0
votes
0answers
7 views

Cisco ASA5505 Public IP Address

I am trying to configure a Cisco ASA5505. I am using the GUI start up wizard. When I assign the outside IP address to be a public IP address the configuration will work but after about 30 seconds the ...
-2
votes
1answer
56 views

One Public IP, Private IPs, DNS Server and Multiple Servers [closed]

I have lots of unanswered questions about these topics. So, lets begin. First off all, I'm not a server and networking guru. I'm a regular PHP developer. And I've read allmost all of the articles ...
0
votes
2answers
28 views

Does it seem from NAT when they really come through a proxy?

Just question. When a client really come through a proxy, can we tell it from being through NAT?
0
votes
0answers
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 ...
-5
votes
1answer
147 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 ...
1
vote
1answer
51 views

Lost as to what I'm not doing in setting up a home lan network [closed]

I'm a PC repair tech and this is a problem I've recently been trying to troubleshoot for a customer. Upstairs they have the main router which servers as the gateway and router, both hardwired and ...
0
votes
0answers
104 views

Why is an ack response being sent to the wrong gateway?

I was trying to determine why a packet forwarded by iptables to my internal lan is returned on the wrong gateway. Having investigated this further, I determined that, at least in the case of one of ...
0
votes
0answers
55 views

Where can I find the range of IP addresses of my container OpenVZ

I'm looking for the "range of IP addresses of my container"... Where can I find those ? /etc/network/interfaces ? ifconfig ? I don't know and I can't find any answers... I need it for this tutorial ...
1
vote
2answers
334 views

Web server behind NAT, how to listen for public IP address

I have a debian web server (nginx) running behind a firewall using NAT. The web server is hosting several sites that require SSL and their own IP address. I'd like to have the SSL sites listen to only ...
2
votes
2answers
66 views

Cisco Network Object NAT to get Internet?

So I've inherited a Cisco ASA 5505, and I have no experience whatsoever with the things! There are two Network Interfaces both WAN facing, and the LAN interface of course. Now in NAT rules, there are ...
1
vote
1answer
254 views

Setting up IP masquerading by passing packets through external nodes

I'm trying to find a solution to prevent remote machines determining the source IP of my webserver. This is to hide the webserver's actual IP, helping avoid DDoS attacks. Incoming requests are ...
0
votes
1answer
606 views

Port forwarding behaves differently from virtual server in D-Link router?

There are two pages in D-Link router to setup access to internal network from outside: Port Forwarding and Virtual Server. Both allows to map external port to internal one, except latter page also ...
0
votes
1answer
276 views

Assign multiple IP addresses in NAT mode to the same VM

I'm aware that VirtualBox assigns the same IP to different VMs (by default 10.0.2.15), however I have a case where I have a VM with a single vNIC, and a Linux namespace inside the VM attempts to get ...
1
vote
1answer
228 views

NAT and ISP Subnet when load balancing on pfsense?

I have a pfsense box that I'm trying to plan the configuration for. I am going to be load balancing two ISP's, each with their own /29 static IP subnet. The question I have is in relation to the way ...
0
votes
2answers
128 views

NAT (network address translator) and mapping IP/port pair [closed]

I'm not sure if the NAT can mapping a unique external IP / port to multiple internal IP / port pairs. Is that possible?
1
vote
0answers
250 views

iptables dynamic NAT, SNAT: force overload on exhaustion

Is there a way to specify the use of iptables NAT'ing where you can use SNAT for a pool of outside addresses, but when the last IP is about to be used it is used as an overloaded outside IP? I ...
0
votes
2answers
109 views

NAT to a fixed IP via load balancer? [duplicate]

Possible Duplicate: Network Redundancy Example I got a network configuration as shown in the diagram. Thing is I want do some settings so that the public can access to the server from ...
1
vote
1answer
64 views

Does IOS 12.4 Basic have the “ip nat pool …” available

Could someone with Cisco IOS 12.4 Basic check to see if the command "ip nat pool" is available? We have 12.2 basic and I know it is in the 12.4 advanced version but our budget is very limited so I am ...
0
votes
1answer
126 views

networking: NAT protocol between two addresses of one network card

Is it possible to deploy NAT protocol between two addresses, one ip network card (so that between them there was no conflict)? This is to ensure that one ip address to the Internet through a proxy ...
0
votes
2answers
845 views

Linux as a gateway (no NAT)

I'm trying to configure a linux server as a gateway/router, but I can't get it to work, and all information I've managed to find is NAT-related. I have a public IP block for the gateway and devices ...
0
votes
1answer
106 views

Linux NAT server with two uplinks

In linux FC9, setting eth0 has default, ping -I eth1 IP address is working fine. In FC14 tehe same does not work. The above check is done to test the connectivity from that interface so that if the ...
0
votes
1answer
316 views

Vyatta internet connection + hosted site on same IP

Having a small issue setting up a vyatta. The company internet and two different websites are both on the same IP. Server 1 - Has websites hosted on ports 1000 and 3000 and also has a proxy server ...
0
votes
1answer
182 views

Spoofing Packets?

I host a GameServer and some stupid guy just keeps attacking my Application server with random queries. I have found a solution to block it but he uses different kinds of queries so I have to block ...
1
vote
3answers
5k views

How Do I Block an IP Address on ubuntu?

I have configured Ubuntu machine as router. Steps of NAT configuration are given below: #iptables -F #iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE #iptables-save ...
1
vote
1answer
1k views

Adding multiple A records for same host for backup purpose

I have a webserver. I have 2 static IP's from 2 different ISP's. I want to make sure my webserver is accessible when one ISP's network(s) are down. for example my host name a.example.com my ISP1 IP ...
-2
votes
1answer
53 views

Accessing a machine with a non-static IP from outside the network [closed]

I have a machine listening for ssh connections within a university network. The way that they've configured the network is such that each building is assigned a single external IP. I have no ability ...
1
vote
3answers
9k views

How to access internal server using public ip supplied by isp?

i am really new to network as i dont major in it. but i have been assigned this task and i cant get much of a reference form my colleagues as they also didnt handle this previously. let me describe ...
0
votes
2answers
2k views

In NAT mode VirtualBox DHCP only has one IP to assign?

When I set up two machines in VirtualBox via NAT mode each machine gets the same IP from the virtual DHCP server, why is that?? Makes no sense to me. Both have the Gateway 10.0.2.2 which is fine, but ...
28
votes
7answers
12k views

How many computers can have the same public IP?

I've got a list of hundreds of page requests from the same IP and I need to know if these could be requests by different computers.
1
vote
1answer
2k views

Cisco Pix how to add an additional block of static ip addresses for nat?

I have a pix 501 with 5 static ip addresses. My isp just gave me 5 more. I am trying to figure out how to add the new block and then how to nat/open at least one of them to an inside machine. So ...
1
vote
3answers
84 views

Suggestions on routers that would meet my requirements?

From my ISP I am getting one RJ45 Port from the Modem. One IP adress is advertised by DHCP, but beside that I have an IP range I need to use for servers. On the primary IP adress that is advertised ...
2
votes
1answer
495 views

Static routes for making hosts on different network accessible

I have a ubuntu router machine with following network settings: br0 192.168.1.15 netmask 255.255.255.0 br0:1 192.168.2.209 netmask 255.255.255.248 I have a pc attached to the br0:1 network with ...
1
vote
2answers
105 views

Expose resources behind a NAT

I have a very large storage pool located on a server behind a NAT. Given that ipv6 is not possible in my case, what options do I have left to reach this pool? If I rent a VPS with a public ip, could ...
2
votes
2answers
701 views

Public IP behind NAT firewall

I have a Linux NAT Firewall serving a virtual machine infrastructure. Right now all the VMs use NAT, but I'd like to have some of them to use a public IP that is not NATed. I have a range of IPs: ...
1
vote
2answers
3k views

How can I setup a Firewall without NAT?

We have 16 IP addresses from our ISP, and are setting up a SonicWall Firewall. I'd like to have the SonicWall do NAT for the LAN, but act as a firewall only (no NAT) for the servers which are using ...
1
vote
3answers
229 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
5answers
344 views

Help me understand Public/Private IP space and NAT

I just started working at a small-medium sized business after graduating school. So much of my knowledge is high level concepts without a lot of hands on. My understanding that according to rfc1918 ...
1
vote
2answers
571 views

Allow two servers to share an IP without using NAT in front?

We have outgrown the use of a single server for monitoring our network so we are looking to add another monitoring server. Unfortunately, we were shortsighted when we initially configured the hosts ...
0
votes
2answers
638 views

mixed private ip address and public ip address without nat?

I distribute network using vlan, at vlan.1 we already use a public ip, and to extend the services at vlan.11 we using private ip address. The machine in vlan.1 can ping device in vlan.11 ...
1
vote
1answer
644 views

A jail that is accessible from network without port forwarding

I am using FreeBSD 7.1 and on my server I have two different jails. One for database and second one for game server. What I need to know is if it is possible to assign game server's jail to public IP ...
0
votes
1answer
1k views

Internal and External IP Addresses with an SSL Certificate

I'm setting up a web server that has an internal IP address and an external IP address. e.g. Browsers on the network request mysite.example.com and get 192.168.200 Browsers outside the network ...