 2 has 192.168.0.2. I successfully established a IPSec link between the 2 ...
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0answers
46 views

Changing IP address of one network changes another network's IP also

Problem: I have two virtual networks on my VM and changing the IP on one using Network dialog also updates the other IP. Background: I set the IP of VMnet1 (host only) to IP 192.168.241.4 I set up ...
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0answers
112 views

Losing internet after IP switches from valid public IP to a private IP, what could be wrong?

Basically I have had to call my ISP around 20 times in the last three weeks about this issue. My internet disconnects and my IP changes from a public IP in a valid range for my ISP to something in the ...
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1answer
203 views

Windows - internet not working on specific IP

I have a weird problem with one workstation. It's a computer running Win10 Pro with a static IP configuration. The IP was set more than year ago and it was working fine. Until today, when it suddenly ...
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0answers
2k views

PPP: Modem hangup on IPCP negotiation

First of all, sorry for the question if it is obvious, I'm not very good at network configuration. I'm currently trying to connect a Linux machine with Busybox through a modem to a cellular network (...
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1answer
1k views

Web Server won't load with Public IP outside the LAN

I recently set up a web server on my Raspberry Pi with a static IP of 192.168.0.28. I opened private and public port 80 through the router to this IP; it is a D-Link DIR-655 with the latest firmware ...
2
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1answer
6k views

How do I get pfsense WAN IP after I set it up on DHCP?

I just installed a FreeBSD 64-bit virtual machine with pfSense 2.3.2 with VMware Workstation 12, but with VMware Workstation 11 hardware compatibility. I booted and standard-installed pfSense and got ...
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0answers
1k views

ESP8266 SERVER PORT FORWARDING

Learning to implement a small server with the ESP8266 NODEMCU Amica board, it works and responds to a simple command by writing a string on my browser's screen. The server can be accessed from ...
2
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2answers
814 views

Want to know the local IP address assigned to me by my ISP

I use a TP-Link router (3420) to connect to my ISP. My local IP address is 192.168.0.22. The ISP uses DHCP and the router shows the range of it 10.19.xxx.xxx. Sites like whatismyip.com show the ...
2
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1answer
98 views

Setup DNS for my server which is using static IP that can be access from anywhere on the internet

I have setup a static IP from my internet provider so that any one on the internet can access content on my server. I want to setup domain's to redirect to my server and load web site from my server ...
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0answers
37 views

DNS zone files with more than one name pointing to the same IP

I have set up a local DNS and the forward zone file looks like this: $TTL 86400 @ IN SOA ns0.mylocal.loc. root.mylocal.loc. ( 2011071001 ;Serial 3600 ;Refresh 1800 ...
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1answer
145 views

Hopping Gateways in a Multi-gateway Network?

I'm on a network that has multiple gateways, and it seems that my machine connects to a different gateway than what my phone does. I'm curious as to how I may switch to another gateway. I've tried ...
2
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1answer
261 views

How can I make a call with/to multiple people on the same public IP?

I need to set up a Skype call in a net cafe. The problem is that every PC in the net cafe uses the same IP address and because of this, no more than two people can join the same call on Skype. (I ...
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0answers
56 views

Is there any reason not to use the external IP when accessing local resources?

Until recently I had always assumed that accessing the external IP address from within the LAN would go out to the internet and then back unless specially configured in the router. Apparently, if it ...
2
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0answers
131 views

How to get my router to forward IP address to web app?

My web server is behind a Microtik router v6.1. My web app is only able to see the router's IP when referencing "REMOTE_ADDR" or "HTTP_X_FORWARDED_FOR" (asp.net app). How do I enable "IP forwarding" (...
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0answers
1k views

*.org domain websites are not loading

The problem is that any page with *.org domain in not loading on my computer (Ubuntu 14.04). Any other domains like *.com, *.net are loading! This is very strange. I tried in different browsers, and ...
2
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1answer
2k views

Batch check if IP is within specific range

I'm trying to make a batch script to get local IP-address of active NIC (could be wireless or local). To get IP adress I have used following line: FOR /F "delims=[] tokens=2" %%a in ('ping -4 %...
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1answer
2k views

IPv6 Web Site, But Fails IPv6 Readiness Tests

This is driving me bonkers. I have a Windows Server 2012 R2 machine running IIS 8.5. IPv6 is working fine on this machine. All the IPv6 test sites I browse indicate this machine is indeed running ...
2
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1answer
2k views

Blocking Incoming IP With Win 7 Firewall

This question was asked before, but the answer is not working for me and the rules of this forum say do not respond to answers, so I am asking again. I went through the following process on the Win 7 ...
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0answers
543 views

How to mitigate IP fragmentation attacks before reassembly when authentication information is available?

I'm trying to filter incoming traffic to high bandwidth, low latency network, to mitigate DDOS. The incoming traffic is custom UDP (I'm setting the protocol specs so I can force IP headers if ...
2
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0answers
873 views

Add a VLAN for virtual machines to Tomato USB

I've got an ASUS RTAC66U with Tomato Shibby 1.28 v115 installed. I've got some VMs with which I'm trying to replicate a set of servers, down to IP address to debug some stuff. I've set the VMs to ...
2
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3answers
1k views

Is it possible to break IP address based network speed restriction?

My company restricted the network speed by IP as 200K. That mean my maximum download speed is 200K per second. However, since the restriction is IP based, I can install a virtual machine and set its ...
2
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2answers
28k views

Can't access my IP camera over the internet

EDIT: My problem is solved, please read comments 2-5 and 8,9. I have an EasyN F3 (F3-M166) IP camera. It works fine on local IP address, but I can't access it over internet. This is what I have done ...
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0answers
1k views

OS X : Use the same local ip Ethernet + Wifi

I currently have a Macbook connected to a Thunderbolt Ethernet adapter and as a backup it connects to the same network via wifi. I' using last years airport extreme as a router. I tend to do a lot of ...
2
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1answer
2k views

Blocking incoming connections from IP in windows XP

I have a request to block any incoming connections from a block of IP addresses but they would like to leave the outgoing traffic alone (no block). Is there a way to do this in Windows XP? The ...
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0answers
221 views

IP based tunneling using putty

under linux i learnt to establish an ip-based tunnel using ssh, doing this: # background tunnel ip based on tun5 sudo ssh -f -N -w 5:5 root@remoteserver # setup remote: tun5 ssh root@remoteserver "...
2
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1answer
2k views

Extract ip address from specific NIC in win7 batch file

I am building a batch to automatically switch a proxy config and the related ip settings bui i am having trouble extracting the ip address of the network adapter i need. I have one "real" nic, and two ...
2
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1answer
206 views

Reliable cross-platform way of determining hostname from IP address

Within the DHCP table of a router, clients that have sent their network name are listed with IP and MAC addresses. I need a way to get the host names that clients have sent. The router does not store ...
2
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1answer
3k views

Failed to connect to server: The requested address is a broadcast address, but the appropriate flag was not set

My server IP address starts with 128.xxx.xxx.xxx and my laptop gets its address as a DHCP and is of the for 10.254.xxx.xxx I configured the server to look for my laptop and when I start the server it ...
2
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1answer
144 views

Simple DNS or just redirection for few names

PC1 is connected via VPN to server1 (s1) s1 is connected to pc1 via VPN tunnel and to s2 vie ssh. There is transparent proxy and iptables rules that take traffic from VPN and push to ssh SOCKS5. s2 ...
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0answers
149 views

Routes with question marks in routing table

When I do ip route show table all I see some routes with question marks in them as below. multicast ???/32 from ???/32 table default proto none iif eth0 They appear to be multicast routes. I don't ...

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