SNMP closed state in CentOS
- by anksoWX
I'm having a problem here, I've added to my IPtables rules this:
-A INPUT -p tcp -m state --state NEW -m tcp --dport 161 -j ACCEPT
-A INPUT -p udp -m state --state NEW -m udp --dport 161 -j ACCEPT
but when I scan with nmap or any other tool it says this:
Not shown: 998 filtered ports
PORT STATE SERVICE
22/tcp open ssh
161/tcp closed snmp
also when I am doing:
netstat -apn | grep snmpd
tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN 3669/snmpd<br>
udp 0 0 0.0.0.0:161 0.0.0.0:* 3669/snmpd<br>
unix 2 [ ] DGRAM 226186 3669/snmpd
Also:
service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:161
5 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:161
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
7 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
Any idea what's going on? There is no UDP in closed/open state. what do I have to do?
