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1answer
147 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) ...
0
votes
1answer
66 views

How to find out from which switch is coming the exact MAC address

I am working on a big company with 2 Backbone routers (ARS9K) and 200+ switches (Cisco, D-link, Tp-Link and etc.). Lets say that I know an exact MAC address of a device, but I do not know to which of ...
1
vote
1answer
1k views

POSTFIX: Sender address rejected: Domain not found (in reply to MAIL FROM command)

My mail server not recognize $mydestination, why? sproxy:/var/spool/mail # tail -f /var/log/mail | grep vinicius.lehmann Oct 6 11:13:21 sproxy amavis[31008]: (31008-17) Passed CLEAN {RelayedInternal}...
-2
votes
1answer
180 views

My Website Loads Really Slow Using Domain Name, But Fast Using IP

Only fixed line ISP is affected. Others OK. Anyone knows where to start to detect the problem?. DNS Checked using DIG TRACERT NSLOOKUP WHOIS all OK. is there anything i need to check at my hosting ...
2
votes
2answers
890 views

How to get public IPs on ESXi VMs?

We have a dedicated server with a hosting provider. We are running ESXi 6.0. The server has a single public IP which is currently being used for the management interface. The provider has also ...
1
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2answers
5k views

First and last IP address of the network 192.168.176.0/23 (subnet 23) [duplicate]

Let's have the following address of the network: 192.168.176.0/23. What are the first and last IP addresses of this network? Following this answer http://serverfault.com/a/327782/288201 I assume ...
0
votes
1answer
130 views

Is There a Way to Change the From Address in Exchange 2010 WITHOUT Using an Edge Transport?

I'm setting up some general emails for my company (info@company.com and the like), so we can print flyers and such and not worry about turnover. [I'm actually using mail-enabled Public Folders, ...
0
votes
1answer
734 views

How to disable temporary ipv6 address in win7?

I found that the ipv6 link local address was generated randomly in win7,not followed the eui-64 standard. Then I found this link and followed its guide. netsh interface ipv6 set global ...
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votes
1answer
30 views

What if you set your static IP to that of Google? [closed]

What prevents someone from setting their static IP to that of another server such as Google's servers? How is that prevented?
0
votes
1answer
40 views

Why is linux not listing the IP I want?

I have a linux based cluster (using openMosix). The machine intended to be used as a server has 2 network cards. Cluster is working, and all machines ping to each other inside the cluster (internal ...
2
votes
1answer
120 views

Postfix replaces “from” when using simple filtering

I'm trying to configure Postfix (on a RHEL 6.5) to modify the content of incoming messages and forward the emails to a remote server. I used a Perl script piped to Postfix to modify the content, and ...
1
vote
2answers
4k views

Why my website is not accessible with the www prefix

I know this is an old, and "amateur" question but I see myself in the need of making this question since I truly don't know whats going on. My website is not accessible with the www prefix... ...
1
vote
0answers
254 views

How to change SAS address on Expander

I have the following setup - two supermicro backplane attached to one controller LSI SAS 9207-4i4e and unfortunately cannot access the disks, during boot there are disks only in one backplane, the ...
-3
votes
2answers
1k views

Linux Find Mac of IP address that connects to server [closed]

On Linux , How Can Find Mac of IP addreass of any user / computer that connected to server ? we use Centos + Iptables .
-2
votes
2answers
5k views

What are the IPv6 Public and Private and Reserved ranges [duplicate]

I just want to know what are all the public IPv6 ranges which ISPs or other users can use? Also need a list of addresses which can be used in private networks and also the list of addresses which ...
0
votes
2answers
46 views

Session automatically resolving to secondary IP

I am using Debian 6 - 64-bit and this is what my /etc/network/interfaces file looks like auto eth0 iface eth0 inet static address PrimaryIP gateway X.X.X.X netmask 255.255.255.0 auto eth0:...
0
votes
5answers
304 views

Moved IP addresses to other server, no network internally anymore

I have had this server set-up: serverA ip 200.200.200.100 ip 200.200.200.101 ip 200.200.200.102 ip 200.200.200.103 Due to circumstances, I had to move away ip 200.200.200.102 and 200.200.200....
1
vote
1answer
265 views

How to block outgoing traffic of the mac address of one of the server's own NIC with ip tables?

i have a server with 5 nics connected to a switch, and running GNS3 (cisco router emulator). I need to block, in the server, the packets originated by the nics at layer 2 level (the nics are not ...
2
votes
1answer
75 views

How can I deny a bind lookup on a single IP address?

I am running a BIND installation as a simple RBL server. The problem I am running in to is that if I have listed a block of IP addresses like: *.0.0.10.rbl.mydomain.net. IN A 127.0....
0
votes
2answers
110 views

Assigning a static IP address to DHCP network

I would like to add a static IP address to computer on a DHCP network. If I reserve an IP address for this computer does this result in a static IP address?
1
vote
1answer
199 views

Add IP addresses on CentOS 6

I have a 12 IPv4 addresses that I need to add to a CentOS 6.3 machine however those 12 IPs are spread out among 3 different subnets. I know how to add additional IPs when they are on the same subnet, ...
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votes
3answers
1k views

MAC Address Changed?

I was wondering if the following MAC address is a valid one? 00:13:74:00:00:00 We have an automated network registration on the system whereby users can plug in their computers and register on the ...
-3
votes
2answers
129 views

Changing the IP address with a name [closed]

I have a web server (xampp) in a particular PC running on my LAN, and I added the following line in the 'hosts' file : 127.0.0.1 mysite. Then, in another PC connected to the LAN, I'm trying to ...
1
vote
1answer
790 views

Rebooting a guest causes IP address conflict

We've been having issues while setting up a vSphere cluster, using 7 ESXi hosts, and running about 74 guests that are amongst the mess. Our issue is that when we reboot a guest, Windows or Linux, ...
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votes
1answer
1k views

Multiple IP addresses in wireshark show the same mac address. What's going on?

I'm seeing an issue with a computer (running an embedded OS) transmitting over a network to an XP embedded machine. The computer has 10 physical ethernet ports, 9 of which are on this network. I ...
0
votes
2answers
516 views

Local Network Windows Port Address Translation

We have many legacy applications that can only send reports via printing. We have an application called RPM that can receive these print jobs and convert them to a more useful medium (e.g. PDF ...
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votes
2answers
596 views

Getting IP addresses through sniffing [closed]

Is it possible to know the gateway address of a wireless AP that I'm not connected to through sniffing? Airodump-ng can show MAC addresses of the AP and the clients associated but doesn't show IP ...
0
votes
2answers
49 views

Setting http://domain and http://ip to show different directories

Can someone tell me what httpd.conf settings I need to acomplish this? When in browser I access http://IP I want to show: /var/www/html/ And when I access http://domain I want to show /var/www/html/...
0
votes
1answer
374 views

How to enable DHCP address release with dhclient

We have a subnet with a couple of hundred virtual machines that: boot up do some short heavy computational task and shut down. The average life of a vm here is about 20 minutes. It's critical ...
0
votes
1answer
291 views

Postfix connection cache / address verification probes

Is Postfix connection cache also applicable for address verification probes? My setup of 2 frontends with 1 backend sometimes runs into trouble under high load. Frontends verify recipients on the ...
2
votes
3answers
8k views

IP address of virtual server?

I have a virtual server (shared hosting), with a domain name (and several sub-accounts, each one a separate site also with its own domain name) I was wondering if there was a way to find out the IP ...
3
votes
3answers
3k views

CentOS Wrong Outgoing IP Address

I have a Centos 5 box with a sub interface: ifconfig eth0 10.1.1.1 255.255.255.255 ifconfig eth0:1 10.1.1.2 255.255.255.255 The netmasks need to be 32bit in the environment this server is in. So ...
3
votes
2answers
1k views

Outbound IPv6 Trafic Fails

My hosting provider has supplied me with global static IPv6 for my machine. It appears that auto configuration has been successful and I can successfully ping my machine and tracepath6 appears to ...
3
votes
2answers
4k views

Allowing traffic only from a specified IP addresses using iptables

I have a dedicated server (which I only use a lab/testing environment). On the server CentOS 5.6 is running and it is functioning as a KVM host. To secure things a little I want to do the following ...
3
votes
5answers
2k views

Why is this China IP hitting my web site?

I have a web site that uses a couple hundred domain aliases, including franchise-dallas.info, franchise-delaware.info, and detroitfranchise.info (see more below). I have been getting ten to twenty ...
1
vote
1answer
526 views

configuring external block of IP addresses

I have a business DSL through FairPoint. With it, I have a block of 5 IP addresses. I've done some googling and spoken with FP tech support. Perhaps someone that's more knowledgeable than I can ...
0
votes
2answers
599 views

Postfix is sending mail with wrong domain

I've managed to setup a simple mail server that is working on every level but with one exception: when I'm sending email to an external email address, the receiver is seeing it as coming from blabla@...
1
vote
3answers
322 views

Display maintenance site to requesters based on their IP address

I would like to set a special configuration in our apache web server. I would like to display sites to the users according to their IP addresses. We plan to upgrade our web sites. During the upgrade ...
1
vote
1answer
708 views

Where does ISP obtain their IP address from in order to connect to internet?

To my little knowledge, my home computer can connect to internet because the ISP assigned a dynamic IP address to my router. Then through NAT, the router assign an dynamic IP address for my home ...
1
vote
3answers
245 views

Setting up IP addresses in Linux networking

I am running Ubuntu Desktop and Ubuntu Server editions on two separate VMs. For the desktop I have set network adapters: Adapter 1: internal network called intnet Adapter 2: NAT Server adapters: ...
0
votes
1answer
178 views

Forward Application IP/host to localhost (windows)

I'm working on a windows XP / win 7 environment and i have an application (game) that connects to an static hostname and ip. It does have a connection to 2 ports (ports 5000TCP&UDP and 6000TCP). ...
1
vote
4answers
887 views

Show Ubuntu server IP Addresses

I'm into a little dilemma here. I bought a server, running Ubuntu, having 255 IP addresses and now I need to see them. I've searched the internet before posting here and found out that the command "ip ...
1
vote
2answers
738 views

Mac address changed after windows automatic update?

My computer and that of a collegue have a changed their adress when booting up this morning. The only thing I can think of right now is the windows automatic update which has kicked in tonight to ...
3
votes
4answers
548 views

Linux: disallowing access to a network when the user has a static-defined IP address

In my network I run dhcpd3 set up to assign IP addresses only to specific MAC addresses. It works wonderfully, I even integrated it with bind9 to automatically create direct and reverse DNS hostnames ...
1
vote
2answers
1k views

SIP Server with dynamic public IP address and dyndns

Is it possible to run SIP server with dynamic public IP address and dyndns? The question is what happens when IP address is changed and DNS is not yet updated.
1
vote
2answers
277 views

IP Address Restriction

I need some technical help regarding IP address restriction in IIS7. My problem how i can block all IP's except following IP address ex:- 69.59.196.212 in my IIS7. I want give access max 4-5 IP's ...
0
votes
1answer
402 views

Using numerous IP addresses in a browser in linux

I own a dedicated server than runs Debian Linux. I have 64 IP addresses configured on the machine. I am looking to open a page (just has to access it with lynx or anything to read) with one of the non-...
2
votes
1answer
2k views

Address (url) forwarding with Vyatta

Got this kind of noob question i suppose. I got this very basic network setup and need help to set up some address forwarding. As seen in my illustration below all traffic enters via the eth0 ...
1
vote
2answers
3k views

Does CNAME (Canonical Name record) override A (address record)?

If I have an address record setup as follows... www.mywebsite.com 111.1.1.1 *.mywebsite.com 111.1.1.2 and a CNAME setup as follows... beta.mywebsite.com 111.1.1.3 Would pinging beta....
2
votes
2answers
2k views

Configuring Cisco ASA 5510 to assign static IP address based on MAC address

We have a CISCO ASA 5510 at work. We want to configure the same such that it can serve specific IP addresses based on the MAC address of the clients. Any help would be greatly appreciated. Thanks in ...