Can't connect to wireless networks without disabling firewall.

I just had the built-in battery replaced on my MBP by the genius bar. When I started the machine up I was bombarded with firewall messages asking if applications should be given access to incoming network connections. I didn't recognize a few of them and clicked "deny". Now my machine will no longer connect to a wireless network without first disabling the firewall. Then I can re-enable the firewall and it seems to work okay.
I went through the Security panel and edited the list of applications allowed to have incoming connections and enabled all the ones that were disabled hoping that would fix it. The only one that is disabled now is OSXVNC, which I don't use and don't want to be enabled.
I'm not sure why replacing the battery caused all the windows to pop up, but now I don't know how to fix this issue. Anyone have any advice? Is there a way to restore my old firewall settings?

Go to the /Macintosh HD/Library/Preferences/ folder and remove the file called "com.apple.alf.plist", then restart your system.
This file is the preferences file for the application firewall. Removing it will clear all the firewall rules and set up the firewall from scratch. Sometimes after hardware configuration changes, or even hard crashes the firewall may not work properly and removing this file to set it up from scratch should do the trick. It will still ask you to allow some services and applications after doing this, but should not ask to for every system service and feature that uses the network.

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  • [SOLVED]I can't connect to wireless networks.

    Hi all, i'm new in the world of Arch Linux but not on the Linux world.
    I'm having problems with wireless networks, and i had read all what the wiki says and tried all but nothing worked. I wanna say that wired works perfect.
    I think the problem comes from dhcpcd. Because in the begins the problem was that dhcpcd stuck on "Waiting for carrier", i read the wiki and seted the channel on auto but didnt work. Now i cant even connect to a wireless red.
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    dhcpcd.service enabled
    [email protected] enabled
    [email protected] enabled
    [email protected] disabled
    netctl-sleep.service disabled
    netctl.service disabled
    [email protected] static
    netctl@wlp2s0\x2dCandy.service enabled
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    NetworkManager-wait-online.service disabled
    NetworkManager.service enabled
    nscd.service disabled
    [email protected] disabled
    [email protected] disabled
    wpa_supplicant.service disabled
    [email protected] disabled
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    UNIT LOAD ACTIVE SUB DESCRIPTION
    dhcpcd.service loaded failed failed dhcpcd on all interfaces
    [email protected] loaded failed failed dhcpcd on enp7s0
    [email protected] loaded failed failed dhcpcd on wlp2s0
    [email protected] loaded failed failed Automatic wireless network co
    [email protected]\x206283.service loaded failed failed Networking for netctl profile
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    link/ether 74:f0:6d:3d:ee:f4 brd ff:ff:ff:ff:ff:ff
    What aditional info do u need?
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    Last edited by Niemand (2013-10-13 18:03:45)

    ewaller wrote:Niemand,
    Yes that is what I was working toward. 
    I am worried about one thing, however.  I note that you are using an Android phone as your AP.  Have you done that successfully with other machines?  The reason I ask is some carriers here in the states (*cough*Verizon*cough*) make it as difficult as possible to tether their phones.  I know that on my phone, I had to turn on NAT forwarding in the phone to make it work.  That required I root the phone.
    Yes it works perfect with anothers PCs and with this PC on Windows too. I tried on anothers Networks, D-Link Router, Micronet and others. I tried in a lot of connections but it doesn't work.
    DarkCerberus wrote:You should try it with just NetworkManager.service or just netctl.service without the @ symbol - with my knowledge - dhcpcd, netctl and NetworkManager all conflicts together, try disabling the other network services like dhcpcd, netctl, NetworkManager etc. And just use one of them and see what the end result is.
    I could't disable the following services:
    [email protected]
    [email protected]
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    - sudo systemctl disable [email protected]
    - sudo netctl-auto disable-all
    Then, i restarted and try again with:
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    version 6.0.5 starting
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    wlan0: soliciting a DHCP lease
    wlan0: offered 192.168.43.17 from 192.168.43.1
    wlan0: leased 192.168.43.17 for 43200 seconds
    wlan0: adding host route to 192.168.43.17 via 127.0.0.1
    wlan0: adding route to 192.168.43.0/24
    wlan0: adding default route via 192.168.43.1
    forked to background, child pid 700
    IT'S WORKS!!
    The status of the services are:
    $ systemctl list-unit-files
    dhcpcd.service disabled
    [email protected] enabled
    [email protected] enabled
    [email protected] disabled
    netctl-sleep.service disabled
    netctl.service disabled
    [email protected] static
    netctl@wlp2s0\x2dCandy.service disabled
    NetworkManager-dispatcher.service disabled
    NetworkManager-wait-online.service disabled
    NetworkManager.service disabled
    nscd.service disabled
    [email protected] disabled
    [email protected] disabled
    wpa_supplicant.service disabled
    [email protected] disabled
    Now my ip link is:
    $ ip link
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT qlen 1000
    link/ether 70:71:bc:92:00:1f brd ff:ff:ff:ff:ff:ff
    3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000
    link/ether 74:f0:6d:3d:ee:f4 brd ff:ff:ff:ff:ff:ff
    And my iwconfig:
    $ iwconfig
    eth0 no wireless extensions.
    lo no wireless extensions.
    wlan0 IEEE 802.11bgn ESSID:"MOTOROLA RAZR i 6283"
    Mode:Managed Frequency:2.437 GHz Access Point: E0:75:7D:D0:56:98
    Bit Rate=72.2 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:off Fragment thr:off
    Power Management:off
    Link Quality=70/70 Signal level=-35 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:1 Invalid misc:22 Missed beacon:0
    In the begins i didnt have Ethernet but then i turn on manually eth0 and boths works perfect.
    Thanks a lot for all.
    [SOLVED]

  • [S0LVED] Can't connect to wireless network...

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    Last edited by rzrscm (2013-10-22 11:59:06)

    /dev/zero wrote:
    With more information, I can now say that I can't help you with everything - but I will respond to what I can.
    rzrscm wrote:
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    rzrscm wrote:
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