similar to: ACCEPT vs DNAT

I have some hosts in a DMZ zone with proxyarp. In my local zone I have a host to which I DNAT. I have discovered that I can reach the host in the local zone by attempting to connect to the fw (As expected) or ANY proxyarped host in my dmz zone (as not expected). Is this normal ? (I''ve just discovered that actually the dnated host answers to requests sent to any IP routed to my host!)

I have been trying to get DNAT to work and I actually have succeeded too, however, not how I thought it would work when reading through the documentation. 1. No matter what I do I cannot get DNAT to work unless I have an entry in eiter the nat or the proxyarp file. Is that really how it''s supposed to be? I can''t find anything about it in the documentation. 2. Also, in the

I''ve upgraded a 3-interface system from 2.0.8 to 3.2.6 on Debian, and I''m not able to make DNAT work anymore. If someone could offer a suggestion of where to look to fix this, it would be very much appreciated. Problem Summary: If I set DETECT_DNAT_IPADDRS=Yes, then I can''t access anything on my DMZ via DNAT. If I set DETECT_DNAT_IPADDRS=No, then **EVERYTHING**

I''ve upgraded a 3-interface system from 2.0.8 to 3.2.6 on Debian, and I''m not able to make DNAT work anymore. If someone could offer a suggestion of where to look to fix this, it would be very much appreciated. Problem Summary: If I set DETECT_DNAT_IPADDRS=Yes, then I can''t access anything on my DMZ via DNAT. If I set DETECT_DNAT_IPADDRS=No, then **EVERYTHING**

Hi. Im setting up a web farm test lab. I have a number of machines in the test last on a dmz zone on network 10.20.30.0. The test lab firewall has two NICS. One (eth0) has two ip addresses, eth0 10.161.101.40 and eth0:0 10.161.10.49. The other one, eth1 is on a private network, 10.20.30.0. I want to use DNAT to allow test engineers to ssh into the machines in the web farm. I have

Hi, I have an DNAT ISSUE with PREROUTING. This is my setup. I have 2 firewalls running iptables. Pls asume 1.2.3.4/29 is the internet interace of FIRST firewall. 2.3.4.5/29 is the internet interface of SECOND firewall. it has DMZ zone. in that DMZ zone, mail server runnig @ 192.168.100.3 Now I want to DNAT port 25 of FISRT firewall (i.e - its ip address - 1.2.3.4/29) to the internet ip

Hi, just cracking my head how to solve this: Firewall has more than one public IP Address and NET/LOC/DMZ configured. Requests on public 1.1.1.2:80 should go to dmz:192.168.0.1:80 Requests on public 1.1.1.3:80 should go to dmz:192.168.0.2:80 How can I manage that with DNAT? I tried it with the original destination, but keep getting "REFUSED" always for one connection. Thx Andy

Hello list, I am in the process of switching from IPCOP to Shorewall s the firewall for our small office. I very much like the fact that Shorewall runs on top of the same OS (openSuSE 11.4) that I run on the server and my desktop. Our setup is fairly straightforward. We have 8 static ip addresses from our ISP, which provides a cable modem and a Cisco 800 series router. The ip addresses are

Hi all in the ShoreWall community, [please CC me since I''m not on the list] I had been using FIAIF for a little while, and the setup of ShoreWall has been much easier, the config for each operation in one place, and I''m very happy with it. That said, it looks like one of the concepts could be taken a bit further. In this case, it is actions. To get the process started, I

Some probably wish v1.2.12-2 out of Debian Woody would just go away, but it''s what I''m using and really don''t wish to upgrade at this time (but will eventually). My needs are rather simple and I''m sure it can handle the job. I''ve read and re-read the FAQs and searched extensively for docs on what my problem might be, but just cannot put my finger

Hi, I am running a ASTERISK BOX behind a firewall. It is at DMZ . Now I want to connect to my ASTERISK BOX from Internet. So I want to DNAT. How can I do it? Pls assume that ip address that connects to Internet on firewall is 1.2.3.4and is attached to eth0. And ASTERISK BOX is 192.168.101.23 Then, What is the rule (PREROUTING) for it? What is the port to DNAT? I think udp 5060. So I have

Hi, I have an DNAT ISSUE with PREROUTING. This is my setup. I have 2 firewalls running iptables. Pls asume 1.2.3.4/29 is the internet interace of FIRST firewall. 2.3.4.5/29 is the internet interface of SECOND firewall. it has DMZ zone. in that DMZ zone, mail server runnig @ 192.168.100.3 Now I want to DNAT port 25 of FISRT firewall ( i.e - its ip address - 1.2.3.4/29) to the internet ip

Hello all, I have been putting together a shorewall firewall together for a couple of days, but have hit a bit of a dead end. I am using Shorewall 3.0.5 Shorewall has detected the following iptables/netfilter capabilities: NAT: Available Packet Mangling: Available Multi-port Match: Available Extended Multi-port Match: Available Connection Tracking Match: Available Packet Type

Hi list, This is my first post there. CONTEXT : -------------- I have a little lan behind a shorewalled box (internet) -- NET_IP [gateway] LOC-IP -- (lan X.Y.0.0) internet -> net zone connected to the gateway via a ppp interface lan -> loc zone connected to the gateway via eth1 NET_IP and LOC_IP are defined in shorewall params file GOAL : --------- i want to forward http and

Hi, i''m a shorewall users and i have the following problem: I have one class C range of IP''s and i have three zones (net, dmz , loc) I need create one rule to dnat one valid ip address (but not in use in one computer) to one invalid host in my loc zone. How i do? I try this: DNAT net:200.200.200.200 dmz:200.193.137.38 tcp 137,138,139,445 -

Hi! First of all, let me say a big "thank you" to Tom for creating shorewall. I''ve been using it for a few months now and it''s such a relief to not have to resort to OpenBSD''s pf (which is so much more sane than Linux'' iptables madness) for the most basic firewalling tasks. I have a question that I didn''t seem to be able to find in the FAQ.

# shorewall version 3.2.1 SNAT is enabled. Setting up DNAT to do port forwarding -- this example looked exactly like what I wanted: (FAQ 1c) From the internet, I want to connect to port 1022 on my firewall and have the firewall forward the connection to port 22 on local system 192.168.1.3. How do I do that? In /etc/shorewall/rules: #ACTION SOURCE DEST PROTO DEST PORT

I''ve had some issues with my network, and I''ve had to reconfigure my Gibraltar CD. It runs shorewall 1.4.8, and I have a 2-interface setup, so I downloaded the relevant files from the install page. Masq and such works, but I''m having a problem with my port forwarding. It works for port 22, but it doesn''t seem to work for any other port. I''ve turned

Hi all, I want to run vsftp behind a firewall.(i.e DMZ zone) . It is runnig as passive ftp. the theroy behind passive ftp is , - FTP server's port 21 from anywhere ( Client initiates connection) - FTP server's port 21 to ports > 1024 (Server responds to client's control port) - FTP server's ports > 1024 from anywhere (Client initiates data connection to

Hello Tom and all, Quick question: Is it possible to operate an OpenVPN server from behind a firewall? Is it as simple as setting it up and placing: DNAT net loc:192.168.10.20 udp 5000 - ipaddress -- Paul Slinski -o) Network Administrator /\ Global IQX, Inc. _\_v Global IQX is the leader in integrated e-business automation solutions for the group life and health insurance