Double computer name on network and NAT issue with Back to My Mac
These are the problems I am having:
When my MacPro workstation (which on the network is named "The Beast") wakes from sleep - I get a message saying "there is already a computer on the network with the name "The Beast". Other computers on the network can now find you at "The Beast-2"" and it gives me a new name in the file sharing preferences - even though it is the only computer on the network with that name.
Why is this happening???
The other problem is with BackTo My Mac - When I try to enable it - I get an error message saying "Turn off NAT Addressing" - which I thought was turned off since the AEBS is in Bridge Mode. Why is this happening?
Here is my network setup which consists of the Modem / Router from my ISP - an Airport Extreme Base Station and one Airport Express - which is connected to my MacPro via ethernet. The MacPro does not have an airport card installed and is running OSX 10.6.8 - all other computers / devices are running 10.7.x and iOS6).
VDSL Modem / Router (from Internet provider) with wireless turned off - (so it is not broadcasting a competing wireless signal) - connected via ethernet to my Airport Extreme Base Station.
Here are all the settings on the AEBS and the Airport Express: - I am using Airport Utility 5.6.1 on my Mac Pro running OSX 10.6.8 - so the setup prefs are different than the newer version of Airport Utility found on 10.7.x systems - but both work fine. Although I did notice that the option to allow ethernet clients to connect to the Airport Express does not exist (or I just didn't find it) in the newer version of Airport Utility.
Airport Extreme Base Station is set up as follows:
Wireless Mode: Create a Wireless Network
Wireless Settings:
Allow this network to be extended IS CHECKED
Radio Mode: 802.11n (b and g compatible)
Wireless Security: WPA/WPA2 Personal
Access Control:
MAC Address Access Control: Not Enabled
Internet Settings:
Internet Connection:
Connect Using: Ethernet
Connection Sharing: OFF (Bridge Mode).
TCP/IP:
Configure IPv4: Using DHCP
Advanced Settings:
Logging & Statistics:
Syslog Destination Address is blank (as in nothing appears in this field).
Syslog Level: 5 - Notice
Allow SNMP is CHECKED
MobileMe:
Back to my Mac is turned off - but if I try to turn it on I get an error message saying "Turn off NAT Addressing - which I thought was turned off since the AEBS is in Bridge Mode. Why is this happening?
IPv6:
IPv6 Mode: Link-local only
As stated - my MacPro with no wifi card - is connected via ethernet to an Airport Express which connects wirelessly to the AEBS for network and internet access.
Airport Express Settings:
Airport Settings:
Wireless Mode: Join a Wireless Network
Allow Ethernet Clients IS CHECKED
Wireless Security WPA/WPA2 Personal
Internet Settings: Are grayed out (as in I can't change these settings - I assume because they are being controlled by the AEBS) and read as follows:
Connect Using: Wireless Network
Connection Sharing: OFF (Bridge Mode)
TCP/IP:
Configure IPv4: using DHCP
All other settings are identical to the AEBS.
All other WiFi devices in the house (MacBook Pro, iPhones, iPad's, iMac, Apple TV, Nintendo Wii etc…all are able to connect to the network and connect to the internet - no problem.
Thanks for any insights into what might be causing the double name on the network and why it is asking me to turn off NAT addressing - when both my Airport devices are in Bridge Mode?
I am also having this issue... any updates on this??
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ASA 5505 9.1 and NAT issues to single dynamic IP
Good afternoon everybody,
a few days ago I tried setting up my ASA 5505 to allow access from the outside network to an Exchange server (ports HTTPS and SMTP) in my inside LAN.
Everything seems to be working... until my outside IP address changes (for example due to a router reset or a disconnection caused by the ISP).
As soon as the outside address changes the NAT rules are deleted and these 2 lines pop up in the syslog :
<166>%ASA-6-305012: Teardown static TCP translation from inside:192.168.1.150/25 to outside:79.6.105.13/25 duration 0:01:17.
<166>%ASA-6-305012: Teardown static TCP translation from inside:192.168.1.150/443 to outside:79.6.105.13/443 duration 0:01:17.
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Asa5505# ERROR: NAT unable to reserve ports.
ERROR: NAT unable to reserve ports.
I have moved both Anyconnect VPN essentials and http ports to 10443 and 8080 respectively so port 443 should be free for nat.
This is the configuration file, I have marked the lines related to network objects and relative nat statements, I hope it helps to find out where's the problem.
Obviously the lines in red are the ones disappearing... I'm quite desperate, actually.
ASA Version 9.1(5)
hostname Asa5505
domain-name home
enable password XXXXXX encrypted
names
interface Ethernet0/0
description ADSLPPoE
switchport access vlan 2
interface Ethernet0/1
description Internal_LAN
interface Ethernet0/2
description Management_Net
switchport access vlan 3
interface Ethernet0/3
shutdown
interface Ethernet0/4
shutdown
interface Ethernet0/5
description Uplink
switchport trunk allowed vlan 1,3
switchport trunk native vlan 1
switchport mode trunk
interface Ethernet0/6
description Wireless-POE
switchport trunk allowed vlan 1,3
switchport trunk native vlan 1
switchport mode trunk
interface Ethernet0/7
description Webcam-POE
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.250 255.255.255.0
interface Vlan2
nameif outside
security-level 0
pppoe client vpdn group AliceADSL
ip address pppoe setroute
interface Vlan3
no forward interface Vlan1
nameif management
security-level 100
ip address 10.5.1.250 255.255.255.0
ftp mode passive
clock timezone CEST 1
clock summer-time CEDT recurring last Sun Mar 2:00 last Sun Oct 3:00
dns domain-lookup inside
dns domain-lookup outside
dns server-group DefaultDNS
name-server 192.168.1.4
domain-name home
object network Exchange-HTTPS
host 192.168.1.150
object network Exchange-SMTP
host 192.168.1.150
object network Network_Inside
subnet 192.168.1.0 255.255.255.0
object network Network_Management
subnet 10.5.1.0 255.255.255.0
access-list Outside_ACL extended permit tcp any object Exchange-HTTPS eq https
access-list Outside_ACL extended permit tcp any object Exchange-SMTP eq smtp
pager lines 24
logging enable
logging asdm warnings
mtu inside 1500
mtu outside 1492
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
object network Exchange-HTTPS
nat (inside,outside) static interface service tcp https https
object network Exchange-SMTP
nat (inside,outside) static interface service tcp smtp smtp
object network Network_Inside
nat (inside,outside) dynamic interface
object network Network_Management
nat (management,outside) dynamic interface
access-group Outside_ACL in interface outside
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
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
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable 8080
http 10.5.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
ssh stricthostkeycheck
ssh timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0
management-access management
vpdn group AliceADSL request dialout pppoe
vpdn group AliceADSL localname aliceadsl
vpdn group AliceADSL ppp authentication pap
vpdn username aliceadsl password ***** store-local
dhcpd address 192.168.1.100-192.168.1.130 inside
dhcpd dns 192.168.1.4 192.168.1.150 interface inside
dhcpd wins 192.168.1.4 interface inside
dhcpd enable inside
dhcpd address 10.5.1.30-10.5.1.40 management
dhcpd dns 208.67.222.222 208.67.220.220 interface management
dhcpd enable management
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
port 10443
anyconnect-essentials
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
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 ip-options
inspect netbios
inspect rsh
inspect rtsp
inspect skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect tftp
inspect sip
inspect xdmcp
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
call-home
profile CiscoTAC-1
no active
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email [email protected]
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:XXXXXXXX
: end
no asdm history enable
Thanks in advance for your precious help !
C.Update 29th of June :
Tried both suggestions: flashing to 9.22 didn't fix the problem. The only significant change between 9.1(5) and 9.2(2) is that as soon as I reload the configuration after a connection drop both nat rules are restored. In 9.1(5) the nat statements were removed from the runnning configuration when the PPPoE connection was lost, and the config was updated (or maybe saved?), so after a reload those statements were gone and I had to copy-paste them back in conf-t in order to restore them.
I tried using show xlate both before, during, and after the connection drop. As expected before the disconnection of PPPoE the static PAT rules are there, and the dynamic ones as well. During disconnection, all the xlate table is clean empty and the aforementioned error "Asa5505# ERROR: NAT unable to reserve ports. ERROR: NAT unable to reserve ports." pops up in the terminal. After a few minutes (needed by the DSL modem to perform its reset and bring up the DSL line again) the connection is established once more, but the only rules appearing in xlate are the ones created by the dynamic statements for management and LAN. If i reload the ASA using reload noconfirm every rule is restored and everything works again.
Two brief questions :
1) in my NAT statements for PAT, does it change anything if I modify them (for example) from
nat (inside,outside) static interface service tcp https https
to
nat (inside,outside) dynamic interface service tcp https https
? Since it seems like the dynamic PAT is restored after a connection drop I was asking myself what happens if I change the rules this way.
2) if there's not any ohter way to fix this, is it possible to schedule a reload of the ASA as soon as the PPPoE connection drops in order to make this problem "self fixing" ? I can't predict how many times a day the line drops and I can't be there 24/7 with my consolle cable connected in order to restore the nat statements ^^
Thank you for your precious help and patience !
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AE and Computer- Audio dropping out and stuttering issues
Hi all,
I recently bought an Airport Express 2 weeks ago. I hooked the unit up in my bedroom via ethernet(roaming) method. I use Airplay and turn on Computer and Airport Express to play both in my living room and my bedroom at the same time. Problem is I'm noticing my iTunes in my living room exhibits some stuttering during songs or the audio will start to drop out intermittently and sometimes shuts off completely but the Airport Express is still playing in my bedroom without issue. I've tried turing off the wireless but it doesn't do anything. When I turn off AE in Airplay and just play using the Computer it works fine. I'm not sure what can be causing the interference but it seems its between my computer and AE when they are both turned on. I would appreciate any suggestions forum members have to help me resolve this issue. I have the 2nd generation AE. Thanks a lot.
MactheminiHi Macthemini,
Thanks for using the Apple Support Communities. It sounds like you are experiencing issues with AirPlay between iTunes on a Mac mini and your AirPort Express. The following resource outlines troubleshooting issues for AirPlay performance:
iTunes: Troubleshooting AirPlay and AirPlay Mirroring - Apple Support
http://support.apple.com/en-us/HT203822
Troubleshooting performance issues
Wi-Fi Connection
If you are experiencing intermittent playback or significant network lag with AirPlay, it could be due to a weak Wi-Fi connection, interference, or the distance between the Wi-Fi router and your AirPlay-enabled device.
Ensure that other devices aren't trying to stream to the same Apple TV at the same time.
Ensure that your Wi-Fi router is set up with the recommended settings for the best performance.
Certain external devices, such as microwave ovens and baby monitors, may interfere with a Wi-Fi network. Try moving or disabling these devices.
If your wireless and wired networks are the same, try connecting your Apple TV to the router via Ethernet instead of Wi-Fi.
Use the Wi-Fi network troubleshooting guide to resolve interference and other issues.
- Matt M.
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