snmpget()

[trp]

Hi there,

I am trying to write a simple network management website that allows me to see what is on my network and interact with it, I am hoping to use the 'snmpget()' function to 'grab' all the devices in a subnet.

 

Here is the code I have so far:

	$current_ip = "192.168.0.10";

	$scan = snmpget($current_ip, "public", "system.SysContact.0");
	echo $scan;

 

I *think* that should work, it, however just breaks the page on which it sits 

 

Can anyone give me any insights as to what I may be doing wrong, or how I can use SNMP & PHP to discover devices on my network?

 

Many Thanks (in advance!)

 

TRP

[aeroswat]

Hi there,

I am trying to write a simple network management website that allows me to see what is on my network and interact with it, I am hoping to use the 'snmpget()' function to 'grab' all the devices in a subnet.

 

Here is the code I have so far:

	$current_ip = "192.168.0.10";

	$scan = snmpget($current_ip, "public", "system.SysContact.0");
	echo $scan;

 

I *think* that should work, it, however just breaks the page on which it sits 

 

Can anyone give me any insights as to what I may be doing wrong, or how I can use SNMP & PHP to discover devices on my network?

 

Many Thanks (in advance!)

 

TRP

 

Using windows?

[trp]

Yes, Windows Server 2003 with Apache 2.2, PHP & MySQL, sorry for not including that in the first post.

TRP

[aeroswat]

From what I'm reading you can't use sysObjectID.0 in Windows versions. Apparently you have to use numeric id's. It recommends to google "cisco snmp object navigator"

[trp]

I am looking for *any* SNMP object on the network, basically I want it to create a device list of clients / PC's on my network.. So I am unsure how to set such a number, especially when it looks as if it will be quite specific..?

[trp]

bump.

Anyone got any idea's how I can pull this off?

 

Even just to get some useful output would be good.. currently, even when running it with a MIB it just 'breaks' the rest of the page..

[trp]

Just noticed that there is no mention of SNMP in the phpinfo file.. should there be if it is all working correctly? As there isn't, what do I need to do?

[aeroswat]

http://bugs.php.net/45883

 

if it doesn't show up then it shouldn't even recognize the functions as being defined.

[trp]

Ok then, maybe a stupid problem, how do I run something like "./configure --with-snmp" when compiling PHP as it is already compiled and running.. ?

[aeroswat]

Ok then, maybe a stupid problem, how do I run something like "./configure --with-snmp" when compiling PHP as it is already compiled and running.. ?

 

recompile source?

[trp]

OK, that at least means the page doesn't just "break" stupid oversight!

I still get no useful information back, it takes a few seconds to load the page (I assume while it does the snmpget operation) but does not echo anything back, I am trying different MIBS etc but if anyone can see an obvious hole in what I am doing / would be able to take a closer look with me, that would be great.

 

Thanks for your help so far

[trp]

Hey guys,

Time to start this one up again, having had some time off I am now back on working on this.

 

Current code is as follows:

$current_ip = "192.168.1.1";
$scan = snmpget($current_ip, "public", "1.3.6.1.2.1.2.2.1.7");
echo $scan;

 

This is a valid IP on the network (it's a Linksys Wireless N router) and I have tried it with others.

The MIB is extracted from the following website - MRTG: http://oss.oetiker.ch/mrtg/doc/mrtg-mibhelp.en.html

Descriptor: ifAdminStatus

Identifier: 1.3.6.1.2.1.2.2.1.7

ASN.1 Syntax: INTEGER

Enumeration: up 1, down 2, testing 3

 

There is simply no output from the function, what am I doing wrong here? I am pulling my hair out!

[trp]

*bump*