Networking :: Bind External IP Address To Internal IP Address?
Jun 7, 2009
I have a few external IP's assigned to me by my ISP. I have IPcop as my router/firewall. I am wondering how to bind 1 of my external ip's to my internal ip address. So I do not have to port forward, etc. For Example, 126.96.36.199 to 192.168.1.123 and on the server it see's the external IP address.
I dont know for what reason, since 2 days, I started having this message whenever I try to start httpd.I commented "Listen 443", restarted httpd started correctly. I needed to comment "listen 443" in order to be able to start httpdWhat is strange is when I do
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down. Unable to open logs
I am new to apache2 server i have been trying to start the server using the default httpd.conf file provided in the source code but when i give the following command sudo /usr/local/apache/bin/apachectl start i receive the above error and the server shuts down.
i have a xeon machine with ubuntu os machine specification is 3gb RAM 3 scsi hard drives each 73gb it have two ethernet cards one ethernet card is connected with adsl modem and the second is connected with LAN. now what is mikrotik doing for me is control access to bind mac adress with ip adress and control the band width for induvisual conection.
Now I'm not too clued up about networking and IP addresses. However, I know that I have an IP address for my router (which is dynamic) and then all of my machines have internal address e.g.
192.168.0.2 192.168.0.3 etc...
My server, had the internal address of 192.168.0.4 but now has changed to 192.168.0.7 what causes this to happen? I have to change my port forwarding on my router to allow access to my server from outside my network.
I am having difficulties in establishing a vpn connection using vpnc (or NetworkManaager-vpnc).
As long as the openswan IPsec daemon is running, vpnc-helper quits with the error message
Failed to bind to 0.0.0.0:500: Address already in use [user@computer ...]# vpnc-helper --local--port 0
If I use NetworkManager-vpnc, then establishing the connection simply fails. Using the --local-port 0 option does not change anything.
If I stop the ipsec service (service ipsec stop) then establishing the connectiong works, both with NetworkManager-vpnc and the console tool, but apparently the network traffic is not routed via the VPN - in my case this means that I cannot access hosts within the vpn and stuff.
Funny thing is - on my notebook from where I connect via WLAN, everything works fine. With Fedora 13 everything works fine, too.
Does anybody have an idea how to enforce that the vpn connection is actually used?
I have service runing on linux machine with external IP given by my ISP, but for privacy reasons i need to hide that IP (from RIPE, other WHOIS requests) by another IP before giving users to connect. Only one port. No big bandwith, only as much as possible low latency. Any ideas what to do or what to order?
Currently my OS is Ubuntu 9.04 Jaunty Jackalope Desktop OS and my web server is Apache2. I have a public address 60.x.y.z and my pc local address is 10.x.y.z. I have a web app in my Apache2 which currently run in localhost(10.x.y.z).
I would like to enable the web app so that it could be browse from outside. I know there maybe some port forwarding process and some commands involved in order to do that. But I have no idea on the steps to do that.
I am working on implementing a protocol on NS2.34 .I really need help to solve this problem . Actually , I don't now whether the problem is generated by the tcl code or the c++ code when I run the simulation, I get this result :
Code: num_nodes is set 64 INITIALIZE THE LIST xListHead 34 45 channel.cc:sendUp - Calc highestAntennaZ_ and distCST_ highestAntennaZ_ = 1.5, distCST_ = 550.0 SORTING LISTS ...DONE! code....
Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.
So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.
I'm running Ubuntu 10.10 and I'm having problems trying to assign it a static IP address. No matter what I put in the Preferences->Networking area (identifying the interface as Manual)... it still will query DHCP for an address if I run the dhclient command. I'm using to using ubuntu server where I just set the IP in the interfaces config file.
I am running my own Postfix mail server. Some time ago I noticed that most email was rejected because of the server's dynamic IP address. So I got a fixed IP address. However then I noticed that some mails got rejected due to failing the reverse DNS check. So my ISP told me to get a range of IP addresses and they could then create a PTR record for one of those addresses. That is now running but it turns out that the IP address used for the PTR record is a ... dynamic IP address. So Spamhaus PBL rejects my emails again.
I am configuring bind9 on fedora 9(sulphur).I have configured /etc/named.conf and created zone file in /var/named/I have started the service but when I am executing the command nslookup mydomain.com it is not able to resolve the name.Another problem I am facing when I do telnet localhost 53,I am able to connect.but when I do telnet myip 53 it does not connect.Seems to be a firewall problem but I ve disabled iptables selinux completely even I ve disabled dnsmasq but still not working.
I couldn't find an answer to this question (not including vpn) on different threads so decided to eventually post it, though it's probably easy one. I would like to connect to some application on known IP and port in the internet from my LAN computer. However to do so (I have some application, not any administrative constraints or not being allowed to) I would like to use local addresses. So, let's say - I want to connect to the external host VV.XX.YY.ZZ, port AA using 192.168.EE.FF port BB. Baically so far I have limitation in my application (too many places for possible error, to correct it right now - will change it in future). Is it possible that after my application sends request to 192.168.1.EE port BB, my Linux transparently translates it to VV.XX.YY.ZZ:AA? I tried iptables tutorials and some forums, but nothing seems to be addressing this issue. I don't know if it's event possible with iptables but am pretty sure this should be possible.
writing TCP server which is listening on port 6000. as soon as client closes the connection my server should Relisten on the same port I am getting address already in use error while binding for the second time, even if i am using SO_REUSEADDR..
I have a small cluster (OSCAR, Fedora 8) and I was able to run some application software on it. Then lightning struck very close to the building. Fortunately I had unplugged all the power cables (because the cluster has not yet been moved to where the power lines are protected), but it seems that the institution didn't have any protection on their LAN cables, and so the whole building's public network cards are damaged. A costly lesson.
Anyway, when I tried to run the application software in parallel across the cluster (using the private network which is unscathed) I get the error message given in the subject line. I contacted the application software's help department as I thought I had perhaps forgotten to set something, but according to them it is a normal network problem.
Check the /etc/hosts file and make sure that the nodes all have a single definition and you don't have lines like
127.0.0.1 localhost normnode3
and that normnode3 has the same address both on the master and on the node. try ping normnode3 from the master and see what address comes back 64 bytes from 188.8.131.52: icmp_seq=1 ttl=64 time=0.306 ms or is it 127.0.0.1. Then do the reverse. Also double check that you can ssh between nodes without password but I would expect a different error then. The command "hostname" returns gnlserv01, which is the public NIC.
After the lightning I had trouble getting the nodes to communicate "automatically" with each other, but it can be cured by starting the xinetd service and disabling the firewall on the master node (it's not too dangerous since I don't have a public interface at present and since I'm sitting behind the institution's firewall as well.) Just by the way, I would think that ther should be a file somewhere in which I could specify those two commands to take place when the master node is switched on. Could you perhaps enlighten me as to where and how I could specify it?
I was wondering whether I would need to explicitly start a bind-type service or something like that? (Since I had to explicitly start xinetd) I'm rather clueless really. I googled around and found that there is a named service, so I tried to start it, but I don't think it's installed on the computer. Therefore, since I have managed to run the application software in parallel previously, the named service is probably not the problem. Here is a copy of how my /etc/hosts file looks like:
# Do not remove the following line, or various programs # that require network functionality will fail. # These entries are managed by SIS, please don't modify them. 127.0.0.1 localhost.localdomain localhost
In my job I use some ethernet embedded devices. They take an ip address from dhcp server or auto ip. I only know mac address.How can I obtain ip from mac address? In other words I need a rarp packet generator.
I have two DNS servers, one local and one remote, and I am trying to get them to talk to each other using views.
The problem I'm having is that the remote server can talk to the local one and receive zone files, but if I update the local server internal view, the remote doesn't receive the update. Here is my config:
I'm using xubuntu 9.10. NOT ubuntu server. I need to install a lamp server on my box. I cannot install a new OS like ubuntu server, have to use what I got.when I run apache2, I get:
Quote:(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs I've changed the port that php listens too to 8080, 81, and I get the same message but with the new port number.
I've removed and installed apache three times, read all kind of threats on the web, but cannot find the solution! it's just driving crazy.
I have MySQL installed on my Kubuntu 10.04 desktop machine which I use for developing web applications.First, all worked fine. But then I wanted to synchronize the database with the MySQL database on my laptop, so I had to allow connections from the LAN interface. So I addedCode:bind-address =192.168.0.100to /etc/mysql/my.cnf. This worked and the synchronization was performed. I want to do this on a regular basis so I would like to keep that line in there.The problem now is that MySQL does not start on system boot. When I start up, mysql simply is not started. There are no errors in /var/log/mysql/mysql.err or /var/log/mysql.err; these files remain empty.When I try to start it using 'sudo start mysql' I get the same result. The 'start mysql' shows up in 'ps aux', but the mysql process itself does not.Now, I found out that when I run
Code: sudo -u mysql mysqld The mysqld daemon does start, and the server works fine. To make matters even more strange, if I kill this
I have vps box with debian. I have two ip addresses, but first (default) is currently unavailable. In that case there is many problem. Fortunately wget has --bind-address option so I can download. My question is how can i configure apt-get, aptitude to use specific address?
Ubuntu was a good choice for free server O/S. I am currently downloading it. My ISP wants to bind my static IP to a MAC address of the device that will be making my connection for me. Should my server be behind my router or in front of it? I kinda wanted it to be the access point and be able to monitor the usage from all the terminals in my house. We have 4 other PC's, a laptop and a PS3. My server is a Acer Altos G530 with 3.2 Xeon Processor, 4 gb of ECC DDR,
I need to publish my local webserver from my lan to access outside using internet, I have public ips provided by ISP my local webserver address is 192.168.1.5 and I want to bind this local address to a public ip (Ex: 184.108.40.206) to use it out side my lan through squid.