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

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How to know if iptables rules work? [closed]

I'm implementing a IP Rotation for my SMTP Server using iptables, how would I know it work? This is the rule I use. iptables -t nat -I POSTROUTING -m state --state NEW -p tcp --dport 80 -o eth0 -m ...
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3answers
235 views

Change ssh port for specific ip address

I get the trouble with putty, so I prefer using shell( linux) to access server via ssh, my ip address has alter port for ssh is 6091, so is there anyway to access server via ssh by command ssh ...
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3answers
137 views

Get IP network range after reverse DNS?

For analytics purposes, I'm looking at large sets of IP addresses in server log files. I'm trying to perform reverse-DNS lookups to understand where traffic is coming from - e.g. what percentage of ...
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2answers
41 views

migrating site to new ip - some computers still see the old site

I have moved the site domain.com from ip.1.1.1 to ip.2.2.2. I have changed the A records in bind on the DNS. My local DNS is set to google's (8.8.8.8, 8.8.4.4), so for me, the issue was resolved in ...
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2answers
126 views

Force an LXC container to use its own IP address

Sorry if this question has already been asked. I could not find it, I have this setup : +---------------------------------------------------------------------------------------------+ |HOST ...
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0answers
47 views

All nework interfaces hang for seconds while one interface goes up/down

I am building a client/server application that uses several network interfaces in parallel for redundancy, and I have noticed that while one network interface goes down or goes up, the communication ...
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2answers
43 views

ip recognition is different

some months ago i bought a dedicated server from usa (http://www.dacentec.com/) datacenter. my ips are look like this : 162.248.243.blo blo blo when i check my ip in this site : ...
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1answer
55 views

Multi domain server with dedicated SSL's HA

I am hosting a server with 150 domain names (websites), each of the ssl's requere dedicated IP address. So server windows 2008, with 150 IP addressees and 150 websites. I need to have high ...
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33 views

Using NAT with iptables between corporate network and firewall'd corporate network

At work we have a firewall between two networks. I was told they opened up the two ports for me but I needed to modify the IPtables to allow packets to go through. I'm not familiar with the correct ...
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1answer
123 views

How to run a website domain without redirecting if IP is already used for another website? [duplicate]

I bought a VPS Host that gave me only 1 IP Address which I used on my first domain name and it works without any problems. Now my second domain name I can't use the same ip address as it points to ...
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0answers
114 views

ZNID24xx-Router public IP

I need to make my public IP the same as my internal one. My router is ZNID24xx-Router, and i'm trying to change the config of port forwarding, but i'm not certain this is the right thing to do and i ...
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2answers
55 views

DNS Server; Different Ports to different IP's [closed]

I have 2 servers with (of course :D) 2 IP's, for example: 123.456.789.101 & 101.987.654.321 Now I have a domain example.tld and want all requests go to 123.456.789.101, except the ones which hit ...
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0answers
50 views

heartbeat doesn't work on virtual interface

I try to use vertual interface as broadcast for heartbeat(bcast in ha.cf). When I try it I see this message in syslog: May 23 12:17:26 Ubuntu2 heartbeat: [1107]: ERROR: glib: Error setting socket ...
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1answer
38 views

IP Forward at router

Is there any way to set a router to simply redirect all traffic to another wan IP address? For example, I have a static wan ip of xx.xxx.xxx.123 and I want to forward all traffic to xx.xxx.xxx.124 ...
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3answers
85 views

What happen when I assign 2 IP on one NIC? [closed]

What happen when I assign 2 IP on one NIC? e.g. I have one physical NIC (eth0) and I assign on this interface 2 IPs from different network. e.g. auto eth0 iface eth0 inet static address ...
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0answers
33 views

Jetty and IIS on same server, different IPs

I have Windows Server 2012 R2, fresh install and I am running there IIS for .NET applications, now for many different reasons I want to run Jetty on a same server. IIS is setup to listen only on (for ...
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1answer
52 views

Why does IPTraf show multiple MAC addresses for my interfaces?

Hopefully a simple question with a simple answer. I thought each NIC had a single MAC address. However, as can be seen from the IPTraf output below, I have multiple MAC addresses for both my eth0 and ...
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5answers
470 views

Static ip using a router and DHCP [closed]

I have been trying to understand and achieve assigning a static IP address to my machine, while being connected to a router (WiFi) and using DHCP. My scenario is thus simple, but I think I missing ...
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1answer
37 views

i2b2 VM: Copy VM won't give me a valid IP address

After downloading a VM image and making a copy of it, I tried booting up both of them on the same Windows workstation using VMWare Player. I am unable to get an IP address for the second one in my ...
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6answers
140 views

How can I ssh to a firewalled server without a static IP?

I need to SSH into a client server that has an IP whitelist as part of access control. I don't have a static IP - sometimes I work from home, sometimes the library, sometimes a coffee shop, etc. How ...
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1answer
189 views

Using DHCP, is it possible to obtain an IP address & MAC address for a cluster? [closed]

I know that DHCP assigns IP addresses, but does it also assign a MAC address? Is this a commonly used paradigm for cluster/cloud computing? Perhaps DHCP could be used to dynamically assign a new IP ...
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1answer
142 views

Why Are There Only 65,535 Ports, and Will We Ever Have More? [closed]

I understand the original reasoning behind having 65,535 ports per IP address: this is the highest number that can be represented by a 16-bit, or 2-byte, number, and it wasn't conceivable that ...
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1answer
49 views

2 ips on 1 port vs 1 ip on 2 ports

Background I have a PHP-FPM sitting behind an Apache server. As I need to use two different configurations for PHP-FPM, I can configure it to be connected either on: 127.0.0.1:9000 and ...
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3answers
1k views

Block range of IP Addresses

I am getting bombarded with attempted hacks from China all with similar IPs. How would I block the IP range with something like 116.10.191.* etc. I am running Ubuntu Server 13.10. The current line ...
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1answer
741 views

can't access vSphere when rebooting vCenter Appliance

My root passw for vCenter Appliance has expired and I need to boot it from Linux Live-CD in order to recover it, now whenever I reboot the vCenter Appl. within the vSphere console, I loose connection ...
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78 views

localhost answering wrong ip

No idea how/why, but here's what I'm seeing. Consider 3 CentOS 5.10 boxes: Host A [10.1.2.7] Host B [10.1.2.8] Host C [10.1.2.9] All of a sudden we're getting strange behavior from Host X, ...
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2answers
51 views

Hosting server IP address doesn't match A record but still resolves, website loads ok?

Pretty confused by this, I have a website which is on a Fasthosts shared hosting package, the server IP is 213.171.xxx.x However when you do a DNS lookup the A record is a completely different IP ...
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1answer
29 views

find static defined device on network

I have a 'simple share nas' that I am unable to discover on my network. It will not show up on the client list of my router, but I believe it is statically set to an adress for the auto discover ...
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2answers
152 views

Port forwarding between 2 routers and wrong IP at the end

So here is the situation: I have adsl modem connected to 1st router "A" - local IP 192.168.2.1 I forward SSH port to 2nd router "B" - IP 192.168.1.1 On router "B" I forward SSH port to machine - ...
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1answer
131 views

Cannot access phpMyAdmin website with regular browsers, but with Tor

I'm having a weird problem: My os is MacOsX 10.8.5. What I try to do is to go to phpMyAdmin website and download the latest version. The problem is that the phpMyAdmin website won't load with ...
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1answer
694 views

ping works but ssh fails

machine1 IP: 172.30.11.119 machine2 IP: 172.30.11.120 machine3 IP: 172.30.11.121 machine4 IP: 172.30.11.122 Note: These machines are connected to LAN. I have configured the static ...
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1answer
27 views

Traffic on IP which is not being used?

My server (Debian 7.4, x86_64, Proxmox) has 4 IPs. One for the VM Host (call it A), and three that I use for virtual machines (say B, C and D). Currently, only B and C are used, the D address is not ...
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2answers
209 views

How do I redirect to different backend server based on URL using Apache?

I'm a newbie to Apache, sorry if this is a documented solution somewhere. I have been scouring the web and can't seem to find this answer ... I would like to redirect traffic based on the URL coming ...
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1answer
164 views

Get instance-id of EC2 instance via Java [closed]

I have an AWS EC2 instance deployed as a server, and I need to find out its public IP. Howver, to know that I must first know the instance-id of my instance. Objective: I have a Java code running ...
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3answers
72 views

Can you access an EC2 server from another AWS account?

If you have an EC2 server with a port open, then other EC2 servers can access it (using private IP). But, what if another AWS account hits that private IP, will they be able to access it?
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2answers
107 views

Any gotchas when using the lowest and highest IP addresses in a small block?

OVH offers additional public IPv4s in blocks as small as /30, that is 4 IPs total. As I understand it, strictly speaking two of those are supposed to be unusable. However, OVH allows me to route those ...
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1answer
72 views

Reading tracert output - what does this address mean?

7 7 ms 2 ms 3 ms 83.149.18.148 8 * 78 ms * ae52.edge7.Frankfurt1.Level3.net [195.16.162.53] 9 * * * Request timed out. 10 80 ms 80 ...
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2answers
145 views

RDP to machine on network with different subnet

Our broadband router has just been changed and our network which was on 172.18.2.xxx is now 192.168.9.xxx. All is fine but I have one box which we used to RDP into and which has no screen mouse or ...
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2answers
2k views

Can't access local web server using remote ip from within LAN

Since I've change my ISP, the current router (ADB P-RG A4202N) won't let me access my web server from within my local network using my remote IP or no-ip host - it redirects me to the router config ...
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0answers
56 views

Linux Loop two ethernet interfaces

-1 down vote favorite I would like build a topology like this one : [ eth1 <--> eth2 SAME PC] Where two interfaces ping each others without going through the local machine, as they were two ...
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1answer
53 views

Is there any affinity between IP subnets and DNS domains? [closed]

I understand what DNS and name servers do. But one question that I have is whether there are any technical, or convention oriented, relationships between DNS domains and IP address space. ...
2
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1answer
100 views

Assign different Hostname to different NIC

I have four network card on my server, I have assigned each with an specific IP now I want to set an different hostname for all the interface? What is the difference between setting the hostname in ...
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2answers
57 views

Restrict access to service to WiFi users

I would like to restrict access to a cloud service based on the network where the requests are coming from. I have control over both the network, and the cloud service receiving requests from within ...
1
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1answer
35 views

How do I send a different subdomain to a different IP, if two IPs are on the same VPS?

I have a VPS with three IPs. They're all on completely unrelated IPs (one is 23.226.xxx.x, another is 107.161.xx.xx, a third is 167.88.xxx.xx). If I go to beta.mydomain.com (for example, that won't ...
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83 views

Tracert of a spoofed IP results in Infinite Loop

Our firewall picked up a spoofed IP address that caught my attention. When I did a tracert to the spoofed IP address I get what I think is an odd response. Tracing route to 192.168.1.7 1 1 ms ...
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0answers
66 views

How often does the geolocation associated to an ordinary IP address usually change?

Can anyone tell me how often should i expect a routable IP address (either v4 or v6) to have its associated geolocation (country + city level) changed, in average? I'm asking this because i'm ...
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1answer
95 views

Bridging is breaking the server: KVM configuration

I'm pretty new to networking and just can't get my head around this. I'm trying to setup KVM-Qemu so I can run some virtual machines. The instructions I'm following are telling me to use eth0 and ...
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1answer
129 views

Show real TCP/IP addresses behind Nginx environment

When i execute the command netstat -atun | awk '{print $5}' | cut -d: -f1 | sed -e '/^$/d' |sort | uniq -c | sort -n I see high number of connection assigned to server ip I want to see the real ...
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1answer
172 views

One IP for whole LAN, provide access to local server outside the LAN [closed]

I have a LAN with multiple PCs and some servers. I would like to provide access to one of the servers from outside the LAN. The problem for me is I have one IP address for the whole LAN. The server is ...
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0answers
26 views

Jumphost VM not able to communicate with LAN

I have setup a jumphost VM on WinXP. It has 2 NICs. NIC1, which is the LAN, has the following IP settings: IP: 10.0.0.1 /24 (No default/ DNS configured) NIC2, which has external connections, has ...