راه اندازی SNMP روی CentOS 6

yum install net-snmp-utils snmp snmpd

/etc/snmp/snmpd.conf

rocommunity publicString
com2sec local localhost 192.168.192.202
com2sec network_l 192.168.192.0/24
group MyROGroup_1 v2c local
group MyROGroup_1 v2c network_1
view all-mibs included .1 80
access MyROGroup_1 .. v1 noauth exact all-mibs none none
access MyROGroup_2 .. v2c noauth exact all-mibs none none

/etc/init.d/snmpd start
chkconfig snmpd on

snmpwalk -v 1 -c publicString -O e 127.0.0.1

تنظیم تعداد زیادی آنتن Mikrotik به صورت خودکار

for host in list_of_hosts:
 user = 'admin'.encode('ascii')
 password = ''.encode('ascii')

try:
 END = b'\r\n'
 tn = telnetlib.Telnet(host, port=23)
 tn.read_until(b'Login: ')
 tn.write(user + END)
 tn.read_until(b'Password: ')
 tn.write(password + END)
 tn.read_until(b'>')
 tn.write(b'password new-password="newPass" confirm-new-password="newPass" old-password="oldPass"' + END)
 tn.write(b'/snmp community' + END)
 tn.write(b'add name=comm_str addresses=741.852.963.147,123.456.789.123 read-access=yes write-access=no' + END)
 tn.write(b'..' + END)
 tn.write(b'set trap-community=comm_str' + END)
 tn.write(b'set trap-version=2' + END)
 tn.write(b'set enabled=yes' + END)
 tn.write(b'..' + END)
 tn.write(b'quit' + END)
 tn.read_all()
 print('Done for ' + host)
 except:
 print('Not exists ' + host)

فراهم کردن مجوز دسترسی SNMP در Linux در Firewall

nano /etc/firewalld/services/snmp.xml

<?xml version="1.0" encoding="utf-8"?>
<service>
 <short>SNMP</short>
 <description>SNMP protocol</description>
 <port protocol="udp" port="161"/>
</service>

firewall-cmd --reload
firewall-cmd --new-zone=special --permanent
firewall-cmd --reload
firewall-cmd --zone=special --add-source=xyz.xyz.xyz.xyz/32
firewall-cmd --zone=special --add-service snmp --permanent
firewall-cmd --reload

فعال سازی SNMP در vCenter

snmp.set --communities COMMUNITY_STR
snmp.set --targets IP_ADDRESS@PORT/COMMUNITY_STR,IP_ADDRESS@PORT/COMMUNITY_STR

snmp.set --loglevel warning
snmp.enable
snmp.get

فعال سازی SNMP برای ESXi

esxcli system snmp set --communities COMMUNITY_STRING
esxcli network firewall ruleset set --ruleset-id snmp --allowed-all false
esxcli network firewall ruleset allowedip add --ruleset-id snmp --ip-address ADDRESS_OF_COLLECTOR
esxcli network firewall ruleset set --ruleset-id snmp --enabled true
/etc/init.d/snmpd restart
esxcli system snmp set --enable true

تنظیم تعداد زیادی سوییچ به صورت خودکار

import telnetlib
for i in range(1,256):
 host = 'xyz.xyz.xyz.' + str(i)
 user = 'user'.encode('ascii')
 password = 'pass'.encode('ascii')

try:
 tn = telnetlib.Telnet(host, port=23)
 tn.read_until(b'Username: ')
 tn.write(user + b'\n')
 tn.read_until(b'Password: ')
 tn.write(password + b'\n')
 tn.write(b'conf t' + b'\n')
 tn.write(b'access-list zz permit xyz.xyz.xyz.xyz' + b'\n')
 tn.write(b'exit' + b'\n')
 tn.write(b'write memory' +b'\n')
 tn.write(b'exit' + b'\n')
 tn.read_all()
 print('Done for ' + host)
 except:
 print('Not exists ' + host)