Question

Static routing issue - Urgent!

Asked by: seruas

Hi Guys,

I have a box with 4 network interfaces and I want to route the traffic between then no firewall enable no NAT is internal IP's only so I have:

on my mygate I've 10.50.2.1
Iforwarding enable already
net.inet.ip.forwarding=1  

my route output is
Internet:
Destination        Gateway            Flags    Refs      Use    Mtu  Interface
default            RTR01              UGS         3     2574      -   vr0
10.50.2/23         link#1             UC          5        0      -   vr0
10.50.2.1              00:60:43:81:a7:6d  UHLc        1        0      -   vr0
AAM01              00:00:24:c9:58:9c  UHLc        1        9      -   vr0
AAM02              00:00:24:c9:58:80  UHLc        1       38      -   lo0
loopback           localhost          UGRS        0        0  33208   lo0
localhost          localhost          UH          1        0  33208   lo0
192.168.38/24      192.168.38.1       UGS         0       15      -   vr3
192.168.50/24      link#2             UC          2        0      -   vr1

-------------------------------
vr0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:00:24:c9:58:80
        groups: egress
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet 10.50.2.4 netmask 0xfffffe00 broadcast 10.50.3.255
        inet6 fe80::200:24ff:fec9:5880%vr0 prefixlen 64 scopeid 0x1
vr1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:00:24:c9:58:81
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet 192.168.50.253 netmask 0xffffff00 broadcast 192.168.50.255
        inet6 fe80::200:24ff:fec9:5881%vr1 prefixlen 64 scopeid 0x2
vr2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:00:24:c9:58:82
        media: Ethernet autoselect (none)
        status: no carrier
        inet 192.168.101.2 netmask 0xffffff00 broadcast 192.168.101.255
        inet6 fe80::200:24ff:fec9:5882%vr2 prefixlen 64 scopeid 0x3
vr3: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:00:24:c9:58:83
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet 192.168.38.12 netmask 0xffffff00 broadcast 192.168.38.255
        inet6 fe80::200:24ff:fec9:5883%vr3 prefixlen 64 scopeid 0x4

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2008-08-29 at 06:17:49ID23688737
Tags

OpenBSD

,

OpenBSD 4.3

,

routing 4 network cards

Topics

OpenBSD

,

Linux Networking

,

Linux Setup

Participating Experts
2
Points
500
Comments
11

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. FreeBSD NAT - 2 class A routed NICs
    Parts of IP address have been replaced with ????'s to protect innocent network adapters: Problem: My new(second) class A NIC isn't routing to the class C address I specify. Details: I have a freeBSD5.1 firewall/nat that has three NICs in it called fxp0, fxp1, and fxp2. I r...
  2. NAT
    I am trying to forward port 3389(remote desktop) on Cisco Soho 91, but forwarding is not working if I have ACL and firewall turn on. Config: ip inspect name myfw cuseeme timeout 3600 ip inspect name myfw ftp timeout 3600 ip inspect name myfw rcmd timeout 3600 ip inspect nam...
  3. PIX MTU issues on PPPoE connection
    I am connecting two offices using a through a cisco PIX to PIX VPN. The main office's 506 PIX is connected to a T1. The remote office 501 PIX is connected using a DSL (PPPoE) connection. When I try access files on the remote server at the main office, I get slow performanc...
  4. PIX 506 Duplex speed change
    I want to change the internal interface speed. For some reason my download speed has decreased to 70 Kbps. I have reset the pix a few times and reset the modem, the switch is new. I want to change the duplex speed on my internal interface. but it says.. ethernet1 can only be ...
  5. Cisco NAT overloading
    I am trying to configure a Cisco 837. I have most of what I want working but I am having some difficulty with the NAT rules. I have a number of static IP addresses available to me and I would like to NAT groups of inside local IP addresses to single static global IP addresses...

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: seruasPosted on 2008-08-30 at 05:23:03ID: 22351515

Let's put this way if I have 3 interfaces what I need to be able to ping hosts inside the 3 diferent networks?

Thanks,
Seruas

 

by: giltjrPosted on 2008-08-30 at 06:21:57ID: 22351826

Where do you want to ping from?  The box that has the 4 NIC's or other computers on each subnet.

I beleive that you are trying to use the computer with 4 NIC's as a router, in which case you need to make sure that:

     computers on the 192.168.38.0/24 subnet need to point to 192.168.38.12
     computers on the 192.168.101.0/24 subnet need to point to 192.168.101.2
     computers on the 192.168.50.0/24 subnet need to point to 192.168.50.253
     computers on the 10.50.2.0/23 subnet need to point to 10.50.2.4

Now if you have multiple routers in your network, it starts getting a bit more complex, as you may need multiple routes on each computer.



 

by: RedimidoPosted on 2008-08-30 at 09:22:37ID: 22352388

right.

in order for the computers on each subnet, to know this linux box is the gateway for the other three subnets, you need either:

a) have this linux box as your default gateway. that's all.
b) add on each computer a route statement for each subnet saying the linux box is the gateway for that subnet. one for each other subnet you want them to access, and add them into their autoexec.bat, or in a .bat executed when they login, or *maybe* (I have not made it work) using dhcp.
in the case of WinXP and newer, you can enter to the network interface tcp/ip config and add these routes statically.

here is how to add if the bsd box is not the default gateway:

joined togheter:
for computers on the network living on vr0:
route add 192.168.50.0  MASK 255.255.255.0 192.168.50.253
route add 192.168.101.0 MASK 255.255.255.0 192.168.101.2
route add 192.168.38.0  MASK 255.255.255.0 192.168.38.12
 
for computers on the network living on vr1:
route add 10.50.2.0     MASK 255.255.255.0 10.50.2.4
route add 192.168.101.0 MASK 255.255.255.0 192.168.101.2
route add 192.168.38.0  MASK 255.255.255.0 192.168.38.12
 
for computers on the network living on vr2:
route add 10.50.2.0     MASK 255.255.255.0 10.50.2.4
route add 192.168.50.0  MASK 255.255.255.0 192.168.50.253
route add 192.168.38.0  MASK 255.255.255.0 192.168.38.12
 
for computers on the network living on vr3:
route add 10.50.2.0     MASK 255.255.255.0 10.50.2.4
route add 192.168.50.0  MASK 255.255.255.0 192.168.50.253
route add 192.168.101.0 MASK 255.255.255.0 192.168.101.2
                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:

Select allOpen in new window

 

by: seruasPosted on 2008-08-31 at 13:49:19ID: 22356307

Hi giltj,

I want to ping from 192.168.38.X to 192.168.50.x and 10.50.2.x as well (the 192.168.101.0 network is not in use right now)

The problem here is the equipment on the net 10.50.2x and 192.168.50.x have the default gateway pointing to a adsl modem (with one interface only) instead of the OpenBSD box with the 4 interfaces but even I specify a manual route from 192.168.50.x for the network 192.168.38.x I can see the OpenBSD receiving the request but the box doesn't forward to the to the correct interface.
I almost 99% sure that a need to put the OpenBSD box in front of the modem and change the Gateway to the OpenBSD box.

I will test this solution.

Thanks a lot,
Seruas

 

by: RedimidoPosted on 2008-08-31 at 14:51:27ID: 22356509

that is the usual solution. put the bsd as your default gateway can give you the benefit of adding user access control and filters, and also increase speed using a proxy-cache like squid

regards

 

by: giltjrPosted on 2008-08-31 at 14:59:41ID: 22356536

You can either do as Redimido stated, make the BSD box as your default gateway  and have it (the BSD box) have the DSL modem as its default gateway, which I would say is the preferred solution.

Or in your ADSL modem code a static route for 192.168.0.0/16 pointing to 10.50.2.4.

Either will work, its just which box do you want to control your routing.

 

by: seruasPosted on 2008-09-02 at 01:12:28ID: 22365000

I can't add the BSD as default gateway for all network because the network 192.168.38.x already have their default route what i did was add a static route to the BSD box so I can ping any interface on the OpenBSD boc but the BSD box doesn't forward the bloody request to other network for example:

ping from a host on 192.168.38.69 (my laptop with a static route to 10.58.2.x gw  192.168.38.12) to 10.58.2.10 , I get this:

C:\>tracert 10.50.2.10

Tracing route to 10.50.2.10 over a maximum of 30 hops

  1    <1 ms    <1 ms    <1 ms  192.168.38.12
   2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
 
The BSD doesn't forward inside the 10.50.2.x network.

 

by: giltjrPosted on 2008-09-02 at 03:21:48ID: 22365763

You don't know that the BSD box is not forwarding.  All you know is that you did not get a response back.

Did you add a route to 10.50.2.10 that points to the BSD box (10.50.2.4)?  If you did not, then that box (10.50.2.10) does not know how to get back to the 192.168.38.0/24 subnet.

Do you have iptables (firewall) enabled on the BSD box?  If so, then you either need to disable it, or configure it to allow the traffic you want.

If the 192.168.38.0/24 network already has a default gateway then you have three options:

   1) Add the necessary route to use the BSD box to every PC in that subnet.
   2) Add the necessary route to use the BSD box to the default gateway in the subnet.
   3) Forget whatever it is you are trying to do.

 

by: seruasPosted on 2008-09-02 at 07:41:33ID: 22367749

Hi guys,

Thank you for your help but is more complex than I've posted so I've figured whats happen and add some static routes is a long explanation to add in here but thank you very much for all posts.

 Cheers,
Sergio

 

by: seruasPosted on 2008-09-02 at 07:45:34ID: 22367783

thank you guys!!

much appreciated!!

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...