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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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?
View 1 Replies View RelatedI 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 RelatedI have recently installed fedora 14 and configured vpn to access my work network. I need to access some windows machines which although I can ping I cannot remote desktop into. When I go to Applications>Internet> Remote Desktop Viewer and put in the machine name (either just the machine name or the FQDN including the domain name) I get an error "Connection to <machinename> was closed".
View 4 Replies View RelatedI'm trying to connect with my server via telnet, but when i sent the command (telnet xxx.xxx.xxx.xxx Port) doesn't works and shows then follow error: Unable to connect to remote host: Connection refused, It happens with any port. Is strange but my telnet services works (telnet xxx.xxx.xxx.xxx), In addition, i tried with firewall enabled and disabled and the problem still happens. My centOS run on virtualbox.
View 3 Replies View RelatedThe 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.
Friday night I was working on some networking stuff between my two Fedora 14 boxes. I have my laptop and my desktop. on both machines I have "system-config-firewall 1.2.27" and "iptables" (i believe both come standard on F14?) I kept getting the same message as seen below before realizing perhaps I should check my firewall!
I added a rule for incoming and outgoing traffic on port 22 and was able to get in with no problems at all! however today I can't ssh into anything... I can't use "Remote Desktop Viewer 2.31.4" to vnc into the machine anymore. I can't remember the exact error message at this time, it's something close to "Connection was terminated" or "Unable to connect" I can update this message later.
last night I foolishly uninstalled the system-config-firewall and then uninstalled iptables to see if it was a simple firewall issue.... totally hosed my system <insert smiley!>
After reinstalling and realizing I didn't backup my documents <insert smiley!...again...> I started reinstalling all of my applications. I'm still unable to use ssh and I've tried to ssh my own computer.
Is this possible?
# ssh 127.0.0.1
ssh: connect to host 127.0.0.1 port 22: Connection refused
When I use the following command:
ssh user@ssh_server -L 5500:localhost:5500 -p 22
everything works fine. I can log in, and local port forwarding is done. Otherwise when I use the command:
ssh user@ssh_server -R 5500:localhost:5500 -p 22
I get an error "remote port forwarding failed for listen port 5500". However when I try remote port forwarding in WinXP by use of putty there is no problem...
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.
My 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 RelatedIs it possible to restrict telnet connection from remote to my server(linux -centos5)?
=================
Ex : [root@localhost]# telnet 10.0.0.33 80
Trying 10.0.0.33...
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I 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 am having trouble to make my SSH server working with remote machine.
Code:
telnet 192.168.1.102 22
PHP Code:
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How 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 RelatedI'd love a hint or two on the following problem. I've set up iptables rules to forward all connections to port 3306 to a non-standard mysql port on a remote server. This works, except that I need to deal with the loopback interface in a special way and I'm stuck.
Code:
iptables -t nat -A PREROUTING -p tcp --dport 3306 -j DNAT --to 128.XXX.XXX.XXX:3197
iptables -A FORWARD -p tcp -d 128.XXX.XXX.XXX --dport 3197 -j ACCEPT
iptables -t nat -A POSTROUTING -j MASQUERADE
Since locally-generated packets will never hit the PREROUTING rule, you'll need to setup a near identical rule using OUTPUT to make it work. Here is what I've tried:
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I need to redirect all http/https/ftp traffic through the remote proxy, but when I changes connection settings in browser or in System->Preferences->Network Proxy it doesn't work well: instead of getting page content browser asks for saving some short (8 bytes) file with the same content for all requested pages. It happens in Chrome/Opera/Firefox. This proxy requires authorization and works on computer with Windos XP. It worked well when I was using Windows 7 and Proxifier, now I have Ubuntu 9.10 with all available updates.
View 3 Replies View RelatedI'm trying to workaround a limitation in a server application. The limitation is that I can only connect to a LOCAL mysql database. I am trying to fool the server in to using a remote mysql database. I was hoping to do this by simply forwarding 3306 to another server on the same subnet.To that end I've set up iptables rules to forward all connections to port 3306 to a non-standard mysql port on a remote server. This works, except that I need to deal with the loopback interface in a special way and I'm stuck.
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?
i have an embbeded hardware that uses bootp for booting from a Network Managemnt Host (NMH)on the same ethernet. The embedded hardware has both kind of ports i.e ethernet as well as E1/T1. I would like ask, what do i require to establish a communication-link between the embedded hardware and the NMH throuh E1/T1 ports of embedded hardware, so as to make it boot through from E1/T1. Further, NMH possesses only ethernet port. Just to refine my questions i'd like to know what additions do i need to do on my NMH , like may be i have to put an E1/T1 port or is it possible that the E1/T1 port can be directly connected to an ethernet port on the other host.
pardon me if i am not making absolute sense here as my knowledge is limited on Layer 1 and layer 2.
I want to settup a proxy server who just redirect the internet connection to my second computer. I try Squid Proxy but its too complicated for me. Can you sugest me another more simple program to do what i want?
View 1 Replies View RelatedI am trying to have a serial device connect to my ubuntu machine via the com port, and forward that comport over the network to a windows box so that I can configure/access the device. I have looked into socat/ sredird but still haven't found an option that I can get to work.
View 1 Replies View RelatedI'm trying to implement remote NFS in our network
So I read a lot of posts on the Internet, but I don't understand which ports I have
to open/forward for this.
On some posts I see a lot of ports, I don't want to do this.
If this is the case, and I would set up NFS through an ssh tunnel, then do I only need the ssh port and does this mean it will always work if the server is reachable through ssh?
Or is this wishful thinking ?
I can ssh from my local machine (Ubuntu 10.4 64bit) to a remote Linux server. When I try to copy a file back to my machine (or just ssh to my machine) I get the following error - "port 22: No route to host".ifconfig on my local machine gives one ip address for "lo Link encap:Local Loopback" and one for "wlan0 Link encap:Ethernet"; I tried ssh both.I work on a laptop with a wireless router (which is also the modem)
View 6 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 am using debian testing on my office pc, but i need to access it's desktop from time to time. So i need No machine/teamviewer software that can provide me with possibility to interact my desktop. The problem is, that i want to run shadowed session type, because teamviewer is not good for me. So, when i run no machine in shadowed mode, it crashes with message "The connection with remote server was shut down, please check your network settings and try again." The log is here:
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I've recently installed OpenVPN on my dedicated server (Fedora) in order to have full internet access for all of my WinXP clients. In case somebody is interested in the details of the OpenVPN installation, I followed this documentation: Rootserver-as-OpenVPN-Gateway. The installation runs quire nicely, I'm able to surf the net and even file-sharing programs work on the XP clients - at least to some extent. There is a slight problem though: the file-sharing programs complain that they have a "NAT problem" or that they are "Firewalled".
Most likely, this problem can be addressed by configuring remote port forwarding (RPF) on the server. The only routing rules which I've added on the server during the OpenVPN installation are these:
Code:
# initialize natting for openvpn
iptables -t nat -F POSTROUTING
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -s 10.66.66.0/24 -j MASQUERADE
Let's assume a certain application on a client is listening on e.g. port 1234. How do I configure RPF for this port on the server side.
I 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 can use on the local machine the following command:
Code:
# cat /path/to/file >> /path/to/otherfile
but how it works to write from a local to the existing file from a remote machine?