how to tell if your kernal has been buil with IP_FORWARD and/or IP_FIREWALL

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2 total messages Started by Javy Llora Thu, 01 May 1997 00:00

#254

Author: Javy Llora
Date: Thu, 01 May 1997 00:00

27 lines
1248 bytes


Hi.

I'm trying to set up two linux routers as firewalls. 

I was wondering if there was any way of *directly* telling if a kernel
has been built with IP_FORWARDING and/or IP_FIREWALL?

The reason is that the forwarding works on one of the routers but not
the other and I think their using the same kernel. (I copied it
across)

However, Its hard to tell if the IP_FORWARING is there simply by using
ping etc since it could be a host of other routining and networking
issues.

TIA.
Cheers,


Javy


Javy Llora  (:                | Golden 3 Technology           
jbllora@golden3.com.au        | http://www.golden3.com.au
* To reply via email, remove ".junkproof" from the address *

Re: how to tell if your kernal has been buil with IP_FORWARD and/or IP_FIREWALL

#260

Author: rod
Date: Sat, 03 May 1997 00:00

25 lines
1315 bytes

Javy Llora, jbllora@golden3.com.au.junkproof journeyed into
	another dimension with: 
 >
 >Hi.
 >
 >I'm trying to set up two linux routers as firewalls. 
 >
 >I was wondering if there was any way of *directly* telling if a kernel
 >has been built with IP_FORWARDING and/or IP_FIREWALL?


	Something like:
	
	cat /proc/ksyms |grep ip_forw
	
	or from vmlinux:
	
	nm /usr/src/linux/vmlinux|grep ip_forw
	
	You'd need to check the exact symbol names.

-- 
Oscar is the last Wilde refuge of the
consistently  unimaginative -- aristoddler

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