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What's the possible reason for an ISP to block an IP?
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What's the possible reason for an ISP to block an IP?

I just bought a VPS with fresh installed system. Unfortunately I cannot SSH into my VPS. I was almost going to submit a support ticket. But when I tried to login from another VPS, it went through without any problem.

When I type the IP address in browser on my cell phone (I turned off the WiFi and connect through 4G), the default Apache page shows up. But it does not even respond the ping from my laptop.

So it seems my home ISP blocked the IP address for some reasons. I checked online and it turned out this IP is not in any of the black list. What's the possible reason for my ISP to block this IP?

Comments

  • Does your ISP censor the nets?

  • BoxodeBoxode Member

    Do you have any security system on your PC? Any firewall(s)?

    Have you tried from another PC?

  • I don't think ISP in U.S. will censor the net solely by an IP address (no any website on this new VPS yet)

    I can connect to my other VPS's from my home without any problem. And I can login this VPS through my other VPS's, just cannot SSH into it directly. This is the first time I have problem pinging a VPS from my home network.

  • What you be usin'? Comcast? Verizon FiOS? AT&T or Cox? TWC...

  • PwnerPwner Member

    @eddynetweb said:
    What you be usin'? Comcast? Verizon FiOS? AT&T or Cox? TWC...

    I know AT&T has a history with me on blocking some of the shared cPanel hosting sites I used to use. I used that a free one for trial testing (3owl, 4ove, Fav, Usr, all cobranded under YouHosting) after a while, AT&T just went out of their way and blocked all these hosts for me and made my life that much harder. They were crappy on their promised bandwidth, but the service overall wasn't as bad when it came to just beta testing several sites for free.

  • mikhomikho Member, Host Rep

    Do a traceroute to the vps ip from home and see where it stops.

    My home IP was once blocked by the Node itself, so I couldn't connect tomtje vps.
    Nothing tondo with the ISP, this was a provider thing.

  • wychwych Member

    I also have encountered a similar issue to MikHo where my IP was in a banned range on a node and thus no connectivity to it.

    If you have a Dynamic IP based connection you may want to just reboot the router and get a new IP and see if that solves it.

  • mikhomikho Member, Host Rep

    @wych said:

    If you have a Dynamic IP based connection you may want to just reboot the router and get a new IP and see if that solves it.

    The router does bot always get a new IP every time it reboots. You need to have it turned off for a couple of hours. The amount of hours differs between ISPs.

    Traceroute the ip and if it stops on the host node (last hop) then it is probably your provider.
    If it stops after 1-2 hops after your router, it is your ISP.

  • wychwych Member

    @MikHo said:
    The router does bot always get a new IP every time it reboots.

    Oh yeah, my ISP does it after a re-connection so just disconnecting and reconnecting push a new IP, I forget some don't.

  • mikhomikho Member, Host Rep

    @wych said:
    Oh yeah, my ISP does it after a re-connection so just disconnecting and reconnecting push a new IP, I forget some don't.

    I've had a few poweroutages lately that lasted long enough for the ups to run out of battery.
    Always same IP. In the 3 years I lived in this house I've only experienced two IP changes.

  • nerouxneroux Member

    For how long have you tried? It could be easily a temporary routing problem.

  • rds100rds100 Member

    Could be that you tried to connect to the wrong IP via ssh and triggered some auto filter by the provider. Some providers try to protect their customers from bruteforcer bots / port scanners.

  • @Pwner said:

    Wow, I've had that exact same problem... I didn't think they were blocking the sites just like that though... I autta' write em' a coherent but angerly worded letter about this!

    On the bright side, I live near AT&T's central office, so the connection is quite fast.

  • lazytlazyt Member

    No CSF or Fail2Ban installed? I've had firewalls block IP's due to connection problems before.

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