IP - Internet Protocol, the most commonly-used set of rules for dispatching data across a large computer network.

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0answers
15 views

NIC cards in a LINUX server [migrated]

I have below doubts, Can someone clarify, please? Four interfaces(say eth1, eth2,eth3,eth4) are configured with different subnet IP addresses in my LINUX server, so does that mean are there four ...
1
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2answers
38 views

Block direct IP connections to Apache web server

I need to figure out how to block direct IP access to my website. Example: I want it so that when people type my IP address 1.2.3.4 into the browser it doesn't work, but when they type www.example....
0
votes
2answers
2k views

How to use pfSense as a firewall in order to assign url whitelists to IP groups

In a corporate network without DHCP, the temporary solution to whitelist a couple of useful sites is to change the hosts file under Windows/System32/drivers/etc/ but since modern sites tend to change ...
0
votes
1answer
18 views

AWS EC2: Secure configuration via IP access list

My company have a network with a fixed IP address/IP address range. Is it save when I configure my Security group that all traffic from this IP address will be accepted and everything else will be ...
-2
votes
0answers
9 views

Samba4 DC for VPN

I use an strato root server with Debian 8. Now I installed an l2tp/ipsec Vpn server, the interfaces name is ppp0. Now i want the new installed and provisioned samba4 DC to only be used over that ...
0
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0answers
21 views

Failed floating-ips on Devstack installation [on hold]

I am trying to install Devstack (from git master) on a single vagrant based ubuntu running on Virtualbox. Initially I have only a NAT adapter and running stach.sh as stack user using the following ...
0
votes
0answers
14 views

iptables / routing - need to direct packets through a particular interface with frequent disconnects and default gateway changes

First and foremost, I did read this question iptables - Target to route packet to specific interface? and did my best to google, but so far can't figure out the solution. Problem: A linux machine (...
1
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0answers
14 views

How can I find the docker-machine network adapter name for a docker container?

I would like to introduce network variability into docker containers. Specifically, I would like to be able to run commands such as: sudo tc qdisc add dev vethecb732a root netem delay 500ms 400ms ...
0
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0answers
14 views

Cannot create macvlan interface, why?

My linux (debian jessie, 4.6.0-0.bpo.1-amd64 #1 SMP Debian 4.6.1-1~bpo8+1 (2016-06-14)) boxes have a number of modems and mifis connected. I would like to split off some of the processes in the system ...
2
votes
1answer
1k views

How to block all incoming proxy visits except from one specific I.P?

I have a page that is prone to attacks, so, in order to reduce the anonymous attacks, I use this code in my .htaccess which I found online : # BLOCK PROXY VISITS <IfModule mod_rewrite.c> ...
-1
votes
2answers
38 views

Can't access to an website even if connected on same network [on hold]

I'm able to access a link from an IP Address but my co-worker can't even though we're connected on the same network ( Both LAN or Wi-Fi ) it's a professional environment so it might be a firewall ...
0
votes
2answers
82 views

How to get ILO IP address without a monitor?

I have a microserver gen8, that i just changed its location, now it's not connecting automatically to the internet. And to debug it i want to connect to ILO which is link up now but i don't remember ...
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votes
2answers
33 views

How can i set my new ip adress? [Debian / Ubuntu] [closed]

I have my own VPS at OVH and it comes with a default ip address in France. So for geolocation needs, i bought one for in the UK. Now i have Ubuntu server 16.40 running, and i want to set my newly ...
0
votes
1answer
16 views

ntpd appears to work with ipv6 servers, but not ipv4

So, we have an ntp server (ntp-4.2.8-r1) which uses this list of time servers: server pool.ntp.org server 24.56.178.140 server 2001:470:0:2c8::2 server ntp.markyate.net server ntpv6.dianacht.de ...
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0answers
14 views

Windows Server DHCP not working over 2.4 GHz Network

I have just realized that my Windows Server that is handing out DHCP addresses is not working over my 2.4 GHz network. I have tested both the Wired and 5 GHz networks in our building, but over the 2.4 ...
8
votes
3answers
7k views

Verify that a name server is registered at a TLD registry

Let's say I own the domain name example.tld. It is registered at registrar R. In my account at R, I registered the following name servers for the .TLD registry: ns1.example.tld --> 123.456.789.001 ...
0
votes
1answer
18 views

Lost access to IP restricted server

So we have a server that has IP restrictions set for SSH, cPanel..etc and our static IP has been recently changed before we could update the IP restrictions meaning we have lost access. The support ...
-4
votes
1answer
36 views

Why is X_FORWARDED_FOR preferred over REMOTE_ADDR when fetching the user's IP? [closed]

Since X_FORWARDED_FOR can be easily spoofed, I think the normal way to get the user IP is using REMOTE_ADDR. I have heard that in case of using the last one, you can't have access to IP of people ...
1
vote
1answer
2k views

Finding local IP addresses using Python's stdlib under Debian jessie

I am writing a distributed systems program in python, and in this program I need to know the local ip-address... eg. 168.192.... 10.13..... etc, not 127.0.0.1 or hostname. I have found following ...
6
votes
4answers
4k views

Openvpn, forward packets very slowly

I rebooted my server, and an odd issue just came out. I am running on ArchLinux, the clients are Ubuntu, Android and Mac. The problem is that accessing the internet via the clients is slow, about 2ko/...
0
votes
0answers
20 views

monitoring if the ip is down (not up)

Is there a monitoring service that can notify if the IP that is normally down becomes reachable? So, the reverse of the usual stuff. I just need to check a few IPs, so bringing up a complete ...
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votes
1answer
37 views

Pointing namecheap.com domain name to www.ovh.co.uk server

I have bought vps hosting plan-3 from ovh.com. My ip is 158.69.219.147 or server vps85119.vps.ovh.ca I have installed my site on ovh, but my real domain name is www.free-sample-loop.com(typo ...
0
votes
3answers
29 views

Have 2 different applications use 2 different ip's with the same port on the same host

I want to have an application running on x.x.x.x:80 and another one at y.y.y.y:80 on the same host. I have bought 2 ips from ovh and would like to know how to do so. I found these: Debian/OVH: How to ...
0
votes
2answers
95 views

Visitors from strange IP addresses

Almost every day I have new users on my website that come from strange IP addresses: 162.158.102.39 162.158.102.41 162.158.103.42 etc. Maxmind says these IP addresses belong to Poland, Cloudflare. ...
2
votes
2answers
1k views

How to make lxd containers accessible to the LAN

If I use Virtualbox to spin up a VM, I can select "bridged" as the network adapter type and this results in the guest/virtual NIC being connected to my physical LAN and hence getting a LAN IP from my ...
1
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3answers
69 views

Setting a static IP exactly as the dynamic IP yields loss of connection

Before I start I would like to point out that I do not want to get hung up on DNS issues with this question. EVEN IF DNS issues are apparent that would have nothing to do with basic IP traffic and ...
55
votes
8answers
50k views

What is “anycast” and how is it helpful?

I'd never heard of anycast until a few seconds ago when I read "What are some cool or useful server/networking tricks?". The wikipedia "Anycast" article on it is quite formal and doesn't really evoke ...
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votes
0answers
26 views

Blocking ssh to instances using Public IPs (AWS VPC)

I really couldn't find anything useful on the internet. I need to disable accessing the instances using public IPs in our VPC environment. For example, I don't want users ssh to our instances using ...
0
votes
1answer
14 views

List of auto-banned IPs in IIS?

I have configured the "FTP Logon Attempt Restrictions" feature in IIS, but nowhere can I find where restricted IPs are listed. There must be a list somewhere that IIS will uses at logon. So my ...
2
votes
3answers
3k views

DNS A record with dynamic ip

My hosting provider (amen.pt) told me I can keep my e-mails and webmail hosted with them and host the website elsewere. For this to work I need to change the DNS A record 'www' to the IP of the other ...
0
votes
0answers
15 views

OpenWrt - connecting WLAN and LAN at network level 3

I have a Linksys WRT54GL router with OpenWrt installed. I would like to create two independent networks, each with its own DHCP server: one WLAN and one regular LAN using the switch ports. My /etc/...
1
vote
2answers
2k views

SBS 2008 DNS issues in BPA

I'm gettng constant Critical Issue events in the Small Business Server Best Practices Analyser & resulting SBS Console reports that begin "The DNS client is not configured to point only to the ...
0
votes
1answer
16 views

Looking to mimic Netgear Nighthawk AC1900 Router Settings in a TP-Link MR3040 Router [closed]

I have a Netgear Nighthawk AC1900 Router that is setup and working correctly with a network that has two Wifi cameras and a Linux PC acting as a server. Static IP addresses have been assigned to both ...
0
votes
1answer
52 views

nginx deny ip - access forbidden by rule in error log

We having blocked some bad bots which relentlessly try to access our site via "Deny" directives in NGINX. It's not possible for us to block it at the firewall, as we use a load balancer that we have ...
0
votes
4answers
543 views

Is something wrong with DNS when the domain resolves but the IP address throws a 404?

When the domain resolves OK for a website, but the IP throws a 404 at the site, is this a DNS problem? Kind of complicated: I have a client with 3 domains. All three point to one hosting account. Two ...
0
votes
1answer
57 views

Windows Server 2012 DHCP not working sometimes

Currently on my network I have Windows Server 2012 setup with DNS, DHCP, and Squid Proxy. Most of the time when my clients connect to the network the DHCP server won't hand them an IP address, leaving ...
1
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2answers
95 views

Is it possible to use IPv6 in my local network if my ISP is using IPv4

My ISP is using IPv4 and assigns IP addresses via DHCP. Is it possible for me to use IPv6 in my local network/subnet, and if so is it even worth it to do so?
2
votes
2answers
2k views

Stop IIS 8.5 from listing on Port 80, but still listen on port 443 for specific IPs

A have an application server that serves a number of IIS 8.5 applications on a number of IP's. Some use port 80 only, some use port 443 only, some use 80 & 443. For the sites that use 443 only, ...
-1
votes
3answers
109 views

How to host multiple apps on one server and point multiple domains to them?

I am trying to figure things out and I am confused. I know some things but not enough. I know that domains actually point to the IP address of a server. So if I want to have two apps, they both have ...
0
votes
2answers
45 views

CentOS 6.7 vm static external IP setup issue

I have a new vm setup and have it setup like my CentOS 5.5 vm on OSX. It is a strange setup since we used Comcast Gateway as the router, and I really don't want to change that since we're using Mac, ...
2
votes
1answer
194 views

how to associate a Docker network interface to a Linux network interface (eth5) on Linux host?

My Linux host has 8 Ethernet interfaces, eth0 - eth7. I'm running three Docker 1.9 containers on this Linux host. How can I associate a network interface inside one Docker container to a specific ...
21
votes
9answers
99k views

Any way to find unused IP addresses on my network?

How can I locate unused IP addresses on my network? The DHCP server keeps assigning the same address and I need a different IP address to test my application with. The software would need to run on ...
20
votes
8answers
19k views

What is the network address (x.x.x.0) used for? [duplicate]

It appears to be common practice to not use the first address in a subnet, that is the IP 192.168.0.0/24, or a more exotic example would be 172.20.20.64/29. The ipcalc tool I frequently use follows ...
1
vote
1answer
44 views

Websocket reverse proxy with nginx: Error about request in server log, but works in browser

The situation I am running Etherpad, which is proxied via nginx. Etherpad uses Websockets with Socket.io. My nginx config is more or less this one. The location block for socket.io is this: rewrite ...
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votes
0answers
18 views

Mac is giving ipv6 to application. How to turn it off?

I am using question2answer for preparing setup locally. When I try to create admin user, I get the following error on UI. Database query error 1411 Incorrect string value: '::1' for function ...
1
vote
2answers
1k views

Draytek 2830, Multiple VLANS on Same Port

The Kit Ubiquiti Unifi Long Range Wireless Access Point Cisco SG200-08P Switch (VLAN, POE Support) Draytek 2830VN Router The Problem I need to enable Multiple VLANS against a single port on the ...
33
votes
6answers
13k views

Debugger for Iptables

I'm looking for an easy way to follow a packet through the iptables rules. This is not so much about logging, because I don't want to log all traffic (and I only want to have LOG targets for very few ...
1
vote
1answer
144 views

Dynamic IP address to Domain

A camera when connected to a DHCP Network receives an IP address. Using IP lookup I find the IP address of the camera. Then I type the camera IP address in a browser - it shows a website (index.html) ...
1
vote
0answers
22 views

IP address goes to subdomain instead of main domain [closed]

Note: The question may be linked to Ip address goes to lowest alphabetical domain on server, however.. something is happening that makes this different. Say I have 2 domains: domain1.com and domain2....
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votes
1answer
54 views

Setting up extra IP addresses [closed]

I have a dedicated server from OVH, recently bought 4 extra IP addresses (/30) and I'm very unsure about how to add them to my dedicated server, so I can use them. For example, my server's original ...