General :: Forward All Traffic From One IP To Another IP On OS X
Apr 9, 2010
I have two IP address on my iMac I want to "bridge". I'm not sure what the proper terminology is... here's the situation.
My iMac has a firewire connection to my laptop and an ethernet connection to the rest of my office. My laptop has an ip of 192.168.100.2 (on the firewire interface). My iMac has an IP of 192.168.100.1 on the firewire interface, and two IPs, 10.1.0.6 and 10.1.0.7, on it's ethernet interface.
If I wanted to forward all traffic coming in from 192.168.100.2 on my OS X machine to go out on IP 10.1.0.7, and vice-versa, can this be done? I assume I would use the ipfw command.
Essentially I want to "bridge" the firewire network to the ethernet network so my laptop can see all the machines on the 10.1 network, and all those machines can see my laptop at 10.1.0.7. Is this possible?
View 3 Replies
ADVERTISEMENT
Sep 29, 2010
I need to set up my centOS computer as a firewall in my home network. Ive got 2 interfaces, eth0 and eth1. I want to allow and forward all traffic on eth0 and block all traffic on eth1 except ssh, ping(icmp) and DNS. How do I do this? Ive tried some editing in /etc/sysconfig/iptables but no luck.
View 1 Replies
View Related
Jul 29, 2009
I have a (virtual) server with 3 NIC's: 1 external (inet), 1 local and 1 DMZ. This server is my gateway.
I would like my internal network, where every server has a static 192.168.0.x IP, to access the internet via the gateway.
That means the traffic has to pass from the 'local' NIC to the 'external' NIC, connected to the internet.
Which setting do I change to accomplish this ?
Please check the sceenshot (attachment) for my current setup
View 4 Replies
View Related
Jun 2, 2011
My kind isp had set up a authoratitive dns server that can't be cancelled that points to the wrong ip address. Hence I need to take all the traffic going into server A at the ip address aa.aa.aa.aa and send it all onto server B at ip address bb.bb.bb.bb. After much head scratching, I managed to achieve it as follows:- On the server at ip address A, set up following :-
iptables -t nat -A PREROUTING -d aa.aa.aa.aa -j DNAT --to bb.bb.bb.bb
iptables -t nat -A POSTROUTING -d bb.bb.bb.bb -j MASQUERADE
View 1 Replies
View Related
Jul 25, 2010
I need to be able to do the following: Physical Router located at 192.168.40.1 On Ubuntu 10.04 Lucid machine:
eth0 with static ip 192.168.40.2
eth1 with static ip 192.168.40.3
eth2 with static ip 192.168.40.4
Associate a virtual address to eth1 with an entirely different network address such as 192.168.50.1 Do the same (virtual address) for eth2 -- e.g. 192.168.60.1 In the application:
register phone number A at 192.168.40.1 (The application will automatically use eth0 for this)
register phone number B at 192.168.50.1
register phone number C at 192.168.60.1
Somehow forward all traffic (including the register request) sent to 192.168.50.1 to 192.168.40.1 as if the register had been made directly to 192.168.40.1. In other words, the app "sends" registration and traffic to 192.168.50.1 but then Ubuntu forwards it to 192.168.40.1 (but the app does not know that). Similarly, forward all traffic sent to 192.168.60.1 to the router at 192.168.40.1.
Do the same for the reverse, forward all traffic that the router sends back to 192.168.40.3 (eth1) to 192.168.50.1 (within the Ubuntu machine) so that the app knows it is for phone B. Similarly forward all traffic that the router sends back to 192.168.40.4 (eth2) to 192.168.60.1 so that the app knows it is for phone C. Thus, the application believes that it is registering at 3 completely separate routers on 3 completely separate networks via 3 separate network interfaces but in fact is really registering all three to the same router (but does not know that). Similarly, the router believes that it is receiving 3 separate registrations because it receives each registration request and traffic from 3 separate interfaces and thus 3 separate mac addresses (i.e., of eth0, eth1, and eth2). Traffic sent to and from the router for each of the 3 phone numbers (via eth0, eth1, and eth2) are not mixed because the translation happens in both directions.
View 10 Replies
View Related
Jul 25, 2010
I need to be able to do the following: Physical Router located at 192.168.40.1
On Ubuntu 10.04 Lucid machine:
eth0 with static ip 192.168.40.2
eth1 with static ip 192.168.40.3
eth2 with static ip 192.168.40.4
Associate a virtual address to eth1 with an entirely different network address such as 192.168.50.1 Do the same (virtual address) for eth2 -- e.g. 192.168.60.1 In the application:
register phone number A at 192.168.40.1 (The application will automatically use eth0 for this)
register phone number B at 192.168.50.1
register phone number C at 192.168.60.1
Somehow forward all traffic (including the register request) sent to 192.168.50.1 to 192.168.40.1 as if the register had been made directly to 192.168.40.1. In other words, the app "sends" registration and traffic to 192.168.50.1 but then Ubuntu forwards it to 192.168.40.1 (but the app does not know that). Similarly, forward all traffic sent to 192.168.60.1 to the router at 192.168.40.1.
Do the same for the reverse, forward all traffic that the router sends back to 192.168.40.3 (eth1) to 192.168.50.1 (within the Ubuntu machine) so that the app knows it is for phone B. Similarly forward all traffic that the router sends back to 192.168.40.4 (eth2) to 192.168.60.1 so that the app knows it is for phone C. Thus, the application believes that it is registering at 3 completely separate routers on 3 completely separate networks via 3 separate network interfaces but in fact is really registering all three to the same router (but does not know that). Similarly, the router believes that it is receiving 3 separate registrations because it receives each registration request and traffic from 3 separate interfaces and thus 3 separate mac addresses (i.e., of eth0, eth1, and eth2). Traffic sent to and from the router for each of the 3 phone numbers (via eth0, eth1, and eth2) are not mixed because the translation happens in both directions.
View 9 Replies
View Related
May 10, 2011
I am trying to set up a Linux box that can act as a router (and firewall later). I have a Debian 5 installation and it has two nics in it. I am trying to use the linux route command to set up a route between the two interfaces. I am finding it difficult to do. Let me explain how I am trying to set up my network: I have the ethernet cable from my modem connecting to eth0 of my Debian box, then I have eth1 connecting to a switch, which I connect all my computers and other devices to. I want to have two different ip address schemes for the devices. So here is my interfaces file:
Code:
#eth0 connects to modem
allow-hotplug eth0
iface eth0 inet static
[code]....
So I am wondering, to get my ethernet traffic from eth0 to eth1 and vice versa, do I need to make it so the Gateway for Destination 192.168.1.0 is 10.1.1.1, and for Destination 10.0.0.0, Gateway 192.168.1.0? I have looked at the linux manpage for route and I am still confused. I have also looked at the Debian networking page, but it is still unclear to me how to do this. how I am to use the route command to get this working? Or am I not even supposed to use the route command?
View 4 Replies
View Related
May 5, 2010
The network in my company use Squid Proxy serveto browse internet.Browser is IE or Firefox, and OS is Windows XP.The company need to use a new software for work, but the software don't have function that can configure Proxy server to connect to Server outside.I don't want to NAT port on router because I cannot control the traffic.Is there any software same as Proxy Client ... installed on Windows XP?My idea is that the software same as ISA server - ISA client
View 1 Replies
View Related
Jan 29, 2010
I have a server on my router on the DMZ. All outside traffic goes to it. This server has Apache running and the domain mysite.com resolves to the the DMZ web server. I have a second server on the LAN that also has apache running. I want to set up another domain, myothersite.com to resolve to the second server on the LAN. Since the main server is on DMZ I have the DNS A records for myothersite.com pointing to the public IP that the DMZ is on.
How do I get myothersite.com to resolve to the second webserver on the LAN? What configuration do I need to do on my DMZ server so it routes traffic for myothersite.com to the other server on teh LAN? Do I use BIND DNS? If so please advise on how to set that up. BIND DNS seems confusing and I having trouble knowing how to configuring it. Is there another option besides BIND?
View 2 Replies
View Related
May 16, 2011
How do I redirect all the UDP traffic on port 27016 of my current dedicated server to a new IP port 27015 using IP tables?
View 1 Replies
View Related
Mar 3, 2010
How can I forward all traffic from a public IP to another public IP. Let's say I have a first debian box named box1 with eth0 = 1.1.1.1 and eth0:1 = 1.1.1.2 and I want to forward all traffic from 1.1.1.2 to "box2" located somewhere else over the internet and having for eth0 2.2.2.2 Both 1.1.1.0/24 and 3.3.3.0/24 are public IP ranges.
View 1 Replies
View Related
Sep 27, 2009
Recently I notice that when I'm connected to an vpn server (pptpd) and I'm using it as a default gateway my download and upload speed decreases almost to the half of the usual speed. I made a test using iptables in order to count how much GRE packets are generated (except the real traffic itself) in that way:
Code:
iptables -I INPUT -p gre -j ACCEPT
iptables -I OUTPUT -p gre -j ACCEPT
iptables -I FORWARD -s 172.16.10.101 -j ACCEPT
iptables -I FORWARD -d 172.16.10.101 -j ACCEPT
The first 2 rules match all GRE packets between the pptpd server and client, and the next rules - the traffic between the server and the client.
When I turn the counters to zero and begin to generate traffic (to browse, to download etc.) I see that the GRE packets are even more than these in the FORWARD chain.
So, my question is first of all is my test correct and is it true that so much gre traffic is being generated during the browsing (it becames clear that the traffic is double than if the pptpd wasn't used as a gateway) and if yes - can that traffic be reduced?
View 3 Replies
View Related
Apr 27, 2010
We have something on our network that is reaking havoc with our content filter. I am trying to track it down, but so far I have been unsuccessful. We have approximately 500 devices in 100+ different locations spread across 9 states. Looking at each computer is not really feasible.
I need a machine that can sit in between our network and our internet connection and graphically monitor in real time and logs how much traffic each device is sending and receiving. It would need to sit inline so it has to have two nics and be able to pass traffic. The machine also needs to be transparent. Reconfiguration of our routers or workstations is not an option.
I have used ethereal and wireshark before. Ethereal may be a viable option, but wireshark seems to provide lots of information, but no practical way to make use of it. how to set up the box to be a transparent device on the network that will allow internet bound traffic to flow (freely)?
View 3 Replies
View Related
Mar 15, 2011
I wanted to tell my server to block all traffic but US only traffic. So i followed this guide:[URL].. Now I know, it's the best way to help prevent hackers/crackers (doesn't matter to me what they are called. I just have to stop them). My server only deals with US clients anyways so might as well just start right there for my server's security before getting into the brute force and injection preventions. So I got it all done compiled everything moved to the proper directory. I then started to setup my iptables. Like so
Code: iptables -F INPUT
iptables -F OUTPUT
iptables -I INPUT 1 -s *.*.*.* -p tcp --dport 22 -j ACCEPT
iptables -I INPUT 2 -s *.*.*.* -p tcp -j ACCEPT
[Code]...
After seeing that i went digging in the code and figured it was something todo with memory allocation.
View 1 Replies
View Related
Jan 7, 2010
I am trying to do a NAT forward in iptables but get the following error:Quote:[root@server88-xxx-xxx-198 openvpn]# iptables -t nat -I POSTROUTING -i tun0 -o eiptables v1.3.5: Can't use -i with POSTROUTINGAny ideas on what to do?I have an OpenVON server running and I need the client to use the ports on the OpenVPN server
View 8 Replies
View Related
Feb 17, 2009
I have a computer with a BSD subsystem that is acting as a router to other Windows computers.
On one of my Windows, I have an Apache Web Server that I want people to access from the outside world.
So, I have created an ipfw rule in my router computer that goes like this: ipfw add 100 fwd 10.0.2.2 ip from any to any dst-port 2443
Thing is, nothing happens.
I've tried changing the ServerName in my Apache to match my IP address (which is the destination IP of the incoming packets, I imagine) but still, nothing.
View 1 Replies
View Related
Oct 10, 2010
My company is changing it's mail subdomain...Example: [URL]. I wanted to build a sendmail box up to handle this until all the sending parties get the new address. I'm sure it's in the rewrite hearder part of sendmail.cf but I just don't understand how to doit.
View 2 Replies
View Related
Feb 1, 2010
We are currently having a windows virus outbreak in our corporate network, all the it guys using windows machines and they are infected of course.
My question is I have a internet enabled ubuntu 9.10 machine with two nics.
eth0 is for internet and I wanna distribute my internet connection from my other nic.
There are alotta switches and access points in our network but i placed my ubuntu desktop just like the infected windows machine. Everything seems working except other clients internet connections.
How to share internet connection on eth0 to eth1
View 2 Replies
View Related
Dec 29, 2010
I am trying to find a way to tell postfix to forward all emails from
dbsupport@thisdomain.com
and
helpdesk@thisdomain.com
to
be sent to admins@thatdomain.com, but it is not working. I am trying transport maps. The content of my transport file is:
Quote:
helpdesk@thisdomain.com smtp:admins@thatdomain.com
Quote:
dbsupport@thisdomain.com smtp:admins@thatdomain.com
Both [URL] and [URL] are on box1 as an alias in the /etc/alias file like this:
root: helpdesk@thisdomain.com
root: dbsupport@thisdomain.com
how to get this working?
View 1 Replies
View Related
Jul 28, 2010
My router has two bridges, br0 and br1. I'm sharing wifi access, and the guest subnet will be 192.168.2.x.The home subnet will be 192.168.1.x. I want all traffic destined for port 80 from the guest net to forward to a proxy port on a box on the home network. That's the only traffic I want to cross the bridges. How do I set this up with iptables on the router?
View 1 Replies
View Related
Feb 9, 2011
Just setup an ssh server...kinda. I need to forward the port (22) through my router. I have forwarded ports before for programs so the whole thing isnt a mystery. But i need to know what to put in for a couple boxes.... Private ip: ? protocol type: tcp, udp, or both?
View 3 Replies
View Related
Sep 8, 2010
the time on system clock given with 'date' command keeps moving forward about 1 minute for every hour of realtime. The box is up all the time so this is not an issue with motherboard battery. An equivalent box with the same hardwre/OS and applications doesn't have the same level of drift. I'm not sure what else this could be.Both boxes are Centos 5.2 64-bit.
View 2 Replies
View Related
Nov 22, 2010
easier way to forward email, in postfix, from a user to one domain for the user without listing every domain and user name? Example:send all of user joe's email to joe@somewhere, in which there are mulitple domains other than "somewhere".
Usual Given Example-
/etc/postfix/virtual:
joe@example.com joe@somewhere
jane@example.com jane@somewhere-else
[code]....
I'm looking for an easier way to forward email, verses having (ex) 50 different lines for 5 users and 10 domains.
View 2 Replies
View Related
Sep 23, 2010
I don't have idea how could I create a script that will forward my email from postfix to a script automatically to sms gateway right now I can receive a mail from solarwinds and I'm done configuring my kannel sms gateway .Could anyway help me how could I send my email-> sms automatically using script?
View 1 Replies
View Related
Mar 6, 2011
I've always been curious about this but say that you had computer A which runs headless and had music that you wanted to hear from computer B. Sure you can setup vlc or icecast on computer A and stream it. But what if you could forward the sound over netcat. For example, say when you play a sound file on Computer A data gets sent to /dev/snd.Would be possible to do something like the following.
Computer B
nc -lvp 6666 > /dev/snd
Computer A
cat /dev/snd | nc -v -w 5 computer_b 6666
And be able to hear sound playing on Computer A? point me in the right direction to find out about how to do this?
View 1 Replies
View Related
May 19, 2010
I work with RHEL, and have instaled DHCP server on it. Sometimes it is happen this bad behaviour:
May 19 10:52:34 alpha dhcpd: DHCPDISCOVER from 00:1f:3c:91:9b:ba (LENOVO-C3236B87) via 10.192.31.0
May 19 10:52:35 alpha dhcpd: DHCPOFFER on 10.192.31.230 to 00:1f:3c:91:9b:ba (LENOVO-C3236B87) via 10.192.31.0
[Code].....
View 2 Replies
View Related
Mar 3, 2010
How can I move around the bash commandline efficiently?In the Windows prompt, one can go back or forward one word by pressing ctrl and <-/->.What's the equivalent in a bash environment?
View 1 Replies
View Related
Jun 11, 2010
Suppose you have glibc 2.5 compiled with kernel headers 2.6.18. Is it safe to run this glibc with Linux kernel 2.6.32? Is it safe to run this glibc with Linux kernel 2.6.9?
View 1 Replies
View Related
Sep 6, 2011
Is it possible to use cd command to navigate back and forward (like browser)?. Something similar to cd - but it only swaps current and last location. I know I can push dir on stack, it would be great to use cd -> and cd <-, though.
View 3 Replies
View Related
Sep 24, 2009
I'm running Ubuntu Desktop 9.10. How do I get it to forward its logs to a syslog server (its running on a different machine)?
View 2 Replies
View Related
