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ISP VPS, routing traffic
Post 302909414 by solaris_user on Wednesday 16th of July 2014 06:16:39 PM
07-16-2014
Routing traffic from ISP datacenter to enterprise LAN
Hi guys
I need to setup server/router in my firm. We got from our ISP dedicated server in their data center. It has a static IP and it servers as replacement for out DSL connection. I configured our internal server to be border gateway and to connects to data center. "Remote" admin installed squid and IT staff can access to the websites but other can't. I want to remove that proxy server. I think I really don't need it.
Here is the picture how above situation looks
Server router has two NICs, one is connected to ISP router which we can't access, and one nic is connected to our private LAN. I use CentOS Linux 6.5 x64 to act as router. I added in iptables firewall to forward all traffic from eth0 to eth1 (from internal to public) and allowed traffic to leave server. All output traffic is nated.
Problem is on the other site. I'm not a network engineer but only with some knowledge in networking and formal IT education at the firm. My problem is I can't ping anything on the Internet while our VPS can. On that same server only port 80 and 22 are opened. People who setup proxy can connect to outside world but can't ping, can't use other networking software.
I have some questions:
How I can see my private LAN from ISP network, I will need to setup VPN in the short time ?
Is possible to avoid proxy and just with firewall NAT get data from the net back to the hosts in the private LAN ?
I am afraid to mess with ISP server because they administrate that server, we are and I really won't to understand how configure a network.
Thanks for reading and suggestions.
I need to setup server/router in my firm. We got from our ISP dedicated server in their data center. It has a static IP and it servers as replacement for out DSL connection. I configured our internal server to be border gateway and to connects to data center. "Remote" admin installed squid and IT staff can access to the websites but other can't. I want to remove that proxy server. I think I really don't need it.
Here is the picture how above situation looks
Server router has two NICs, one is connected to ISP router which we can't access, and one nic is connected to our private LAN. I use CentOS Linux 6.5 x64 to act as router. I added in iptables firewall to forward all traffic from eth0 to eth1 (from internal to public) and allowed traffic to leave server. All output traffic is nated.
Problem is on the other site. I'm not a network engineer but only with some knowledge in networking and formal IT education at the firm. My problem is I can't ping anything on the Internet while our VPS can. On that same server only port 80 and 22 are opened. People who setup proxy can connect to outside world but can't ping, can't use other networking software.
I have some questions:
How I can see my private LAN from ISP network, I will need to setup VPN in the short time ?
Is possible to avoid proxy and just with firewall NAT get data from the net back to the hosts in the private LAN ?
I am afraid to mess with ISP server because they administrate that server, we are and I really won't to understand how configure a network.
Thanks for reading and suggestions.
Last edited by solaris_user; 07-16-2014 at 07:26 PM..
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LEARN ABOUT DEBIAN
gnunet-nat-server
GNUNET-NAT-SERVER(1) General Commands Manual GNUNET-NAT-SERVER(1) NAME
gnunet-nat-server - help GNUnet setup test network setup with NAT SYNOPSIS
gnunet-nat-server [options] PORT DESCRIPTION
Normal GNUnet end-users should not concern themselves with gnunet-nat-server. In fact, distributions are encouraged to consider not ship- ping it at all. Running gnunet-nat-server's is similar to running hostlist servers: it is a special service to the community with special requirements and no benefit to those running the service. This program will listen on the specified PORT for incoming requests to test a peer's network connectivity. Incoming requests can ask it to connect to a given IPv4 address (and port) using TCP or UDP and to send a 2-byte test message using the specified address. The program can also be asked to send a "fake" ICMP response message to a given IPv4 address (for autonomous NAT traversal --- see the description in the respective research paper). The idea is that gnunet-nat-server will be run on some trusted hosts with unrestricted connectivity to allow GNUnet users to test their network configuration. As written, the code allows any user on the Internet to cause the gnunet-nat-server to send 2-bytes of arbitrary data to any TCP or UDP port at any address. We believe that this is generally harmless. When running gnunet-nat-server, make sure to use a configuration that disables most NAT options but enables 'enable_nat_client' and sets 'internal_address' to the global IP address of your local host. Also, the gnunet-helper-nat-client should be installed locally and run with root privileges (SUID), otherwise the gnunet-nat-server will not work properly. Note that gnunet-nat-server could be run via gnunet-arm but typically is not. Also, the name of the host and port that gnunet-nat-server is run on should be specified in the NATSERVER option in the [setup] section of the configuration file of hosts that are supposed to auto- configure with this server. OPTIONS
-c FILENAME, --config=FILENAME Use the configuration file FILENAME. BUGS
Report bugs by using Mantis <https://gnunet.org/bugs/> or by sending electronic mail to <gnunet-developers@gnu.org> SEE ALSO
gnunet-transport(1) GNUnet 25 Feb 2012 GNUNET-NAT-SERVER(1)