search for: snate

...-A PREROUTING -d 10.1.0.3 -j DNAT --to 192.168.1.2 iptables -t nat -A POSTROUTING -s 192.168.1.2 -j SNAT --from 10.1.0.3 I do this for all server on alternating IP-adresses and lines. Eventually at the very end of the POSTROUTING-chain i got a catch-all SNAT for all workstations in INTNET to get SNATed access to the internet (only routed via one line): iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j SNAT --from 10.1.0.1 (where 10.1.0.1 is a designated IP address only used for the workstations - the server all got their own IP-address. Works so far. Now my problem: If a workstation from the...

...blic IP (1.2.3.4) with the gateway 1.2.3.1 2) an allocated IP class with 64 addresses (5.6.7.192/26) 3) two LANs connected through two NICs: a) 192.168.0.0/24 on eth1 (192.168.0.1) b) 10.0.0.0/24 on eth2 (10.0.0.1) The IPs from the allocated class are all assigned to eth0. The networks are SNATed to the external IP and to all IPs in the allocated class in a round-robin fashion. (-j SNAT --to 1.2.3.4 lowest_IP_in_class highest_IP_in_class) My question is: Is it possible to assign one IP from my allocated class to an internal machine without changing eth1 or eth2 IPs *OR* without adding a...

Hi list, I am a happy user of shorewall, i have followed the instructions in the shorewall''s web site relative to the squid transparent proxy configuration,all works ok, but i have been instructed to let adicional specified ports (aplications) to be snated (allowed to run) together to the web browsing service,i mean if i snat the network (i have a static ip from my isp), all aplications(kazaa, msn messenger,etc) can run, without snat the users only can browse the internet, the other aplications don''t work,how can i also permit i.e. smtp (p...

Hi i have read the all the docs and try to deploy the load balance and QoS using my 4 links (DSL links) My setup looks like below LAN ----Local IP-----Connected to Linux Box Eth1 Eth5-- connected to one DSL1 Eth4-- connected to one DSL2 Eth3-- connected to one DSL3 Eth2-- connected to one DSL4 iam marking them in prerouting randomly and puting them in table and snating at POSROUTING

...Severity: enhancement Priority: P5 Component: conntrack Assignee: netfilter-buglog at lists.netfilter.org Reporter: korn-netfilter.org at elan.rulez.org I have a firewall where sometimes NAT rules change so that certain UDP connections that were not SNATed before should be SNATed now. Before the NAT rules go up, the affected packets are passed but the connections end up in the UNREPLIED state; however, due to connection tracking, these sessions get stuck in this state if the source keeps sending new UDP packets. I would like to be able to flush un...

...uests coming from the lan, i have to avoid the server answering directly => SNAT necessary. DNAT loc loc:server_ip tcp http,smtp - $NET_IP:$LOC_IP => OK BUT... PROBLEM : -------------- when this 2nd rule is defined, connections coming from net zone are also SNATed ???????? so all requests to server seem to come from $LOC_IP :-( shorewall versions : - 2.0.1 on mandrake 10.0 official (native package) - 2.0.9 on the same box (installed from tgz file ) i''m still wondering what i missed... help please...

...Z"Kbit tc qdisc add dev $INTERFAZ_DMZ parent 1:5 handle 5: sfq perturb 10 tc filter add dev $INTERFAZ_DMZ parent 1: protocol ip prio 1 u32 match ip dst 192.168.100.0/24 classid 1:5 It has allocated 64 Kbit for downloading for the ip range of 192.168.100.0/24. (DMZ ZONE) Rememmber, this is a SNATed firewall. Now, What I nedd is to subdivide this 64 kbit bandwidth *32kbit for WWW and 32 Kbit for mail**. Can I subdivide in that way ? If divided , What will happen to other services such as ICMP, SSH, ACK etc ? *Then, How can I achieve this task? * I modfied the the above script . This is wha...

Hello, people. I read iptables tutorial and lartc, but i''m still confused with one trouble. May be this question was discussed already, so forward me solution, if is. So, there''s a trouble. I have debian etch linux. 2.6.18-4 kernel. On this computer i have three interfaces: eth0 - my lan, eth1, eth2 - providers. By default all internet traffic routed through eth2. But i

Helo to all, I am attempting to establish an IPSEC tunnel to a remote freeswan G/W with my laptop. My laptop sits in behind shorewall at home. From the documentation, this is what I Modified in Shorewall: /etc/shorewall/tunnels: ipsec loc 24.65.x.x /etc/shorewall/policy vpn loc ACCEPT loc vpn ACCEPT My question is, have I left anything out?

Hi, Is it possible to configure libvirt to use NFSv4 for a pool? I am doing some iptables SNATing and rpc.statd can't handle it. Thanks, Paul -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20101014/7a771fe1/attachment.htm>

...default via <gateway of isp1> dev eth0 I left the default routing table (254) unchanged except for the default route: ''default via <gateway of isp2> dev ppp0 As described in an earlier post in this list, the rp_filter has to be disabled and the traffic for eth0 has to be SNATed to the IP of the interface as the kernel uses the IP of the ppp0 interface as source IP of every package. However, I do not require to set up any other fancy routing entries described in the lartc howto to make the whole thing to work. The question is, am I missing an important point here? F...

...-user-pub I tried using SNAT on gw2 so that instead of 172.16.0.2 I would get one of the public ip addresses I have on gw2. It seems that packets with ttl time exceeded in transit get through to the mangle table in POSTROUTING but no longer reach the nat table in POSTROUTING (so they no longer get SNATed). The same thing happens to these kind of icmp packets if I try to SNAT them on gw1. Tcpdump just shows me 172.16.0.2 each time, exitting the public interfaces and the nat rule counter does not increase.. I also tried marking packets in mangle table and then seeing if that same mark reaches the...

...Version: All Status: NEW Severity: major Priority: P2 Component: NAT AssignedTo: laforge@netfilter.org ReportedBy: renean@gmx.de I have a router. To the outside world i have to do NAT. All packats going over the external interface are being SNATed by the one and only rule in the POSTROUTING-chain (see below). What happens is that some packages from my internal net somehow bypass that NAT and go out with their internal addresses (${SOURCE}). My ISP informed me about that. It seems that applications spawning many connections trigger that pr...

Gentlefolk, First, many thanks to EVERYONE that tries so hard to make this advanced routing stuff useful to the "...rest of us"! You all rock! I have been prowling the archives of this list for an answer to my problem, and have seen some close situations, but no joy. Yet. I''ve got a relatively simple setup I''m trying to get working: we''ve got a

Hello, I have the following setup on linux 2.6.32... CentOS 6.x : ipsec tunnel eth0-10.255.3.254/25 - eth1-pub add1 <-> eth1-pub add2 - eth0-10.255.5.254/25 I am trying to SNAT remote private address 10.255.5.128/25 packets when they come out of the ipsec tunnel to make it appear like it was from local address 10.255.3.254. I am doing a source ping from the right side to a device on the

...e doing. Unfortunately what it should be doing is not what you want it to be doing. > (Note: I don''t know if the returning connections are SNAT''d back to 200.200.64.139) A simple TCPDump will tell you if this is the case or not. However, I suspect that the packets are being SNATed to 100.100.251.218. > Is there a way around this? i.e. so that the multihoming still works? Yes, multiple. One is to make your office router know that it can reach the 200.200.64.139 host via the 100.100.251.218 router. However, this is probably not what you really want to do. I say this i...

As suggested on the netfilter list, I''m posting here too: Current network layout: Internet | ----100.100.251.217---- / (router) \ Internet | | | 100.100.251.220 100.100.251.218

Hi, I''ve been implementing a load balancing solution using CONNMARK, based on solution described by Luciano Ruete at [1]. Gracias por el post y por apuntar en la dirección correcta Luciano! Once implemented, I''ve found that due to some reason packets aren''t properly marked (or improperly remarked) and sent out using the wrong interface. My topo setup is:

Hi all, I need a little help, i am studing htb to control user bandwidth (download/upload) and I made a script as below to test. I am testing using ttcp tool from by linux box to other linux (192.168.200.51). my box <---- Linux = more than 128kbit mybot -----> Linux = get 128kbit But I want to control both ways, what am I missing? script: EXTIF=eth0 INTIF=eth1 TC=/sbin/tc DOWN=128

A most puzzling network conundrum has arisen while I was attempting to create a virtual network behind a virtual router which in turn connects the virtual network to my real network. My machine (192.168.103.23) is on the network with my router (192.168.103.1). The virtual router, tiara, has to connect my 192.168.103.* network with the virtual 10.0.0.* network which comprises two other virtual