My poblem: At work I have a proxy with some closed ports. I need to connect to an Oracle DB on some DB_IP at port 1521. DB_IP is a public IP. What I Have: At home, I have a Linux machine and a Linksys WRT54G Router. What I need: How can I do to communicate a PC at work with DB_IP:1521?
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I have had a look at the the information on the ubuntu forum about this but am having trouble getting the server to do what i want it to do.
I have a VPS running ubuntu 9.10 and i am trying to set it up to redirect port 25 to a remote machine via a VPN connection (remote machine connected via VPN)
i have tried setting this up in the firewall using webmin but it is not working.
i have a problem........ How to redirect local http port to remote ip ddress(192.168.10.64) using iptables..my destro is Centos 5.3 my rule is this iptables -t nat -A PREROUTING -s 0/0 -d <my local ip> -p tcp --dport 80 -j DNAT --to-destination 192.168.10.64
View 1 Replies View RelatedI want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
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I am looking to set up a system that will bring in an e-mail on a port like 4082 then sent it out to a standard e-mail port. this is a fire wall issue. I am looking for the best software I can use on an Ubuntu-Desktop platform to accomplish this and an idea on how to set this up?
View 6 Replies View RelatedCurrently my home internet provider does not allow services on ports 1 to 1024 but allow the use of high ports to whatever users want to do and I was wondering what ways are there to mask my webserver @ ip:8080 and yet maintain the servernames ? For example currently if I use myexample.com:8080 it will open just fine but I know there some ways to make it look like if port 8080 never existed, one example of this would be using a proxy server somewhere else to redirect the access but I don't have one available nor money to use for this.
In the above case what would happen is that when user hitted the proxy server it would redirect and query my server so user would never know 2nd server existed at all. Another way would be creating a page somewhere else and put your site as a iframe or frame which would hide it but may be a problem to some browsers etc...
So I belive the question here is what options do I have to mask my server at 8080 to look like a transparent webserver? While I do know this seems a bit technical I belive the place to ask this question would be here instead of serverfault
*Am trying to configure on machine ?MyServer.net? apache on port 8586. *Two applications run on same machine on different ports Jenkins on 8081 and Hudson on 8080.*Request coming to 8586 port should redirect to either 8080 or 8081 on one condition. *The request from client machine coming to MyServernet:8586 looks something like this ?MyServer.net/job/<JOBNAME>/build?token=TOKEN?.
Condition
If <JOBNAME> is ?naveen? apache should redirect to 8081.
If <JOBNAME> is not ?naveenn? apache should redirect to 8080.
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I successfully installed the virtual box on my fedora 8 system, and also created a virtual machine with windows xp OS, it works nicely, I try to configure the serial port of my virtual machine and try to configure the path for the port "screen shot are attached" it gives me the error message also the "screen shot are attached" for your review.Is kind of mistake is going on during the path setting, and how to set the path for configuring the serial port of my virtual machine so that I can use the hyper terminal tool of windows.
View 4 Replies View RelatedI have set up an openvpn server on ubuntu via port tcp 443. The server use a public network and almost every ports are blocked (not 443) So when a client connect to the server, if it send traffic needing a blocked port, the connection cannot been etablished of course. So i d like to know if it is possible to redirect all incoming traffic on the server to an other unblocked port (like 443) to bypass firewall.
I dont think openvpn offer this possibility but maybe with linux it is possible..
I need redirect serial port from ONE computer to ANOTHER computer, and at the another send this port to VirtualBox with WindowsXP.VB needed because i need to use software for windoze I do this:NE computer:socat tcp-l:54321,reuseaddr,fork file:/dev/ttyS0,nonblock,waitlock=/var/run/tty0.lock
ANOTHER computer:
socat pty,link=/tmp/ttyS0,waitslave tcp:ONE:54321
Now (at ANOTHER) i've set serial port in VirtualBox as
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I have "Server A" with real internet ip 1.2.3.4 (eth0) and lan ip 192.168.1.1 (eth1) There's also "Server B" with lan ip 192.168.1.2 (eth0), I'm running an Apache Web server on "Server B", so I want to redirect all traffic from IP 1.2.3.4 port 80 (Server A) to 192.168.1.2 port 80 (Server B), using the following rule:
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iptables -t nat -A PREROUTING -p tcp -d 1.2.3.4 --dport 80 -j DNAT --to 192.168.1.2:80 This actually works pretty good, from internet I can browse ttp://1.2.3.4 But the problem is that if I check the Apache logs, all incoming connections seems to come from 192.168.1.1 instead of showing the real source ip addresses (internet ip's) so this is screwing up all my web stats, I've been looking for hours and hours on how to make a transparent redirect, but can't find any info, I know there must be a way because my old WRT54G router which uses iptables could do it.
How Do I enable a port 843 in a Linux machine . I have written a server program that listens to port 843 and responds when requested . But Client socket request is not able to reach that port . socket.connect functions returns -1 with timeout. I have edited /etc/services to add that port . But this is not working .
View 6 Replies View RelatedHow can i redirect data received on a port to another port located in a different machine? Can i do this using IPTABLES ?
View 4 Replies View RelatedMy network isPC1 -- (NIC1,10.1.1.x) Linux (NIC2,10.1.2.x) -- Server 1 (HTTP/FTP)My question isIn the linux system, can I change the PC1 source port from 20000 to 30000? for examplePC1(sport:20000,dport:80)---Linux-- (sport:30000,dport:80)--- Server 1 (HTTP/FTP)
View 2 Replies View RelatedThis is where it starts: I have 2 networks. The first: 192.168.1.0/24 composed by the router which has access to the internet with the IP 192.168.1 and the server (who is a gateway) with the IP 192.168.1.42 The other network: 192.168.2.0/24 composed by the gateway with the IP 192.168.2.1 and the clients (on the 192.168.2.0/24 subnet). To sum up, the gateway has 2 IPs (192.168.1.4(eth0) and 192.168.2.1(eth1)). On this gateway, I have squid installed (and listening on port 3128). I also made a redirection to redirect some computers who want to access to the web (port 80) to squid (port 3128) with this command: /sbin/iptables -t nat -A PREROUTING -m mac --mac-source CLIENT_MAC -p tcp -m tcp --dport 80 -j REDIRECT --to-port 3128
At this stage, everything works fine. The clients can access the web by the proxy without "knowing". What I wanted to do, is redirect also the port 443 (HTTPS). Actually, when a client wants to access to, for example, [URL]. He cannot. So I would want to be able to redirect people (without passing by any proxy) directly to google. Like a NAT. But the problem is that I can't. The thing would be to, in the gateway, take all the packets with port 443 in destination and handle them to the router 192.168.1.1. Then, when the router sends the packet back, the gateway takes the packet and handles it to the client. I tried putting ip_forward to 1, but the problem is that all IPs and ALL PORTS are forwarded. And I just want port 443 to be forwarded.
* a router/gateway. The external interface have the public IP, an other the DMZ, a third the internal room* a DMZ with the web server* an internal network (internet public room)I redirect the http port 80 to the web server. You should see him there.But I can't see this web site from the internal room. From the public IP /URL I have some sort of non existent message (sorry forgot to copy it). If I call for the private IP, I get the home page (but not the CSS files)the gateway nat's the networks.What is the trick to see the web site from the internal network?
View 4 Replies View RelatedI have multiple jvm instance of tomcat application on a unix server and its running on different port.i would like to redirect the port and uri.How can i achieve this with the help of apache. i heard we can do it using mod_proxy.
[URL]
Currently when i access http://myapp.xx.com/offer i get 404 error.
one way to achieve this is to rename my exploded app name (offers-service-main) to offer. But i dont want to do that.anyway to achieve it.
This what i have done from my side.
1) installed apache 2.2 with mod_proxy
./configure --prefix=/usr/local/apache2.0
--enable-proxy
--enable-proxy-connect
--enable-proxy-http
2) Added the below config in apache
ProxyRequests Off
ProxyPreserveHost On
ProxyPass /offer http://myapp.xx.com:18120/offers-service-main
ProxyPassReverse /offer http://myapp.xx.com:18120/offers-service-main
But the above configuration dosent seems to be work. Let me know if i need to do anything on the tomcat side.
I have two machines, one used as client and the other as server. I want to check if the port 7080 on server reachable from the client machine.How can I do that? Using telnet?
View 12 Replies View RelatedI have a bit of a strange scenario. I have a machine with a fixed IP (192.168.0.108), running Linux. It has an external IP 99.99.99.8 via a 1:1 NAT on a Cisco ASA/router. Port 3389 (MS RDP) is open for 99.99.99.8. I want my Linux machine to listen on port 3389 and redirect all traffic to that port to a Windows machine (192.168.0.100). In this way, my Linux box is able to respond to requests on all ports, but port 99.99.99.8:3389 connects to Remote desktop on the Windows PC. I do not have access to the Cisco NAT config. I was able to get this setup to work by using an SSH tunnel.
I ran this command on the linux box:
ssh -L 3389:192.168.0.100:3389 ergosteur@192.168.0.108
Any ideas? Perhaps using iptables or something?
I have a website example.com, serving pages on port 80. I want the url example.com/redmine to be rewritten to port 3000, where my redmine server is running, without actually changing the URL. So the user typing in example.com/redmine/test would serve up example.com:3000/test, without the user actually connecting through the port. I know this can work through CPanel, but I don't know exactly how it was implemented. I'm looked at how mod_proxy, mod_proxy_html, and mod_rewrite,
View 4 Replies View RelatedI have to connect from my linux client laptop to SPARC machine by using roll-over cable and RJ45 interface on the server. On windows I always used Tera Term but don't know how to accomplish this task from linux laptop.
Is there some kind of app like TeraTerm on linux too ?
I have a server that is on a high port number, and people want it on port 80. For root exploit issues people say the server can not run as root. So to solve things I want to redirect port 80 to a high port number, say 12345 on the machine. This has been discussed all over the web, so I find I need to do this:
/sbin/iptables -t nat -A PREROUTING -p tcp -d 123.45.67.89 --dport 80 -j REDIRECT --to-ports 12345
/sbin/iptables-save > /etc/sysconfig/iptables
And I do this, an voila things work for the whole world. All machines in the world can see the server on port 80 on the machine.Except, on the machine itself. On the machine 123.45.67.89, I try to get to the server on 123.45.67.89:80, I get a can't connect error. On the machine if I try 123.45.67.89:12345 I can connect.What am I doing wrong here? I don't want localhost network really, I want the ip address and port, but I want the forwarding to work on the local machine. But it doesn't...
I am trying to show library content (asp files, IIS server, MySQL database on Windows Server 2003 - Inetpub/wwwroot/library - 192.168.0.3) publicly. But Apache webserver is on Linux machine. In one of previos topics I was adviced to mount this remote machine webfolder into Linux /var/www. Well this way it want work. I was adviced it can be done through redirecting.
View 14 Replies View RelatedHave done a bit of Googling around this but got totally swamped so will try here. Basically we are running a CentOS server which hosts a number of virtual hosts under Apache. Recently I needed to set up a development environment for another site using Ubuntu and have this running and accessible on the LAN from a VMWare image. I'm using bridged networking so the VMWare machine has its own IP on the LAN subnet.
I've set up a DNS to point to the external IP of the physical host but can't figure out how to route traffic requested on this domain to the VMWare host. I've basically tried two approaches (configuring a proxy web server and reverse proxy in an httpd.conf file and mucking around with iptables forwarding rules but without success.
Ideally I'd like somesite.somewhere.com to point to the VMWare IP but I could live with a custom port on the end if thats whats required.
To throw further complication into the mix I need reliable communication between the VMWare machine and external mail relay servers in order to debug any issues with mail bouncebacks, embargos etc.
Any idea what's the easiest way to accomplish this?
The issue is that my CentOS workstation is in a vlan from where the Intranet's DNS servers are unreachable. For browsing the web there is an ISA proxy server, which I presume resolves DNS for my firefox. However, wget, host, ping and aria2c fail to get any sort of DNS resolution since they're being run from command line.I have exported HTTP_PROXY value, which provides me internet access on console, but,only when I connect using IP address. It fails on name resolution.
My question is:May I redirect the DNS queries to my home PC which would be running a DNS server on a non standard port?I was thinking of putting nameserver 127.0.0.1 in /etc/resolv.conf and then put iptables rule to redirect 127.0.0.1:53 UDP to a.public.ip.address:3535 UDP..I don't know if I am shooting blanks or what, I am not very much aware of this kind of setup.My main need is to provide DNS resolution to console apps.I want to utilize my company's idle bandwidth for bulk downloads, so, using proxy, SSH tunneling through my Home PC is out of question.
I'm disgusted with myself for not knowing the answer to this one, as I consider myself a fairly low-level hackerly type, but: How do I disable the USB port on a machine? This is so that if a pendrive is stuck into it, nothing will happen, i.e. no viruses which can attack the machine etc. The guy I know who wants this has WINDOZE machines on which he wants this done, but anyway I plan to migrate his office to Linux, after which I'd be wanting the above functionality.
View 8 Replies View RelatedI am using squid proxy server in my Linux machine for caching. Now i want run my squid in transparent mode not set proxy settings in browsers.Like squid is running port 3128. If we redirect the port 80 packets to port 3128, looping is occurred.How to avoid looping?
View 5 Replies View RelatedI have a reverse ssh connection established from a remote machine to my local machine - it is established with autossh from the remote machine - I know it is connecting because I can see the two ssh processes on the local machine - and, when I kill the two ssh processes, two new ssh processes are immediately established. But I cannot login to the port on the local machine. I have tried everything - it simply refuses to connect. This remote machine is miles away and not readily accessible.
Code:
ssh -p 7766 -vvv user[at_sign]192.168.1.108
OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
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I'm wondering if there is some way I could utilize netcat or socat to "tap into" this connection from my local machine??? (My ultimate goal would be to get to a shell on the remote machine.)
I want to do port mapping on a linux machine using iptables.I have a service listeneing on port 2000 udp and I want to add iptables rule, which will map incoming packets on port 2001 to port 2000, so that service will accept the connections.The idea is that I don't want to change the default port for the service, but to make internal port redirection from (2001 to 2000), so the default service port will be filtered by iptables, and the other port will be open to the outside. The internet host connects to the linux machine on port 2001. The linux machine change destiation port from 2001 to 2000 and the service (on the same machine) process the packets and accepts the connection.I tried adding the following to my iptables rules, but it didn't work out:
$IPTABLES -A FORWARD -p udp --destination-port 2001 -j ACCEPT
$IPTABLES -t nat -A PREROUTING -i eth0 -p udp --dport 2001 -j REDIRECT --to-port 2000
I have cloned an embedded system that runs Opensuse 11 x86 using dd. The embedded system uses a simple serial device, by writing to the relevant device file (/dev/ttyS2, usually). Curiously, when I write to the same serial device on the newly cloned system (which, incidentally, has almost identical hardware), thusly:
echo hello > /dev/ttyS2 the command blocks for up to a minute, before finally returning without making the hardware do anything. I can boot into Opensuse's rescue system on the clone and successfully do exactly the same thing, as I can when I boot the original's "identical" operating system. Why might this problem occur? What can I do about it?
