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Troubleshooting Guide

ManualsBrandsCisco Manualshardware firewallsCisco ASA 5525-X Adaptive Security Appliance - No Payload Encryption
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IPS after performing NAT.
IPS# packet display PortChannel0/0
Warning: This command will cause significant performance degradation
tcpdump: WARNING: po0_0: no IPv4 address assigned
tcpdump: verbose output suppressed, use −v or −vv for full protocol decode
listening on po0_0, link−type EN10MB (Ethernet), capture size 65535 bytes
03:40:06.239024 IP 203.0.113.10 > 192.168.1.10: ICMP echo request, id 512, seq
31232, length 40
03:40:06.239117 IP 203.0.113.10 > 192.168.1.10: ICMP echo request, id 512, seq
31232, length 40
03:40:06.239903 IP 203.0.113.2 > 203.0.113.10: ICMP echo reply, id 512, seq
31232, length 40
03:40:06.239946 IP 203.0.113.2 > 203.0.113.10: ICMP echo reply, id 512, seq
31232, length 40
Here are the event logs on IPS for ICMP Request packets from the attacker.
evIdsAlert: eventId=6821490063343 vendor=Cisco severity=informational
originator:
hostId: IPS
appName: sensorApp
appInstanceId: 1305
time: Dec 24, 2014 03:43:57 UTC offset=0 timeZone=UTC
signature: description=ICMP Echo Request id=2004 version=S666 type=other
created=20001127
subsigId: 0
sigDetails: ICMP Echo Request
interfaceGroup: vs0
vlan: 0
participants:
attacker:
addr: 203.0.113.10 locality=OUT
target:
addr: 192.168.1.10 locality=OUT
os: idSource=unknown type=unknown relevance=relevant
alertDetails: InterfaceAttributes: context="single_vf" physical="Unknown"
backplane="PortChannel0/0" ;
riskRatingValue: 35 targetValueRating=medium attackRelevanceRating=relevant
threatRatingValue: 35
interface: PortChannel0/0 context=single_vf physical=Unknown backplane=
PortChannel0/0
protocol: icmp
Here are the event logs on IPS for ICMP Reply from the inside server.
evIdsAlert: eventId=6821490063344 vendor=Cisco severity=informational
originator:
hostId: IPS
appName: sensorApp
appInstanceId: 1305
time: Dec 24, 2014 03:43:57 UTC offset=0 timeZone=UTC
signature: description=ICMP Echo Reply id=2000 version=S666 type=other
created=20001127
subsigId: 0
sigDetails: ICMP Echo Reply
interfaceGroup: vs0
vlan: 0
participants:
attacker:
addr: 192.168.1.10 locality=OUT
target:
addr: 203.0.113.10 locality=OUT