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

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6
votes
4answers
676 views

ran out of tcp udp ports [closed]

How to resolve a Windows or Linux system that runs out of the tcp/udp ports on a single server? I have over around 65000 tcp/udp ports being used on a single server as a result of SQL connections, ...
3
votes
1answer
114 views

Best practices for managing the IP addresses you own in DNS and their PTRs?

I was wondering how exactly the big companies go about managing all the IP addresses that their public servers use, especially in respect to setting up correct PTR-records. This is very important, ...
2
votes
1answer
178 views

Hyper-V external IP address

I am trying to apply an external IP address to my Virtual Host on CentOS, I have purchased a failover IP from my host and they have assigned me a Virtual MAC. I have created a static MAC on the ...
1
vote
1answer
87 views

Does a private MAC Address range exist?

I need a set of MAC/Ethernet addresses that I do not have to worry about collisions with, analogous to 192.168.x.x: addresses that will NEVER be assigned to real hardware.
-1
votes
1answer
143 views

How to get hostname for ip on a local network? [closed]

Disclaimer: not a sys admin/network expert so please bare with me. I'm trying to get the hostname for a given ip of a computer in a local network. The current test setup I have is a few single board ...
1
vote
2answers
81 views

Server IP is showing Firewall IP

From server 2008 r2, I check "what is my IP address", instead of showing my server IP, it showed my Firewall IP. How to rectify this.
-1
votes
1answer
27 views

Can't login to internet through browser [closed]

So for my home internet I can go into a browser and type in my IP and get access to network setting. Well I figured I would try this at my school and see if I got the same results. So I got the IP but ...
-3
votes
1answer
116 views

how to make server visible from internet [closed]

I have ADSL router with Static IP from my Internet provider. I know that, if I connect my server to router it can be visible from internet (working webserver etc.), but how does clients getting page ...
-1
votes
1answer
135 views

Default gateway and ARP confusion

I have the following configuration (I'd post a pic but not enough rep for more than 2): PC1 (10.0.2.10/24) and PC2 (10.0.2.137/29) are connected to a hub, which is connected to a router on interface ...
0
votes
1answer
63 views

How to tell squid use Source IP address for sending requests?

I have two interfaces in my ifconfig, eth0 and eth1. Squid is set to accept connections from both of them on port 3000. However, eth0's ip address is always used to send proxy requests, even if ...
1
vote
2answers
92 views

Ubuntu: Persisting IP Route Change on Reboot

The following command at the terminal gives me the networking changes I need: ip route change default via 10.255.255.1 dev eth0 src 82.82.82.82 To persist this on reboot I add the following to /etc/...
0
votes
1answer
43 views

Route HTTPS traffic to different virtual servers on single IP

I have Proxmox instance with single IP available. I have multiple virtual machines for different sites (domains). Each virtual server have it's own https certificates inside them. I need to find way ...
2
votes
1answer
26 views

why when i use tracert in powershell,it doesn't return complete reponse?

i use tracert in power shell,but it can not show all path,some parts talks Request timed out. Tracing route to google.com [216.58.212.78] over a maximum of 30 hops: 1 33 ms 33 ms 32 ms ...
0
votes
1answer
29 views

How do I properly configure KVM

I have a remote dedicated server on which I have installed KVM. When trying to create my first virtual machine I am unable to ssh to the machine. I assumed that I needed another ip address so I ...
1
vote
1answer
145 views

Assign more than one IP Address to the same MAC Address on Linux ISC-DHCP Server

I have the following question: One Linux DHCP server in pool mode, because of the step of fabrication, all the products have the same MAC Address that is changed at end of line, the boards use ...
0
votes
1answer
39 views

VPS Ubuntu connection timeout when I try connect via IP in browser

I have a problem with my VPS. It has installed Apache. When I trying to connect from specific network (home) I can easily access to it. When try on another one (for example 3G) it returns 110 - ...
-1
votes
1answer
60 views

Why when i use netstat while not connected to internet, it returns some ip addresses?

I read that this command displays network connections for the Transmission Control Protocol more info link netstat ,but when i not connected to internet and i turn off XAMMP server,it returns some ...
2
votes
1answer
162 views

Pinging Hostname results in reply from 2 different IP addresses

I have an odd behaviour on my Windows 2008 R2 server, when I ping a hostname of another system, my first reply has a different IP address then the following replies. For example, if I was to ping ...
0
votes
0answers
31 views

IP Address and Dom0 IP Address

What is the difference between normal IP address and Dom0 IP address? As far as I read so far, Dom0 IP is associated with VMs instances but I want to know if it there is a subtle difference here.
0
votes
1answer
101 views

How to let FreeBSD get IP address automatically in VMware?

I use FreeBSD 10.2 VM image in VMware workstation. Although I set bridge mode in VMware: I find the OS can't get an valid IP address: How can I let FreeBSD get IP address automatically in VM?
2
votes
2answers
332 views

Cannot ping remote server; how can I debug local networking misconfiguration vs my IP is blocked?

I manage a KVM VPS at 104.143.14.103 that for some reason cannot reach http://pecl.php.net. When I ping the IP address of the PECL server (104.236.228.160), to make sure that it isn't a DNS problem, ...
-1
votes
3answers
131 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
82 views

Why are subnet masks specified in full dot notation, rather than just a number?

Subnet masks for IPv4 (dunno about v6) are specified in full dot notation, e.g. 255.255.255.0. This means that the lower eight bits can be used to assign IP addresses to devices on a LAN (if I ...
0
votes
1answer
58 views

Multiple IP addresses

I am developing a number of mobile websites (using IIS), and I want to test them using my mobile device which is connected on the same LAN. I would like to access each website via a different local IP ...
0
votes
1answer
53 views

Most robust way of forwarding multiple URL via one IP

This is probably subjective but if anyone could suggest a robust solution for the following that would be fantastic. We have potentially multiple URL's in service which are currently 1:1 with Public ...
0
votes
2answers
87 views

Tunnelling through an IP alias

I have a server machine with a dedicated IP and several IP aliases. It has a single network interface and on it there are multiple IPs "attached". So let's say IP1 is the main ip but I also have IP2 ...
0
votes
0answers
15 views

What is the Red Hat equivalent of the windows “Register this connections Address in DNS”

Hi I have a collection of RHEL6 server each has 3 static IPS and interfaces Currently when we nslookup the hostname from another server it returns all 3 interfaces from the DNS server (windows) We ...
0
votes
1answer
122 views

Check if IP address is allowed through firewall

Our cloud service requires that the client's server allow specific IP addresses be whitelisted in their firewall. If the IPs aren't whitelisted, the end users will experience issues, but the end users ...
-2
votes
1answer
44 views

Point multiple ips to one server [closed]

I'm trying to setup a squid proxy on an ubuntu server. I happen to have multiple ip addresses that I bought along with the vps. Is it possible for me to setup the 2 extra ip addresses to point to my ...
-1
votes
0answers
46 views

What does it represent, when source IP and destination IP are same in Fortigate logs? [closed]

I am working on SIEM, while analyzing FORTIGATE logs I came across a scenario where source IP and destination IP is same. This is a local IP of network where destination port is 53 which represent DNS....
0
votes
1answer
80 views

Configure Azure IaaS VM to allow access by IP

I have an Azure IaaS Windows 2012R2 VM which is hosting a test website. The site is accessible externally by the hostname. What do I need to do to enable access to that same site by IP address? When ...
0
votes
2answers
77 views

How can I see IP addresses attempting to connect to my Amazon EC2?

I have an EC2 instance that is setup as an SFTP server using OpenSSH. It only allows connections on whitelisted IPs via TCP Port 22 (limited via an EC2 Security Group). I constantly have customers try ...
0
votes
0answers
45 views

Static route to access another IP/SUBNET from PC

Maybe it's a simple concept misunderstand. I'm in a network with ip 172.16.0.xxx (mask 255.255.240.0). How could I configure my PC (Windows 7) with a static route or any other kind of solution so I ...
0
votes
1answer
271 views

How to assign an IP for Hyper-V virtual machine using PowerShell?

I'm working with the Hyper-v and have created a VM using Vagrant. Seems to be in the Vagrantfile I've forgotten to define an IP address (static or dhcp use). Now I can view the info about the VM's ...
1
vote
2answers
226 views

How to whitelist an ip range blacklisted by Spamcop

Our testing team uses email addresses from a domain which is different from the actual site domain. For example, our site is www.abc.com and email addresses are belongs to user_x@xyz.com. www.abc.com ...
-3
votes
1answer
69 views

Retrieve old IP settings form Windows

This is pertaining to Windows in general (XP and all recent versions) After replacing an old motherboard with a new one, the NIC is different, has a new MAC address and generally needs a new TCP/IP ...
-1
votes
3answers
221 views

How to assign multiple public ip addresses

I have a server (Ubuntu 14.04) and want to assign these multiple public ip addresses. Expected: I want to ping all IP-Addresses from XXX.XXX.XXX.128 to XXX.XXX.XXX.143 Current Setup: IP-...
-2
votes
2answers
54 views

How could I share a dedicated IP amongst multiple servers?

I'm trying to split up a big server for a few people. They aren't going to run a website on it or anything like that but they want to at least connect to the server remotely. My hosting provider is ...
1
vote
1answer
87 views

Routed traffic away from VPN has no internet (Fedora)

I'm very new to linux routing and such as a preface. I have a plex server set up on Fedora 22. I've recently started using a VPN service connected via OpenVPN. Everything works great via VPN on my ...
0
votes
2answers
75 views

block ip with iptables ubuntu server

I am trying to block one IP with iptables in my Ubuntu server 12.04. The foreign IP is 117.16.18.95.dyna. You can take a look at the next image: I have added this ip to iptables with the next ...
-2
votes
1answer
39 views

SMTP Server with dynamic / Static IP

I have 3 servers and 3 IP's. Server 1 - Static IP - 111.111.111.111 Server 2 - Static IP - 222.222.222.222 Server 3 - Dynamic IP - 333.333.333.333 Now Server 3 is always assigned the IP 333.333.333....
1
vote
1answer
108 views

How safe it is to assume whois ip network /24 belogns to same hosting company?

I found this, but I don't think it answears my question: Is it safe to assume that two hosts on the same /24 network belong to the same AS-number? I have online shop, on which somone is spamming ...
0
votes
1answer
68 views

how to reach a host on a different subnet

I am new to networking and I am trying to work through a problem however I have become a bit stuck. I have a network with a subnet mask of 255.255.255.128, I have connected the routers for each of ...
1
vote
2answers
90 views

Command-line utility to test fwmark in ip rule / ip route?

I am trying to find a tool that will allow me to find the route a packet will take that comes in on a device, and has a particular destination address. ip route get will do most of what I am looking ...
0
votes
0answers
11 views

CentOS Drupal Site/Domain Sending UDP Attacks on Different IPs [duplicate]

My Drupal 7 site is hosted on a Cent-OS 6.5 VM. The hosting service provider notified me about an malicious activity on site and site is sending UDP packets on different IPs. Following is data ...
0
votes
2answers
116 views

Matching an IP address to a hostname when both are available but cannot be resolved

I am an administrator on a server that accepts RDP connections. When the client connects I know the client's computer name. Using netstat I can determine which connections have been established for ...
0
votes
1answer
85 views

Dual interface/network with duplicate IP (local and extern)

So, i have two virtual network, a machine with two interfaces, each on a different virtual network (but with the same logical network 192.168.0.0/24 both). eth1 : 192.168.0.10 eth2 : 192.168.0.20 I ...
2
votes
1answer
218 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 ...
0
votes
2answers
45 views

Implement an IP on Debian to redirect & failover on 2 external IPs

Hello network & sys gurus, I would like to use one Debian server inside a cluster to host a IP 1 redirecting to IP 2, or if IP 2 is not reachable, redirecting to IP 3. IP 2 and IP 3 are hosted ...
0
votes
1answer
16 views

Does LXC support IPSET6+?

I would like to use a new firewall-extension for PLESK on a Proxmox-LXC. Now the support of the firewall-extension wrote me this message: Does LXC support ipset 6+? If not then I wouldn't ...