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Problem pinging RRAS server from outside the network

Posted on 2016-10-03
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Last Modified: 2016-10-26
RRAS has been working successfully for a few years.  Last week something seems to have changed and we are no longer able to ping the public IP Address that is port forwarded to the Windows 2k3 server IP Address 192.168.100.3

From the 192.168.100.3 server, if we go to http://canyouseeme.org we see our public IP address.  When we check Port 1723 (PPTP port) we get a successful reply which leads us to believe that both the firewall and ISP are not blocking this port.

We are currently using an ASA 5506-X running ASA Version 9.4(1)

access-list outsideif_in extended permit tcp any object obj-192.168.100.3 eq pptp

object network obj-192.168.100.3
 nat (insideif,outsideif) static (Public IP Address)

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netstat -an -o |find /i "listening" shows in attahcment.

Does anyone have any suggestions?
netstat.JPG
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Question by:morther
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Accepted Solution

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masnrock earned 500 total points
ID: 41827788
Is ICMP traffic set to be blocked anywhere? If so, there possibly lies your issue. You need to check the ASA and the server. Also, have you tried pinging the server's private IP address from within the network? If this works, then the issue points to the ASA. If this doesn't work, then it points to the server itself.

While you mention that you cannot ping the server, it also sounds like the server has not been down either. Is that correct?
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Author Comment

by:morther
ID: 41828458
Thanks masnrock for the reply.  I am able to ping the internal address of the server.

ICMP is exactly the same on the ASA as it was 4 months ago when I made my last backup.  Below are the ICMP settings.

object-group icmp-type icmpallow
 icmp-object echo-reply
 icmp-object traceroute
 icmp-object unreachable
 icmp-object source-quench

access-list outsideif_in extended permit icmp any any object-group icmpallow

icmp unreachable rate-limit 1 burst-size 1

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02

  inspect icmp

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This is really strange that it just stopped working last week.  It seems as though the ISP has change something or blocked something, but they assure me nothing has changed.  Ughhhh!
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Author Comment

by:morther
ID: 41831862
Is there anyone that might have a suggestion of the issue I am having?
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Expert Comment

by:masnrock
ID: 41832407
So the problem is definitely within the ASA. Have you tried clearing out the ICMP configuration, then setting it up again with the same rule?

Another step you can try is to change "outsideif_in" to "outside_in" on line 7.
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Author Comment

by:morther
ID: 41834134
Thanks Masnrock:  I tried what you suggested, but no luck.  Still unable to ping the from outside the network.  This is really crazy, because this was working and nothing had changed on my side.  No firewall or server changes.
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Expert Comment

by:masnrock
ID: 41834180
Can you pull up any firewall logs that may help? Usually there is going to be something that will indicate what rule denied or rejected it?
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Author Closing Comment

by:morther
ID: 41860383
Hello Masnrock.  You were correct, there was a problem with the ICMP. We ended up adding the last line "icmp-object echo" and that fixed the issue.  Really not sure how this was working before, but happy it is now.

bsesingasa# sho run object-group id icmpallow
object-group icmp-type icmpallow
 icmp-object echo-reply
 icmp-object traceroute
 icmp-object unreachable
 icmp-object source-quench
 icmp-object echo

Thanks for you great help.  Mike
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Expert Comment

by:masnrock
ID: 41860394
You're quite welcome, and glad you're functioning properly at this point.
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