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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 LINUX
cachemgr.cgi
cachemgr.cgi(8) System Manager's Manual cachemgr.cgi(8) NAME
cachemgr.cgi - squid HTTP proxy manager interface SYNOPSIS
http://your.server/cgi-bin/cachemgr.cgi DESCRIPTION
The cache manager (cachemgr.cgi) is a CGI utility for displaying statistics about the Squid HTTP proxy process as it runs. The cache man- ager is a convenient way to manage the cache and view statistics without logging into the server. FILES
./cachemgr.conf @DEFAULT_CACHEMGR_CONFIG@ The access configuration file defining which Squid servers may be managed via this cachemgr.cgi program. Each line specifies a server:port followed by an optional description The server name may contain shell wildcard characters such as *, [] etc. A quick selection dropdown menu is automatically con- structed from the simple server names. Specifying :port is optional. If not specified then the default proxy port is assumed. :* or :any matches any port on the target server. SECURITY
cachemgr.cgi calls the requested server on the requested port using HTTP and returns a formatted version of the response. To avoid abuse it is recommended to configure your web server to restrict access to the cachemgr.cgi program. Configuration examples for many common web servers can be found in the Squid FAQ. SEE ALSO
squid(8) The Squid FAQ, Chapter 9 The Cache Manager Squid Web Proxy 3.1.20 cachemgr.cgi(8)