Windows 8 and 8.1 Forums


Do I need to block 127.0.0.1 in firewall..

  1. #1


    Posts : 209
    Windows 8.1 (HOME not Pro) 64bit

    Do I need to block 127.0.0.1 in firewall..


    some applications like Itunes for windows are connecting to 127.0.0.1.. i just think i'm going to block it.. i guess its a loopback but i dont care. what does itunes need it for.. you know.

    i've been doing tweaking just blocking my entire computer and seeing what is the extreme bare minimum to connect to the internet..

    so far i've block all svchost.exe except for port 54 53 i believe as I seem to not be able to connect if i disable that..




    some outbound and inbound below..
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    Click image for larger version


    merry christmas

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  2. #2


    Trnava
    Posts : 683
    Win 8.1.1 Pro x64


    Well, loopback is basically a computer talking to itself, so no need to block it.

    IP Loopback Address 127.0.0.1

    Quote Originally Posted by bassfacer22 View Post
    so far i've block all svchost.exe except for port 54 53 i believe as I seem to not be able to connect if i disable that..
    53 is used for DNS requests. If you disable DNSCache service, you can block svchost entirely.
    But before that, you have to set up DNS servers manually or your networking will not work.
    If you have blocked svchost's TCP Out 80/443, I believe, that windows updates will fail.
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  3. #3


    Posts : 209
    Windows 8.1 (HOME not Pro) 64bit


    Quote Originally Posted by TairikuOkami View Post
    Well, loopback is basically a computer talking to itself, so no need to block it.

    IP Loopback Address 127.0.0.1

    Quote Originally Posted by bassfacer22 View Post
    so far i've block all svchost.exe except for port 54 53 i believe as I seem to not be able to connect if i disable that..
    53 is used for DNS requests. If you disable DNSCache service, you can block svchost entirely.
    But before that, you have to set up DNS servers manually or your networking will not work.
    If you have blocked svchost's TCP Out 80/443, I believe, that windows updates will fail.

    yes, I have started to research all that.. I may do that.. but i haven't really seen a good reason to yet.. is it simply to be more secure so virus/malware can't use svchost.exe? is that why you would completely block it?

    I may do the dns server thing.. but yea i have to open 80,443 whenever i try to windows update.. but that i can do when i want to update windows..

    i see a lot of activity though with my firewall.. that does seem odd.. and i do know some about the loopback.. but you know, i kinda just don't want my computer talking to itself.. that just sounds as crazy as a crazy person talking to himself on the street..

    i have a lot of these kind of addresses in my firewall too.. any experience about these? I'm guessing ipv6 or something..

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  4. #4


    Trnava
    Posts : 683
    Win 8.1.1 Pro x64


    DHCPv6 - Wikipedia, the free encyclopedia

    It seems like DHCP requesting IP from your router. When you set up you IP manually, it will be gone too.

    Quote Originally Posted by bassfacer22 View Post
    yes, I have started to research all that.. I may do that.. but i haven't really seen a good reason to yet.. is it simply to be more secure so virus/malware can't use svchost.exe? is that why you would completely block it?
    Yes, it could be used by malware, like DNS poisoning changing DNS cache or DNS hijacking.
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  5. #5


    Posts : 209
    Windows 8.1 (HOME not Pro) 64bit


    Yes, it could be used by malware, like DNS poisoning changing DNS cache or DNS hijacking.
    -So would disabling DNS be the answer to this? sounds like i will have to start looking up how to disable dns and put it in my advanced network adapter settings probably..

    -also sounds like i have to somehow with an AT&T crappy 3800 HGV-B router, try to setup static ip address from what you are saying as well..
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  6. #6


    Trnava
    Posts : 683
    Win 8.1.1 Pro x64


    Set up your router like this (just guessing, you need to verify, not sure about IP range)

    Configure manually
    Router Address: 10.10.10.10.
    Subnet Mask: 255.255.255.0.
    Do not enable DHCP.

    Go to Windows settings (link) and setup up like on the screenshot bellow.

    I can not seem to find IPv6 settings on your router, though it supports it.
    But you do not really need IPv6, unless you need its specific functions.

    Start - Run - services.msc - find DNSClient service - set it to Disabled.
    Though at first you might just stop it to see, if it works properly.

    If anything goes wrong, just go back to previous settings.
    Attached Thumbnails Attached Thumbnails capture_12292014_114307.jpg   capture_12292014_114343.jpg  
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Do I need to block 127.0.0.1 in firewall..
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