Dear community,
since I am a german guy, excuse gramatical mistakes.
I create a proxy to hide my application servers public IP from my customers.
I am actually using those 3 lines
(for testing reasons I am forwarding the traffic which connects to the ubuntu proxy to my apache webserver (5.196.130.245:80)
I show this to a friend/competitor and he said, lol, with this code ur "hiding" the costumers IP in ur Database logs
(for example, they use the register formular on the website username, password registerIP - and with my 3 lines of code the register IP is the proxys IP in every single case but he told me he got a way to see even the real Users IP, even if they connecting through the proxy)
So he sent me the following Picture of his script
Any1 knows / is able to describe me what he has done better / other than me? I cannot see any routing cmds in his script.
I'm now almost searching 5 days for a solution and this is my last hope to find it.
EDIT: okay, I just found out that this Script for setting up the iptables is not for forwarding any traffic.
For the redirecting/forwarding part he is using HAPROXY.
regards,
Julian
Last edited by tschulian; 11-25-2014 at 04:13 PM..
Reason: code tags not icode ... thanks
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LEARN ABOUT NETBSD
tftp-proxy
TFTP-PROXY(8) BSD System Manager's Manual TFTP-PROXY(8)NAME
tftp-proxy -- Internet Trivial File Transfer Protocol proxy
SYNOPSIS
tftp-proxy [-v] [-w transwait]
DESCRIPTION
tftp-proxy is a proxy for the Internet Trivial File Transfer Protocol invoked by the inetd(8) internet server. TFTP connections should be
redirected to the proxy using the pf(4) rdr command, after which the proxy connects to the server on behalf of the client.
The proxy establishes a pf(4) rdr rule using the anchor facility to rewrite packets between the client and the server. Once the rule is
established, tftp-proxy forwards the initial request from the client to the server to begin the transfer. After transwait seconds, the pf(4)
NAT state is assumed to have been established and the rdr rule is deleted and the program exits. Once the transfer between the client and
the server is completed, the NAT state will naturally expire.
Assuming the TFTP command request is from $client to $server, the proxy connected to the server using the $proxy source address, and $port is
negotiated, tftp-proxy adds the following rule to the anchor:
rdr proto udp from $server to $proxy port $port -> $client
The options are as follows:
-v Log the connection and request information to syslogd(8).
-w transwait
Number of seconds to wait for the data transmission to begin before removing the pf(4) rdr rule. The default is 2 seconds.
CONFIGURATION
To make use of the proxy, pf.conf(5) needs the following rules. The anchors are mandatory. Adjust the rules as needed for your configura-
tion.
In the NAT section:
nat on $ext_if from $int_if -> ($ext_if:0)
no nat on $ext_if to port tftp
rdr-anchor "tftp-proxy/*"
rdr on $int_if proto udp from $lan to any port tftp ->
127.0.0.1 port 6969
In the filter section, an anchor must be added to hold the pass rules:
anchor "tftp-proxy/*"
inetd(8) must be configured to spawn the proxy on the port that packets are being forwarded to by pf(4). An example inetd.conf(5) entry fol-
lows:
127.0.0.1:6969 dgram udp wait root
/usr/libexec/tftp-proxy tftp-proxy
SEE ALSO tftp(1), pf(4), pf.conf(5), ftp-proxy(8), inetd(8), syslogd(8), tftpd(8)CAVEATS
tftp-proxy chroots to /var/chroot/tftp-proxy and changes to user ``_proxy'' to drop privileges.
BSD May 31, 2007 BSD
11-25-2014
