小弟是个新手，问个snmp的问题，请dx解答。

ns208

我在as4上安装snmp服务，netstat -ln也看到开启了161端口，防火墙我也对外开放了udp 161端口，但是连我自己都不能抓到数据，请dx解答。
我抓127.0.0.1可以抓到数据，但是我要把127.0.0.1改成网卡上的ip地址，就提示snmpwalk -c public -v 2c 192.168.0.1 if
Timeout: No Response from 192.168.0.1。
snmpwalk -c public -v 2c 127.0.0.1 if
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
IF-MIB::ifIndex.3 = INTEGER: 3
IF-MIB::ifIndex.4 = INTEGER: 4
IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: eth0
IF-MIB::ifDescr.3 = STRING: eth1
IF-MIB::ifDescr.4 = STRING: sit0
IF-MIB::ifType.1 = INTEGER: softwareLoopback(24)
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.4 = INTEGER: tunnel(131)
IF-MIB::ifMtu.1 = INTEGER: 16436
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifMtu.3 = INTEGER: 1500
IF-MIB::ifMtu.4 = INTEGER: 1480
IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 10000000
IF-MIB::ifSpeed.3 = Gauge32: 100000000
IF-MIB::ifSpeed.4 = Gauge32: 0
IF-MIB::ifPhysAddress.1 = STRING:
IF-MIB::ifPhysAddress.2 = STRING: 0:f:ea:0:72:65
IF-MIB::ifPhysAddress.3 = STRING: 0:50:ba:9:49:1
IF-MIB::ifPhysAddress.4 = STRING:
IF-MIB::ifAdminStatus.1 = INTEGER: up(1)
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifAdminStatus.3 = INTEGER: up(1)
IF-MIB::ifAdminStatus.4 = INTEGER: down(2)
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.3 = INTEGER: up(1)
IF-MIB::ifOperStatus.4 = INTEGER: down(2)
IF-MIB::ifInOctets.1 = Counter32: 124731
IF-MIB::ifInOctets.2 = Counter32: 25822579
IF-MIB::ifInOctets.3 = Counter32: 447645920
IF-MIB::ifInOctets.4 = Counter32: 0
IF-MIB::ifInUcastPkts.1 = Counter32: 1317
IF-MIB::ifInUcastPkts.2 = Counter32: 123617
IF-MIB::ifInUcastPkts.3 = Counter32: 4930528
IF-MIB::ifInUcastPkts.4 = Counter32: 0
IF-MIB::ifInDiscards.1 = Counter32: 0
IF-MIB::ifInDiscards.2 = Counter32: 0
IF-MIB::ifInDiscards.3 = Counter32: 0
IF-MIB::ifInDiscards.4 = Counter32: 0
IF-MIB::ifInErrors.1 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
IF-MIB::ifInErrors.3 = Counter32: 0
IF-MIB::ifInErrors.4 = Counter32: 0
IF-MIB::ifOutOctets.1 = Counter32: 127096
IF-MIB::ifOutOctets.2 = Counter32: 4324353
IF-MIB::ifOutOctets.3 = Counter32: 18291727
IF-MIB::ifOutOctets.4 = Counter32: 0
IF-MIB::ifOutUcastPkts.1 = Counter32: 1349
IF-MIB::ifOutUcastPkts.2 = Counter32: 37747
IF-MIB::ifOutUcastPkts.3 = Counter32: 39322
IF-MIB::ifOutUcastPkts.4 = Counter32: 0
IF-MIB::ifOutDiscards.1 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
IF-MIB::ifOutDiscards.3 = Counter32: 0
IF-MIB::ifOutDiscards.4 = Counter32: 0
IF-MIB::ifOutErrors.1 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
IF-MIB::ifOutErrors.3 = Counter32: 0
IF-MIB::ifOutErrors.4 = Counter32: 0
IF-MIB::ifOutQLen.1 = Gauge32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0
IF-MIB::ifOutQLen.3 = Gauge32: 0
IF-MIB::ifOutQLen.4 = Gauge32: 0
IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.4 = OID: SNMPv2-SMI::zeroDotZero

alvis

netstat -nap|grep 161

iptables L -n

9er

iptables