ouverture de ports UDP 161 et 162Fermé

Question

bonsoir à tous,
je  suis en fin de cycle et mon projet consiste l'etude de protocole snmp.jai avancé dans l projet mais il ya toujour un problème de connexion entre deux machine puisque le sujet consiste a l'administration d'une machine à partir d'une autre.je n sais pas si le problème reside dans le fichier de configuration puisque snmp.conf est toujour vide et il accepte pas les modification que jai fai mais on a decouvert que les deux ports udp 161 et 162 sont fermés et pour que la connexion marche jai besoin de les ouvrir.
je travaille sous ubuntu et en utilisant le java comme langage de programmation.
s'il ya une personne qui sait comment je peux ouvrir ces deux ports qu'il m'aide svp.
c'est vraiment urgent aidez moi svp on a plus largement den temps.
svp jattend votre aide.
merci d'avance.

zsxaqw · Answer

ya personne qui peut m'aider !!!!!!!!!!!

babar161 · Answer

ba s'il sont pas ouvert c'est que tu doit avoir un pare feu qq part ...
reste a savoir lequel est-ce et à ajouter les regles (peut etre iptables).

Ou alors ta un routeur ou un switch qui peut te le bloquer, je ne sais pas dans quel environnement tu est

zsxaqw · Answer

bonsoir,merci babar161 pour votre reponse. oui c'est vrai mon par-feu étais fermé. j'ai pu ouvrir le port 162.Puisque je travaille sous ubuntu donc ce dernier a un parfeu celui de ufw
 pour l'activé il faut juste faire ufw enable sous terminal sous mode root  et pour ouvrir celui de udp c'est ufw allow 162 aprés pour vérifié il faut faire ufw status.mon application marche actuellement entre vista et ubuntu mais jai toujour un problème de connexion entre ubuntu et ubuntu.
pour le rappel:j'utilise le protocole snmp et mon projet conssiste a créer un réseau local en connectant plusieurs ordinateurs et permettre a un administrateurs de contrôler l réseaux.il peut modifier ou ajouter des information à la base de donné qui est la MIB d'un autre Pc a distance.comme j'ai di dans le premier message, le fichier de configuration SNMP.conf je le trouve toujour vide je n sais si c'est ça qui cause le problème de connexion entre ubuntu ubuntu.
svp si vous pouvez m'aider.
merci d'avance .

babar161 · Answer

moi aussi je suis en train de galérer sur snmp ^^ donc niveau conseil ca va etre assez rapide lol

par contre je peux te dire comment j'ai fait moi. C'est pas pour un pc, mais un switch pour moi.
Je suis sous SUSE et j'ai pris cacti.
Une fois cacti installer, par défaut il te crée un graphique de ton hote via snmp.
Aprés tu peux en rajouter.

Pour le fichier snmp.conf, c'est normal qu'il soit vide, parce que c'est le fichier snmpd.conf qu'il faut remplir (enfin pour moi c'est celui là ^^)

voici celui que j'ai.
# Please see /usr/share/doc/packages/net-snmp/EXAMPLE.conf for a
# more complete example and snmpd.conf(5).
#
# Writing is disabled by default for security reasons.  If you'd like
# to enable it uncomment the rwcommunity line and change the community
# name to something nominally secure (keeping in mind that this is
# transmitted in clear text).

# don't use ' < > in strings for syslocation or syscontact
# Note that if you define the following here you won't be able to change
# them with snmpset
syslocation Server Room
syscontact Sysadmin (root@localhost)

# These really aren't meant for production use.  They include all MIBS
# and can use considerable resources.  See snmpd.conf(5) for information
# on setting up groups and limiting MIBS.
rocommunity public 127.0.0.1
# rwcommunity mysecret 127.0.0.1

zsxaqw · Answer

merci babar c'est bien de trouver une personne qui travaille presque sur l même thème que moi. pour le fichier snmp.conf j'ai cru que je devais le remplir et a chaque fois que j'essaye il refise les modification apporter quand je fais restart.Pour le fichier snmpd il est rempli et même j'ai ajouté quelque instruction et j'ai modifié d'autre voici son contenu mais il est un peu long: ############################################################################### # # EXAMPLE.conf: # An example configuration file for configuring the ucd-snmp snmpd agent. # ############################################################################### # # This file is intended to only be an example. If, however, you want # to use it, it should be placed in /etc/snmp/snmpd.conf. # When the snmpd agent starts up, this is where it will look for it. # # You might be interested in generating your own snmpd.conf file using # the "snmpconf" program (perl script) instead. It's a nice menu # based interface to writing well commented configuration files. Try it! # # Note: This file is automatically generated from EXAMPLE.conf.def. # Do NOT read the EXAMPLE.conf.def file! Instead, after you have run # configure & make, and then make sure you read the EXAMPLE.conf file # instead, as it will tailor itself to your configuration. # When the snmpd agent starts up, this is where it will look for it. # # You might be interested in generating your own snmpd.conf file using # the "snmpconf" program (perl script) instead. It's a nice menu # based interface to writing well commented configuration files. Try it! # # Note: This file is automatically generated from EXAMPLE.conf.def. # Do NOT read the EXAMPLE.conf.def file! Instead, after you have run # configure & make, and then make sure you read the EXAMPLE.conf file # instead, as it will tailor itself to your configuration. # All lines beginning with a '#' are comments and are intended for you # to read. All other lines are configuration commands for the agent. # # PLEASE: read the snmpd.conf(5) manual page as well! # # instead, as it will tailor itself to your configuration. # All lines beginning with a '#' are comments and are intended for you # to read. All other lines are configuration commands for the agent. # # PLEASE: read the snmpd.conf(5) manual page as well! # ############################################################################### # Access Control ############################################################################### # YOU SHOULD CHANGE THE "COMMUNITY" TOKEN BELOW TO A NEW KEYWORD ONLY # KNOWN AT YOUR SITE. YOU *MUST* CHANGE THE NETWORK TOKEN BELOW TO # SOMETHING REFLECTING YOUR LOCAL NETWORK ADDRESS SPACE. # By far, the most common question I get about the agent is "why won't # it work?", when really it should be "how do I configure the agent to # allow me to access it?" # # By default, the agent responds to the "public" community for read # only access, if run out of the box without any configuration file in # place. The following examples show you other ways of configuring # the agent so that you can change the community names, and give # yourself write access as well. # # The following lines change the access permissions of the agent so # that the COMMUNITY string provides read-only access to your entire # NETWORK (EG: 10.10.10.0/24), and read/write access to only the # localhost (127.0.0.1, not its real ipaddress). # # For more information, read the FAQ as well as the snmpd.conf(5) # manual page. ##### First, map the community name (COMMUNITY) into a security name # (local and mynetwork, depending on where the request is coming # from): # sec.name source community com2sec paranoid default public #com2sec readonly default public com2sec readwrite default private com2sec readwrite 192.168.0.2 private com2sec readwrite 192.168.0.1 private #### # Second, map the security names into group names: # sec.model sec.name group MyROSystem v1 paranoid group MyROSystem v2c paranoid group MyROSystem usm paranoid group MyROGroup v1 readonly group MyROGroup v2c readonly group MyROGroup usm readonly group MyRWGroup v1 readwrite group MyRWGroup v2c readwrite group MyRWGroup usm readwrite group MyRWGroup v1 192.168.0.1 group MyRWGroup v1 192.168.0.2 group MyRWGroup v2c 192.168.0.1 group MyRWGroup v2c 192.168.0.2#### #### # Third, create a view for us to let the groups have rights to: # incl/excl subtree mask view all included .1 80 view system included .iso.org.dod.internet.mgmt.mib-2.system #### # Finally, grant the 2 groups access to the 1 view with different # write permissions: # context sec.model sec.level match read write notif access MyROSystem "" any noauth exact system none none access MyROGroup "" any noauth exact all none none access MyRWGroup "" any noauth exact all all none # ----------------------------------------------------------------------------- # Traps and v2 traps enabled and sent to localhost # # command host manager community trapsink localhost private trap2sink localhost private #SECTION Trap Destinations #trapcommunity: Defaut trap sink community to use #arguments: community string trapcommunity secret #trapsink: A SNMPv1 trap receiver #arguments: host [community][portnum] trapsink localhost trapsink network #définie dans le fichier de conf de snmp et représente le réseau # on peut également spécifier par adresse IP, # ex : trapsink 192.168.10.42 #inform: A SNMPv2 inform (acknowedged trap receiver) #arguments: host [community][portnum] informsink localhost informsink network #authtrapenable: Should we send traps when authentification failures occur #arguments: 1|2 (1=yes, 2=no) authtrapenable 1 ############################################################################### # System contact information # # It is also possible to set the sysContact and sysLocation system # variables through the snmpd.conf file. **PLEASE NOTE** that setting # the value of these objects here makes these objects READ-ONLY # (regardless of any access control settings). Any attempt to set the # value of an object whose value is given here will fail with an error # status of notWritable. syslocation Unknown (configure /etc/snmp/snmpd.local.conf) syscontact Root (configure /etc/snmp/snmpd.local.conf) # Example output of snmpwalk: # % snmpwalk -v 1 -c public localhost system # system.sysDescr.0 = "SunOS name sun4c" # system.sysObjectID.0 = OID: enterprises.ucdavis.ucdSnmpAgent.sunos4 # system.sysUpTime.0 = Timeticks: (595637548) 68 days, 22:32:55 # system.sysContact.0 = "Me " # system.sysName.0 = "name" # system.sysLocation.0 = "Right here, right now." # system.sysServices.0 = 72 ----------------------------------------------------------------------------- ############################################################################### # Process checks. # # The following are examples of how to use the agent to check for # processes running on the host. The syntax looks something like: # # proc NAME [MAX=0] [MIN=0] # # NAME: the name of the process to check for. It must match # exactly (ie, http will not find httpd processes). # MAX: the maximum number allowed to be running. Defaults to 0. # MIN: the minimum number to be running. Defaults to 0. # # Examples: # # Make sure mountd is running #proc mountd # Make sure there are no more than 4 ntalkds running, but 0 is ok too. #proc ntalkd 4 # Make sure at least one sendmail, but less than or equal to 10 are running. #proc sendmail 10 1 # A snmpwalk of the prTable would look something like this: # # % snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.2 # enterprises.ucdavis.procTable.prEntry.prIndex.1 = 1 # enterprises.ucdavis.procTable.prEntry.prIndex.2 = 2 # enterprises.ucdavis.procTable.prEntry.prIndex.3 = 3 # enterprises.ucdavis.procTable.prEntry.prNames.1 = "mountd" # enterprises.ucdavis.procTable.prEntry.prNames.2 = "ntalkd" # enterprises.ucdavis.procTable.prEntry.prNames.3 = "sendmail" # enterprises.ucdavis.procTable.prEntry.prMin.1 = 0 # enterprises.ucdavis.procTable.prEntry.prMin.2 = 0 # enterprises.ucdavis.procTable.prEntry.prMin.3 = 1 # enterprises.ucdavis.procTable.prEntry.prMax.1 = 0 # enterprises.ucdavis.procTable.prEntry.prMax.2 = 4 # enterprises.ucdavis.procTable.prEntry.prMax.3 = 10 # enterprises.ucdavis.procTable.prEntry.prCount.1 = 0 # enterprises.ucdavis.procTable.prEntry.prCount.2 = 0 # enterprises.ucdavis.procTable.prEntry.prCount.3 = 1 # enterprises.ucdavis.procTable.prEntry.prErrorFlag.1 = 1 # enterprises.ucdavis.procTable.prEntry.prErrorFlag.2 = 0 # enterprises.ucdavis.procTable.prEntry.prErrorFlag.3 = 0 # enterprises.ucdavis.procTable.prEntry.prErrMessage.1 = "No mountd process run$ # enterprises.ucdavis.procTable.prEntry.prErrMessage.2 = "" # enterprises.ucdavis.procTable.prEntry.prErrMessage.3 = "" # enterprises.ucdavis.procTable.prEntry.prErrFix.1 = 0 # enterprises.ucdavis.procTable.prEntry.prErrFix.2 = 0 # enterprises.ucdavis.procTable.prEntry.prErrFix.3 = 0 # # Note that the errorFlag for mountd is set to 1 because one is not # running (in this case an rpc.mountd is, but thats not good enough), # and the ErrMessage tells you what's wrong. The configuration # imposed in the snmpd.conf file is also shown. # # Special Case: When the min and max numbers are both 0, it assumes # you want a max of infinity and a min of 1. # # ----------------------------------------------------------------------------- ############################################################################### # Executables/scripts # # # You can also have programs run by the agent that return a single # line of output and an exit code. Here are two examples. # # exec NAME PROGRAM [ARGS ...] # # NAME: A generic name. # PROGRAM: The program to run. Include the path! # ARGS: optional arguments to be passed to the program # a simple hello world #exec echotest /bin/echo hello world # Run a shell script containing: # # #!/bin/sh # echo hello world # echo hi there # exit 35 # # Note: this has been specifically commented out to prevent # accidental security holes due to someone else on your system writing # a /tmp/shtest before you do. Uncomment to use it. # #exec shelltest /bin/sh /tmp/shtest # Then, # % snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.8 # enterprises.ucdavis.extTable.extEntry.extIndex.1 = 1 # enterprises.ucdavis.extTable.extEntry.extIndex.2 = 2 # enterprises.ucdavis.extTable.extEntry.extNames.1 = "echotest" # enterprises.ucdavis.extTable.extEntry.extNames.2 = "shelltest" # enterprises.ucdavis.extTable.extEntry.extCommand.1 = "/bin/echo hello world" # enterprises.ucdavis.extTable.extEntry.extCommand.2 = "/bin/sh /tmp/shtest" # enterprises.ucdavis.extTable.extEntry.extResult.1 = 0 # enterprises.ucdavis.extTable.extEntry.extResult.2 = 35 # enterprises.ucdavis.extTable.extEntry.extOutput.1 = "hello world." # enterprises.ucdavis.extTable.extEntry.extOutput.2 = "hello world." # enterprises.ucdavis.extTable.extEntry.extErrFix.1 = 0 # enterprises.ucdavis.extTable.extEntry.extErrFix.2 = 0 # Note that the second line of the /tmp/shtest shell script is cut # off. Also note that the exit status of 35 was returned. # ----------------------------------------------------------------------------- ############################################################################### # disk checks # # The agent can check the amount of available disk space, and make # sure it is above a set limit. # disk PATH [MIN=DEFDISKMINIMUMSPACE] # # PATH: mount path to the disk in question. # MIN: Disks with space below this value will have the Mib's errorFlag set. # Default value = DEFDISKMINIMUMSPACE. # # PATH: mount path to the disk in question. # MIN: Disks with space below this value will have the Mib's errorFlag set. # Default value = DEFDISKMINIMUMSPACE. # Check the / partition and make sure it contains at least 10 megs. #disk / 10000 # % snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.9 # enterprises.ucdavis.diskTable.dskEntry.diskIndex.1 = 0 # enterprises.ucdavis.diskTable.dskEntry.diskPath.1 = "/" Hex: 2F # enterprises.ucdavis.diskTable.dskEntry.diskDevice.1 = "/dev/dsk/c201d6s0" # ----------------------------------------------------------------------------- ############################################################################### # load average checks # # load [1MAX=DEFMAXLOADAVE] [5MAX=DEFMAXLOADAVE] [15MAX=DEFMAXLOADAVE] # # 1MAX: If the 1 minute load average is above this limit at query # time, the errorFlag will be set. # 5MAX: Similar, but for 5 min average. # 15MAX: Similar, but for 15 min average. # Check for loads: #load 12 14 14 # % snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.10 # enterprises.ucdavis.loadTable.laEntry.loadaveIndex.1 = 1 # enterprises.ucdavis.loadTable.laEntry.loadaveIndex.2 = 2 # enterprises.ucdavis.loadTable.laEntry.loadaveIndex.3 = 3 # enterprises.ucdavis.loadTable.laEntry.loadaveNames.1 = "Load-1" # enterprises.ucdavis.loadTable.laEntry.loadaveNames.2 = "Load-5" # enterprises.ucdavis.loadTable.laEntry.loadaveNames.3 = "Load-15" # enterprises.ucdavis.loadTable.laEntry.loadaveLoad.1 = "0.49" Hex: 30 2E 34 $ # enterprises.ucdavis.loadTable.laEntry.loadaveLoad.2 = "0.31" Hex: 30 2E 33 $ # enterprises.ucdavis.loadTable.laEntry.loadaveLoad.3 = "0.26" Hex: 30 2E 32 $ # enterprises.ucdavis.loadTable.laEntry.loadaveConfig.1 = "12.00" # enterprises.ucdavis.loadTable.laEntry.loadaveConfig.2 = "14.00" # enterprises.ucdavis.loadTable.laEntry.loadaveConfig.3 = "14.00" # enterprises.ucdavis.loadTable.laEntry.loadaveErrorFlag.1 = 0 # enterprises.ucdavis.loadTable.laEntry.loadaveErrorFlag.2 = 0 # enterprises.ucdavis.loadTable.laEntry.loadaveErrorFlag.3 = 0 # enterprises.ucdavis.loadTable.laEntry.loadaveErrMessage.1 = "" # enterprises.ucdavis.loadTable.laEntry.loadaveErrMessage.2 = "" # enterprises.ucdavis.loadTable.laEntry.loadaveErrMessage.3 = "" # ---------------------------------------------------------------------------$ #############################################################################$ # Extensible sections. # # This alleviates the multiple line output problem found in the # previous executable mib by placing each mib in its own mib table: # Run a shell script containing: # # #!/bin/sh # echo hello world # echo hi there # exit 35 # # Note: this has been specifically commented out to prevent # accidental security holes due to someone else on your system writing # a /tmp/shtest before you do. Uncomment to use it. # # exec .1.3.6.1.4.1.2021.50 shelltest /bin/sh /tmp/shtest # % snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.50 # enterprises.ucdavis.50.1.1 = 1 # enterprises.ucdavis.50.2.1 = "shelltest" # enterprises.ucdavis.50.3.1 = "/bin/sh /tmp/shtest" # enterprises.ucdavis.50.100.1 = 35 # enterprises.ucdavis.50.101.1 = "hello world." # enterprises.ucdavis.50.101.2 = "hi there." # enterprises.ucdavis.50.102.1 = 0 # Now the Output has grown to two lines, and we can see the 'hi # there.' output as the second line from our shell script. # # Note that you must alter the mib.txt file to be correct if you want # the .50.* outputs above to change to reasonable text descriptions. # Other ideas: # # exec .1.3.6.1.4.1.2021.51 ps /bin/ps # exec .1.3.6.1.4.1.2021.52 top /usr/local/bin/top # exec .1.3.6.1.4.1.2021.53 mailq /usr/bin/mailq # ---------------------------------------------------------------------------$ #############################################################################$ # Pass through control. # # Usage: # pass MIBOID EXEC-COMMAND # # This will pass total control of the mib underneath the MIBOID # portion of the mib to the EXEC-COMMAND. # # Note: You'll have to change the path of the passtest script to your # source directory or install it in the given location. # # Example: (see the script for details) # (commented out here since it requires that you place the # script in the right location. (its not installed by default)) # pass .1.3.6.1.4.1.2021.255 /bin/sh /usr/local/passtest # % snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.255 # enterprises.ucdavis.255.1 = "life the universe and everything" # enterprises.ucdavis.255.2.1 = 42 # enterprises.ucdavis.255.2.2 = OID: 42.42.42 # enterprises.ucdavis.255.3 = Timeticks: (363136200) 42 days, 0:42:42 # enterprises.ucdavis.255.4 = IpAddress: 127.0.0.1 # enterprises.ucdavis.255.5 = 42 # enterprises.ucdavis.255.6 = Gauge: 42 # # % snmpget -v 1 -c public localhost .1.3.6.1.4.1.2021.255.5 # enterprises.ucdavis.255.5 = 42 # # % snmpset -v 1 -c public localhost .1.3.6.1.4.1.2021.255.1 s "New string" # enterprises.ucdavis.255.1 = "New string" # # For specific usage information, see the man/snmpd.conf.5 manual page # as well as the local/passtest script used in the above example. #############################################################################$ # Subagent control # # The agent can support subagents using a number of extension mechanisms. # From the 4.2.1 release, AgentX support is being compiled in by default. # To use this mechanism, simply uncomment the following directive. # # master agentx # # Please see the file README.agentx for more details. # #############################################################################$ # Further Information # # See the snmpd.conf manual page, and the output of "snmpd -H". # MUCH more can be done with the snmpd.conf than is shown as an # example here. c'est trop long!!! j'ai fai des modifications sur les deux partie souligné jai doné des droi de R/W a la machine distante.pour l'instant j'utilise seulment deux machine à qui j'ai donné des adresses.donc svp si vous trouvez des erreurs au niveau des modification ou s'il ya des chose à ajoutter vous l'indiquer. une autre chose pour la modification de l'adresse Ip d'une machine a distance je sais qu'on doit utiliser un SET mais la syntaxe exacte je la connais pasesque on dois préciser le OID ou il suffit juste de donner la nouvelle adresse. merci d'avance.

babar161 · Answer

yop!

désolé j'était un peu occupé ces derniers jours.

Par contre je suis pas super fort en linux, donc je ne pourrais pas trop t'aider sur ta configuration ...

Par contre ce que je peux faire, c'est te passer mes fichiers de conf, ainsi qu'un compte rendu sommaire pour refaire la meme chose que chez moi, c'est a dire avoir des graphiques pour un switch procurve d'hp.
J'ai expliquer comment installer cacti, et ajouter des graphiques selon son OID (et d'illeur tu as déjà des graphiques préfait concernant ton localhost quand tu installe cacti).

Pour ce qui est des OID, moi aussi je ne pige pas tout, je ne sais pas vraiment les gérer... je les trouve un peu par ci par là sur le net, et aprés je les tests avec snmpget ^^

Si ca te dit d'avoir tout ca, fait moi signe et envoi moi un mp pour ton adresse mail.
@++

mcdenc · Answer

bonjour, 

petite notion que je n'ai pas vu sur diffèrent tuto.
une fois que vous êtes sur que votre infra snmpd répond bien.
je veux dire réponse positif à : snmpwalk machinedouhaité -c public -v1

Interface web Cacti:
mors de votre fiche edit devices:
n'oublier pas de définir la version snmp: dans mon cas version 1 (moins secure que la version 3)

le fait de stipuler la version évite une retour négatif. style: No SNMP data returned
quand vous lancer le debug sous cacti: Verbose Query

@+

Ouverture de ports UDP 161 et 162

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