topic Re: No network connectivity on low-security interface... in Network Security

No network connectivity on low-security interface...

remitprosupport — Mon, 11 Mar 2019 19:09:22 GMT

Hello all,

I have an ASA 5505 with several interfaces configured. One is my "outside", with a security level of 0, a "dmz", with a security level of 10, and the rest are "insides" with security levels of 100.

On every interface except that of the dmz, I can ping the gateway interface and get a response. For some reason on my DMZ interface, I can't. The goal is to get inbound FTP to work through a L2L vpn at the dmz, but at this point I can't even ping the gateway interface from a host on the dmz network.

I have a hardware link, and it doesn't matter whether I move the interface to a different switch-port or put a different host on that network.

Is there something I'm missing about how the ASA handles traffic on lower-security interfaces?

Please let me know if I need to provide more information.

Thanks!

Result of the command: "show run"

: Saved
:
ASA Version 8.2(3) 
!
hostname officefw1
enable password XXXX encrypted
passwd XXXX encrypted
names
<names>

dns-guard
!
interface Ethernet0/0
 switchport access vlan 2
!
interface Ethernet0/1
 switchport access vlan 50
!
interface Ethernet0/2
 switchport trunk allowed vlan 100,125,150,200
 switchport trunk native vlan 1
 switchport mode trunk
!
interface Ethernet0/3
 switchport access vlan 250
!
interface Ethernet0/4
 switchport access vlan 251
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
interface Vlan1
 shutdown
 nameif inside
 security-level 100
 no ip address
!
interface Vlan2
 nameif outside
 security-level 0
 ip address 68.226.79.105 255.255.255.224 
!
interface Vlan50
 nameif dmz
 security-level 10
 ip address 192.158.50.1 255.255.255.0 
!
interface Vlan100
 nameif infrastructure
 security-level 100
 ip address 192.168.100.1 255.255.255.0 
!
interface Vlan125
 nameif voip
 security-level 100
 ip address 192.168.125.1 255.255.255.0 
!
interface Vlan150
 nameif soa
 security-level 100
 ip address 192.168.150.1 255.255.255.0 
!
interface Vlan200
 nameif itdev
 security-level 100
 ip address 192.168.200.1 255.255.255.0 
!
interface Vlan250
 nameif systems
 security-level 100
 ip address 192.168.250.1 255.255.255.0 
!
interface Vlan251
 nameif management
 security-level 100
 ip address 192.168.251.1 255.255.255.0 
!
interface Vlan999
 no nameif
 no security-level
 no ip address
!
boot system disk0:/asa823-k8.bin
ftp mode passive
clock timezone CST -6
clock summer-time CDT recurring
dns domain-lookup infrastructure
dns domain-lookup voip
dns domain-lookup soa
dns domain-lookup systems
dns domain-lookup management
dns server-group DefaultDNS
 name-server <dns server>
 name-server <dns server>
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
<object groups>

access-list soa_access_in extended permit object-group WindowsShares object-group office_FS_clients object-group office_FS_servers log 
access-list soa_access_in extended permit object-group ActiveDirectoryAuth object-group office_AD_clients object-group office_AD_servers log 
access-list soa_access_in extended permit object-group NetworkPrinting object-group office_Print_clients object-group office_Print_servers 
access-list soa_access_in extended permit tcp object-group office_ITDev_WebServer_clients object-group office_ITDev_Web_servers object-group ITDev_Webserver_Ports 
access-list soa_access_in extended permit tcp object-group office_JIRA_clients object-group office_JIRA_servers eq www 
access-list soa_access_in extended permit tcp object-group office_Printer_WUI_clients object-group office_Print_servers eq www 
access-list soa_access_in extended permit tcp object-group office_Jabber_clients object-group office_Jabber_servers object-group Jabber 
access-list soa_access_in extended permit udp 192.168.150.0 255.255.255.0 object-group Outside_DNS eq domain 
access-list soa_access_in extended permit tcp 192.168.150.0 255.255.255.0 any eq www 
access-list soa_access_in extended permit tcp 192.168.150.0 255.255.255.0 any eq https 
access-list soa_access_in extended permit object-group Communicator_Ports 192.168.150.0 255.255.255.0 host server 
access-list soa_access_in extended permit udp 192.168.150.0 255.255.255.0 any eq isakmp 
access-list soa_access_in extended permit udp 192.168.150.0 255.255.255.0 any eq 4500 
access-list soa_access_in extended permit tcp host 192.168.150.14 host server eq 3389 
access-list soa_access_in extended permit tcp host 192.168.150.14 object-group DM_INLINE_NETWORK_11 
access-list outside_access_in extended permit tcp host DB101 host WWW2 object-group DM_INLINE_TCP_3 
access-list itdev_access_in extended permit object-group ActiveDirectoryAuth object-group office_AD_clients object-group office_AD_servers 
access-list itdev_access_in extended permit object-group WindowsShares object-group office_FS_clients object-group office_FS_servers 
access-list itdev_access_in extended permit object-group NetworkPrinting object-group office_Print_clients object-group office_Print_servers 
access-list itdev_access_in extended permit tcp object-group office_Jabber_clients object-group office_Jabber_servers object-group Jabber 
access-list itdev_access_in extended permit tcp object-group office_JIRA_clients object-group office_JIRA_servers eq www 
access-list itdev_access_in extended permit udp 192.168.200.0 255.255.255.0 object-group Outside_DNS eq domain 
access-list itdev_access_in extended permit tcp 192.168.200.0 255.255.255.0 any eq www 
access-list itdev_access_in extended permit tcp 192.168.200.0 255.255.255.0 any eq https 
access-list itdev_access_in extended permit object-group Communicator_Ports 192.168.200.0 255.255.255.0 host server 
access-list itdev_access_in extended permit tcp object-group DM_INLINE_NETWORK_10 object-group prod_DBServers eq sqlnet 
access-list itdev_access_in extended permit tcp object-group DM_INLINE_NETWORK_15 object-group DM_INLINE_NETWORK_8 eq ssh 
access-list itdev_access_in extended permit tcp object-group office_Developer_Workstations object-group prod_IQAServers object-group RDP 
access-list itdev_access_in extended permit tcp host Justin_PC host WWW2 object-group RDP 
access-list itdev_access_in extended permit tcp object-group office_Developer_Workstations 98.136.48.0 255.255.255.0 object-group Yahooo_Messenger 
access-list itdev_access_in extended permit icmp object-group DM_INLINE_NETWORK_9 host office_Monitor_Server echo-reply 
access-list itdev_access_in extended permit tcp 192.168.200.0 255.255.255.0 object-group Rackspace_SMTP_Servers eq smtp 
access-list systems_access_in extended permit object-group ActiveDirectoryAuth object-group office_AD_clients object-group office_AD_servers 
access-list systems_access_in extended permit object-group WindowsShares object-group office_FS_clients object-group office_FS_servers 
access-list systems_access_in extended permit object-group NetworkPrinting object-group office_Print_clients object-group office_Print_servers 
access-list systems_access_in extended permit tcp object-group office_ITDev_WebServer_clients object-group office_ITDev_Web_servers object-group ITDev_Webserver_Ports 
access-list systems_access_in extended permit tcp object-group office_Jabber_clients object-group office_Jabber_servers object-group Jabber 
access-list systems_access_in extended permit tcp object-group office_JIRA_clients object-group office_Jabber_servers eq www 
access-list systems_access_in extended permit tcp object-group office_Printer_WUI_clients object-group office_Print_servers eq www 
access-list systems_access_in extended permit tcp object-group office_SysAdmin 192.168.150.0 255.255.255.0 object-group RDP 
access-list systems_access_in extended permit tcp object-group office_SysAdmin 192.168.200.0 255.255.255.0 object-group RDP 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group office_AD_servers object-group RDP 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group office_FS_servers object-group RDP 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group office_JIRA_servers object-group RDP 
access-list systems_access_in extended permit tcp object-group office_SysAdmin 192.168.200.0 255.255.255.0 eq ssh 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host DevDB eq sqlnet 
access-list systems_access_in extended permit tcp object-group office_SysAdmin 192.168.100.0 255.255.255.0 object-group OMSA 
access-list systems_access_in extended permit tcp object-group office_SysAdmin 192.168.200.0 255.255.255.0 object-group OMSA 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host switch eq https 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host server object-group RDP 
access-list systems_access_in extended permit udp 192.168.250.0 255.255.255.0 object-group Outside_DNS eq domain 
access-list systems_access_in extended permit tcp 192.168.250.0 255.255.255.0 any eq https 
access-list systems_access_in extended permit tcp 192.168.250.0 255.255.255.0 any eq www 
access-list systems_access_in extended permit object-group Communicator_Ports 192.168.250.0 255.255.255.0 host server 
access-list systems_access_in extended permit udp 192.168.250.0 255.255.255.0 any eq isakmp 
access-list systems_access_in extended permit udp 192.168.250.0 255.255.255.0 any eq 4500 
access-list systems_access_in extended permit udp 192.168.250.0 255.255.255.0 any eq 10000 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group DM_INLINE_NETWORK_5 eq ssh 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group DM_INLINE_NETWORK_6 object-group RDP 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group DM_INLINE_NETWORK_7 object-group OMSA 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host IQ100 eq 8888 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host WEBDEV1 object-group DM_INLINE_TCP_1 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group prod_DBServers object-group OEM 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host 192.168.50.100 object-group DM_INLINE_TCP_2 
access-list systems_access_in extended permit icmp object-group office_SysAdmin 192.158.50.0 255.255.255.0 
access-list systems_access_in extended permit object-group Nagios_Office_Monitoring_Ports host office_Monitor_Server object-group DM_INLINE_NETWORK_12 
access-list systems_access_in extended permit tcp host office_Monitor_Server object-group DM_INLINE_NETWORK_13 object-group Tomcat_TCP_Ports 
access-list systems_access_in extended permit tcp object-group office_SysAdmin object-group DM_INLINE_NETWORK_16 object-group Tomcat_TCP_Ports 
access-list systems_access_in extended permit tcp 192.168.250.0 255.255.255.0 object-group SMTP_Servers eq smtp 
access-list systems_access_in extended permit tcp object-group office_SysAdmin host 192.168.0.1 eq https 
access-list infrastructure_access_in extended permit udp 192.168.100.0 255.255.255.0 object-group Outside_DNS eq domain 
access-list infrastructure_access_in extended permit icmp object-group DM_INLINE_NETWORK_14 host office_Monitor_Server echo-reply 
access-list voip_access_in extended permit udp 192.168.125.0 255.255.255.0 object-group Outside_DNS eq domain 
access-list voip_access_in extended permit tcp 192.168.125.0 255.255.255.0 any eq www 
access-list voip_access_in extended permit tcp 192.168.125.0 255.255.255.0 any eq https 
access-list voip_access_in extended permit udp 192.168.125.0 255.255.255.0 host 198.123.30.132 eq ntp 
access-list infrastructure_nat0_outbound_1 extended permit ip 192.168.100.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list infrastructure_nat0_outbound_1 extended permit ip 192.168.100.0 255.255.255.0 object-group DM_INLINE_NETWORK_18 
access-list <split tunnel acl name> standard permit 192.168.125.0 255.255.255.0 
access-list <split tunnel acl name> standard permit 192.168.100.0 255.255.255.0 
access-list <split tunnel acl name> standard permit 192.168.200.0 255.255.255.0 
access-list <split tunnel acl name> standard permit 192.168.250.0 255.255.255.0 
access-list voip_nat0_outbound extended permit ip 192.168.125.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list systems_nat0_outbound extended permit ip 192.168.250.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list systems_nat0_outbound extended permit ip 192.168.250.0 255.255.255.0 object-group DM_INLINE_NETWORK_4 
access-list infrastructure_nat0_outbound extended permit ip 192.168.100.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list infrastructure_nat0_outbound extended permit ip 192.168.100.0 255.255.255.0 object-group DM_INLINE_NETWORK_17 
access-list outside_1_cryptomap extended permit ip object-group DM_INLINE_NETWORK_1 object-group DM_INLINE_NETWORK_2 
access-list voip_nat0_outbound_1 extended permit ip 192.168.125.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list soa_nat0_outbound extended permit ip 192.168.150.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list soa_nat0_outbound extended permit ip 192.168.150.0 255.255.255.0 object-group DM_INLINE_NETWORK_3 
access-list itdev_nat0_outbound extended permit ip 192.168.200.0 255.255.255.0 192.168.101.0 255.255.255.192 
access-list itdev_nat0_outbound extended permit ip 192.168.200.0 255.255.255.0 object-group DM_INLINE_NETWORK_2  
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
mtu dmz 1500
mtu infrastructure 1500
mtu voip 1500
mtu soa 1500
mtu itdev 1500
mtu systems 1500
mtu management 1500
ip local pool <pool name> 192.168.101.1-192.168.101.50 mask 255.255.255.0
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-634-53.bin
no asdm history enable
arp timeout 14400
nat-control
global (outside) 1 interface
nat (dmz) 1 192.158.50.0 255.255.255.0
nat (infrastructure) 0 access-list infrastructure_nat0_outbound_1
nat (infrastructure) 1 192.168.100.0 255.255.255.0
nat (voip) 0 access-list voip_nat0_outbound_1
nat (voip) 1 192.168.125.0 255.255.255.0
nat (soa) 0 access-list soa_nat0_outbound
nat (soa) 1 192.168.150.0 255.255.255.0
nat (itdev) 0 access-list itdev_nat0_outbound
nat (itdev) 1 192.168.200.0 255.255.255.0 tcp 100 0 
nat (systems) 0 access-list systems_nat0_outbound
nat (systems) 1 192.168.250.0 255.255.255.0
static (voip,soa) 192.168.125.0 192.168.125.0 netmask 255.255.255.0 
static (itdev,infrastructure) 192.168.200.0 192.168.200.0 netmask 255.255.255.0 
static (itdev,voip) 192.168.200.0 192.168.200.0 netmask 255.255.255.0 
static (soa,infrastructure) 192.168.100.0 192.168.150.0 netmask 255.255.255.0 
static (infrastructure,itdev) 192.168.100.0 192.168.100.0 netmask 255.255.255.0 
static (infrastructure,systems) 192.168.100.0 192.168.100.0 netmask 255.255.255.0 
static (infrastructure,soa) 192.168.100.0 192.168.100.0 netmask 255.255.255.0 
static (itdev,systems) 192.168.200.0 192.168.200.0 netmask 255.255.255.0 
static (itdev,soa) 192.168.200.0 192.168.200.0 netmask 255.255.255.0 
static (soa,voip) 192.168.150.0 192.168.150.0 netmask 255.255.255.0 
static (soa,itdev) 192.168.150.0 192.168.150.0 netmask 255.255.255.0 
static (soa,systems) 192.168.150.0 192.168.150.0 netmask 255.255.255.0 
static (voip,itdev) 192.168.125.0 192.168.125.0 netmask 255.255.255.0 
static (voip,systems) 192.168.125.0 192.168.125.0 netmask 255.255.255.0 
static (dmz,systems) 192.158.50.0 192.158.50.0 netmask 255.255.255.0 
static (systems,infrastructure) 192.168.250.0 192.168.250.0 netmask 255.255.255.0 
static (systems,soa) 192.168.250.0 192.168.250.0 netmask 255.255.255.0 
static (systems,itdev) 192.168.250.0 192.168.250.0 netmask 255.255.255.0 
static (systems,voip) 192.168.250.0 192.168.250.0 netmask 255.255.255.0 
static (systems,dmz) 192.168.250.0 192.168.250.0 netmask 255.255.255.0  
access-group outside_access_in in interface outside
access-group dmz_access_in in interface dmz
access-group infrastructure_access_in in interface infrastructure
access-group voip_access_in in interface voip
access-group soa_access_in in interface soa
access-group itdev_access_in in interface itdev
access-group systems_access_in in interface systems
route outside 0.0.0.0 0.0.0.0 <ip address> 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 192.168.251.0 255.255.255.0 management
http 192.168.250.0 255.255.255.0 systems
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac 
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac 
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac 
crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac 
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac 
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac 
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac 
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac 
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac 
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs group1
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5
crypto map outside_map 1 match address outside_1_cryptomap
crypto map outside_map 1 set pfs 
crypto map outside_map 1 set peer 12.109.80.164 
crypto map outside_map 1 set transform-set ESP-AES-256-SHA
crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 5
 authentication pre-share
 encryption 3des
 hash sha
 group 2
 lifetime 86400
crypto isakmp policy 10
 authentication pre-share
 encryption des
 hash sha
 group 2
 lifetime 86400
crypto isakmp policy 30
 authentication pre-share
 encryption aes-256
 hash sha
 group 5
 lifetime 86400
no vpn-addr-assign aaa
no vpn-addr-assign dhcp
vpn-addr-assign local reuse-delay 5
telnet 192.168.250.0 255.255.255.0 systems
telnet timeout 5
ssh 192.168.250.0 255.255.255.0 systems
ssh timeout 5
console timeout 0
management-access management
dhcpd auto_config outside
!
dhcpd address 192.168.125.10-192.168.125.30 voip
dhcpd dns 68.15.28.11 68.105.29.12 interface voip
!
dhcpd address 192.168.150.10-192.168.150.30 soa
dhcpd dns 68.105.28.12 68.105.29.11 interface soa
dhcpd enable soa
!

threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
 anyconnect-essentials
group-policy <policy name>
group-policy <policy name> attributes
 dns-server value <dns servers>
 vpn-tunnel-protocol IPSec 
 split-tunnel-policy tunnelspecified
 split-tunnel-network-list value <split tunnel acl name>
<Users>
tunnel-group DefaultRAGroup ipsec-attributes
 pre-shared-key *****
tunnel-group <group name> type remote-access
tunnel-group <group name> general-attributes
 address-pool <pool name>
 default-group-policy <group name>
tunnel-group <group name> ipsec-attributes
 pre-shared-key *****
tunnel-group <remote IP> type ipsec-l2l
tunnel-group <remote IP> ipsec-attributes
 pre-shared-key *****
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map 
  inspect ftp 
  inspect h323 h225 
  inspect h323 ras 
  inspect rsh 
  inspect rtsp 
  inspect esmtp 
  inspect sqlnet 
  inspect skinny  
  inspect sunrpc 
  inspect xdmcp 
  inspect sip  
  inspect netbios 
  inspect tftp 
  inspect ip-options 
!
service-policy global_policy global
prompt hostname context 
call-home
 profile CiscoTAC-1
  no active
  destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
  destination address email callhome@cisco.com
  destination transport-method http
  subscribe-to-alert-group diagnostic
  subscribe-to-alert-group environment
  subscribe-to-alert-group inventory periodic monthly
  subscribe-to-alert-group configuration periodic monthly
  subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:46604574d5dd6acba3b8e879f7b92d73
: end

Re: No network connectivity on low-security interface...

Maykol Rojas — Mon, 15 Nov 2010 01:35:38 GMT

Hello Daniel,

When you say you cannot ping the gateway you mean you cannot ping 192.158.50.1 255.255.255.0? By default, you should be able to ping it. Can you check if you can ping the host from the firewall? If you do a show arp, can you see the DMZ host listed? Is there any kind of firewall enabled on that machine on the DMZ?

Let us know.

Mike

Re: No network connectivity on low-security interface...

Jennifer Halim — Mon, 15 Nov 2010 01:38:12 GMT

Your DMZ is assigned VLAN 50, and currently base on the configuration, you can:

1) Connect to ASA ethernet 0/1 directly, and give it IP address in the same subnet as VLAN 50 - 192.168.50.0/24, and you should be able to ping the DMZ interface 192.168.50.1

OR/

2) Currently ASA ethernet 0/2 is a trunk port, however, it's not allowing VLAN 50. If you are connecting your PC to switch port in VLAN 50, and trunk the switch to the ASA, then you would need to allow VLAN 50 to be trunked through on the ASA.

Re: No network connectivity on low-security interface...

remitprosupport — Mon, 15 Nov 2010 01:54:22 GMT

Thanks for the reply Mike...

The host in the DMZ has a statically assigned IP of 192.168.50.100, netmask 255.255.255.0. I cannot ping the gateway (192.168.50.1) from the host and the firewall cannot ping the host either.

Strangely, when I run "show arp", there's no entry for 192.168.50.100, but one for 169.254.12.98, which I think is the IP address windows automatically assigns when an interface can't get an IP from a DHCP server. That shouldn't have come from the host in the DMZ though, because it's always had a statically assigned IP...

Re: No network connectivity on low-security interface...

remitprosupport — Mon, 15 Nov 2010 01:56:35 GMT

Thanks Jennifer...

The device is connected directly to the firewall port (0/1), and not on a switch port that uses the trunk. I did also try assigning the DMZ interface to a switchport that would use the trunk, and it made no difference. I've also placed a hub in between the host and the firewall port, also with no effect.

Re: No network connectivity on low-security interface...

Jennifer Halim — Mon, 15 Nov 2010 02:01:00 GMT

You mention earlier that when you perform show arp, you were seeing entry for 169.254.12.98, is the MAC address for the 169.254.12.98 ARP entry the same as your PC MAC address? If it is, you should perform "clear arp" on the ASA.

Re: No network connectivity on low-security interface...

Maykol Rojas — Mon, 15 Nov 2010 02:21:52 GMT

Hello Daniel,

Jennifer is right, if you have the host directly connected with an IP address statically assign, try to clear the ARP and try to ping the host again.

Let us know the results.

Mike

Re: No network connectivity on low-security interface...

remitprosupport — Mon, 15 Nov 2010 02:34:21 GMT

Thanks both for the replies. After clearing the arp cache on the firewall, I still can't ping. The mystery arp entry hasn't returned, but I did confirm that the mac from the mystery entr does not match either nic on the dmz host.

I also tried switching over to the other nic with a different IP on the same network, and still no luck. Also, there are no new arp entries for the dmz network.

If you have any more ideas, they're greatly appreciated.

Re: No network connectivity on low-security interface...

Jennifer Halim — Mon, 15 Nov 2010 02:36:26 GMT

Maybe cable issue? and have you also tried a different host? or even tried different IP Address? and just confirming that the netmask is 255.255.255.0?

Re: No network connectivity on low-security interface...

remitprosupport — Mon, 15 Nov 2010 02:44:51 GMT

I've tried different cables and giving the existing host a different IP, with no luck. I've moved this host to another network and it magically works again.

I've added a different host to the dmz and it also cannot ping. I've also moved the dmz to a different switchport on the firewall, also with no luck. I've verified the netmask on both the host and the firewall. Here's an interface detail for the dmz interface:


Interface Vlan50 "dmz", is up, line protocol is up
  Hardware is EtherSVI, BW 100 Mbps, DLY 100 usec
    MAC address d0d0.fd45.64fa, MTU 1500
    IP address 192.158.50.1, subnet mask 255.255.255.0
  Traffic Statistics for "dmz":
    4837 packets input, 452091 bytes
    13 packets output, 448 bytes
    3009 packets dropped
      1 minute input rate 0 pkts/sec,  0 bytes/sec
      1 minute output rate 0 pkts/sec,  0 bytes/sec
      1 minute drop rate, 0 pkts/sec
      5 minute input rate 0 pkts/sec,  8 bytes/sec
      5 minute output rate 0 pkts/sec,  0 bytes/sec
      5 minute drop rate, 0 pkts/sec

Re: No network connectivity on low-security interface...

remitprosupport — Mon, 15 Nov 2010 02:54:33 GMT

Well guys, I have to say the problems been staring me in the face and I just now noticed it. And of the dozens of times I checked the interface config I didn't see it.

You'll notice that the IP address I have configured is 192.158.50.1, and it should be 192.168.50.1.

Sorry for the time spent working with me on this. I really do appreciate your help.

Thanks,

Dan

Re: No network connectivity on low-security interface...

Jennifer Halim — Mon, 15 Nov 2010 02:54:35 GMT

Weird.. looks like lots of packets are dropped.

Try to test with packet tracer and see where it says it's failing, and last resort, try to reload the ASA.

Re: No network connectivity on low-security interface...

Jennifer Halim — Mon, 15 Nov 2010 02:57:27 GMT

Ooopss, the famous typo, I should have noticed too earlier

Re: No network connectivity on low-security interface...

Maykol Rojas — Mon, 15 Nov 2010 02:57:28 GMT

Hello Daniel,

LOL, those kind of things happen, dont worry, we are here to help, would you mark this topic as solved?

Cheers.

Mike

Re: No network connectivity on low-security interface...

remitprosupport — Mon, 15 Nov 2010 02:59:27 GMT

Done, and thanks to both of you...