Asus RT-AC68U blocking ports 465 and 995

Discussion in 'Network Routers' started by Robert Peirce, Jan 26, 2015.

  1. I connect to the internet but I am unable to log into my mail servers --
    1and1 and verizon -- on ports 465 (SMTP) and 995 (POP). The only way I
    figured out it was the router was by swapping my old Linksys back in.
    The problem went away.

    I have no idea how to unblock these ports and would appreciate any
    assistance. On other routers it seems to be very Mac like and just
    works so I have never had to deal with the problem before.
    Robert Peirce, Jan 26, 2015
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  2. After playing around a bit I found I could log onto 1and1 but not
    verizon. Both use the same ports. The router does not appear to be
    blocking ports except verizon works fine if I replace the Asus router
    with my previous linksys router. Therefore, something is going on in
    the router but I don't know what.
    Robert Peirce, Jan 28, 2015
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  3. If you have not already done so, reset the router to factory default and
    see if the problem goes away.

    It could be you got one that had been returned by someone with some
    strange firewall or other setting locked into it.

    Other thing is to try to go to the problem site(s) using the IP address
    rather than the URL name and see if that works. If it does it's time to
    change DNS servers.
    GlowingBlueMist, Jan 28, 2015
  4. Curiouser and curiouser. My wife had 1and1 and verzizon in mail. Since
    she wasn't using verizon for anything I took it out. After that she
    couldn't log into 1and1 anymore. It appears the Asus, in some strange
    way, will not connect to the "last" server. In my wife's case it is now
    the first server.

    I went back to the Linksys until I get an answer.
    Robert Peirce, Jan 28, 2015
  5. I did that but it didn't help.
    I believe mine was new. Also, I just installed the latest software update.
    I get there okay on the Linksys. I also discovered the ability to log
    onto a mail server seems to depend on how many are in the list. I have
    two and the second one, verizon, doesn't work. My wife had the same
    two. When I removed verizon, 1and1 stopped working. There is something
    weird about this router.
    Robert Peirce, Jan 28, 2015
  6. Robert Peirce

    Char Jackson Guest

    This: "the ability to log onto a mail server seems to depend on how many are
    in the list."

    What does that mean? What list? We're missing some key information here,
    including any configuration you might have done to the router itself.
    Char Jackson, Jan 28, 2015
  7. Robert Peirce

    idunno Guest

    It could be you got one that had been returned by someone with some
    It really does sound like a firewall issue; try completely disabling the
    firewall and maybe set DNS to Google ( to rule out host lookup
    issues. If it works with the firewall disabled you've found the problem.
    Some of the user interfaces on these consumer routers are quite bad and
    it can be hard to tell what exactly is being blocked. If it does logging
    turning that on can help determine what's going on.
    idunno, Jan 28, 2015
  8. Sorry. In the mail client on a Mac you have a list of accounts. Mine
    are iCloud [IMAP],localhost [POP], Peirce Family [][POP] and
    Verizon Mail [][POP]. All these connect perfectly when I use
    my old Linksys router. On the Asus they all fire up except the last
    one. My wife's computer does the same thing.

    If you remove the last one in the list then the next to last will fail
    to fire up. I tested this on my wife's computer. She had 1and1 and
    verizon but did not use verizon. After deleting it 1and1 would not log in.
    Robert Peirce, Jan 28, 2015
  9. I did a default setup. I had put a list of DNS servers on the Linksys.
    I have no idea what might be on the Asus. I will look into setting
    those to see what happens. If that doesn't work I will try turning off
    the firewall on the computer and router to see if that does anything.
    Robert Peirce, Jan 28, 2015
  10. Robert Peirce

    Char Jackson Guest

    Does traceroute die at the router? Does telnet (to the desired port, not the
    telnet default port) also die at the router?

    The thing is, the router doesn't know that you've added or removed email
    accounts on the computer, so I don't see why it might be acting the way it
    appears to be acting.

    Do you know how to use a TCP packet capture program?
    Char Jackson, Jan 28, 2015
  11. Robert Peirce

    Char Jackson Guest

    You've ruled out DNS lookup issues, right? If not, then start there.
    I see the suggestion above, but no word on whether you followed through.
    Char Jackson, Jan 28, 2015
  12. I haven't tried either but I will. Traceroute looks like it could be
    useful. I'm not sure about telnet, since I don't really know how to use
    it. It would be interesting to know if mail thinks it is trying to log
    onto the server but it actually isn't.
    Exactly. I can't figure that either. I called Asus and they don't
    know. They suggested using port triggering except all the mail servers
    use the same ports and it is only the last server that hangs. How would
    the router know it is the last server?

    All I know is that my wife's computer could log onto 1and1 but not
    verizon, the last in the account list, until I removed verizon. Then it
    couldn't log onto 1and1, which was now the last in the account list.
    Robert Peirce, Jan 28, 2015
  13. traceroute to (, 64 hops max, 52 byte
    1 ( 2.195 ms 0.881 ms 0.853 ms
    2 ( 11.040 ms 9.716 ms 15.941 ms
    3 ( 9.136 ms 8.712 ms 12.290 ms
    4 ( 11.342 ms
    12.289 ms 82.687 ms
    5 ( 76.154 ms
    50.315 ms 16.059 ms
    6 ( 15.012 ms
    20.060 ms 14.431 ms
    7 ( 29.996 ms ( 110.537 ms ( 364.364 ms
    8 ( 371.847 ms ( 329.104 ms ( 39.274 ms
    9 ( 25.914 ms
    16.906 ms ( 21.017 ms
    10 * * *
    11 ( 20.826 ms ( 22.890 ms ( 19.621 ms
    12 * * *

    $ telnet 465
    telnet: connect to address Operation timed out
    telnet: Unable to connect to remote host

    whois says is MCI d/b/a Verizon Business. I have to try
    to contact them because it may be some IP in the chain is being
    blacklisted. Interesting. Thanks for the advice.
    Robert Peirce, Jan 28, 2015
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