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All TCP packets blocked by ISP (o2?)

  • May 2, 2019
  • 5 Antworten
  • 211 Aufrufe
A
Besucher:in
Coming from https://hilfe.o2online.de/router-software-internet-telefonie-34/no-internet-connection-all-router-lights-are-green-and-i-can-ping-websites-496078 which was marked as "gelöst" but is still not resolved.

My router works perfect, I can connect to the internet with any protocol (UDP,ICMP...) except TCP, it looks like all the TCP packets incoming to my router from the internet are blocked. This means that I cannot browse any webpage or have any normal functionality since 3 days ago. I am able to use TCP between two computers connected locally to my router, so it is not a local problem. How can I solve this? Why does this happen?

Thanks,
Aitor

Lösung von o2_Lars

See this thread.
Regards,
Lars
    Zu diesem Thema können keine neuen Antworten hinzugefügt werden. Du kannst gern ein eigenes Thema erstellen.

    5 Antworten

    Klaus_VoIP
    Legende
    Please continue in the old thread!

    btw - internet ist primary based on TCP/IP and of course you get this from o2.
    Sounds like a firewall problem, because o2 remove nothing from "original internet".
    Meine persönlichen Meinungsäußerungen als Kunde sind NICHT gesponsert und stellen nur meine unverblümte Meinung dar! Dafür erfolgen alle Inhalte pro bono publico. ;-)
    A
    Besucher:in
    • aitor4p
    • Autor
    • Besucher:in
    • May 3, 2019
    I do not have any firewall, I have 6 devices (computers, phones, xbox, smart speaker) all having the same problem, everything was working until Monday night and I did not change/add anything , I can send TCP packets from computers inside my network without a problem. So my packets are being blocked before arriving to my router from the internet, maybe some o2 firewall has been misconfigured for my personal connection?
    Klaus_VoIP
    Legende
    impossible
    Meine persönlichen Meinungsäußerungen als Kunde sind NICHT gesponsert und stellen nur meine unverblümte Meinung dar! Dafür erfolgen alle Inhalte pro bono publico. ;-)
    A
    Besucher:in
    • aitor4p
    • Autor
    • Besucher:in
    • May 3, 2019
    Well, I have some networking knowledge, enough to know that TCP is working in my local network, DNS trough UDP, traceroute and ping through ICMP are working, TCP is not working once it reaches the internet nor incoming TCP packages arrive to my router. So it might be that my router blocks external TCP packages suddenly or that my connection is somehow blocking TCP packages.
    o2_Lars
    • o2_LarsModerator
    • Moderator
    • Lösung
    • May 13, 2019
    See this thread.
    Regards,
    Lars
    ≋ Schnickschnack. Gedöns. Krams. Spiel, Spaß, Spannung ➤➤➤ g.o2.de/wcr ≋
    Klaus_VoIP
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