Welcome to the VanDyke Software Forums

Join the discussion today!


Go Back   VanDyke Software Forums > General

Reply
 
Thread Tools Display Modes
  #1  
Old 08-05-2019, 06:35 PM
dverbern dverbern is offline
Registered User
 
Join Date: Mar 2019
Posts: 23
Unhappy Help! Repeat error in VShell logs - Connection from an IP rejected due to filter err

I require some help - I am using VShell x64 v4.04.
For the past few days in the VShell logs, I have seen the following repeat error, which redacted is:

VShellSSH2 conn {SomeNumbers} IP address xxx.xxx.xxx.xxx {SomeNumbers} - - - 0 0 0 0 {My SFTP Server IP} 22 "{SomeNumbers}: Connection from 13.70.136.174 rejected due to filter error: Hostname lookup failed: host not found"

The IP xxx.xxx.xxx.xxx is listed in the Connection Filter, near the top of the list in terms of precedence, as:

Action: Allow
Source: xxx.xxx.xxx.xxx

If I enter that IP in the Test filter and click the Test button:

Result: Access denied. Reverse IP lookup failed.

It is entirely possible I am doing something wrong in my administration of this system. I'm running VShell on a Windows Server 2008 R2 VM, which sits in a DMZ, but refers DNS resolution requests to a series of domain controllers.

I don't know what the "Test" button in VShell does behind the scenes, but I'd guess it is something to do with host lookups, because when I do a NSLOOKUP of a IP or host that is allowed and passes the "Test" button, it returns a valid host, but conversely when I enter an IP or hostname that fails said Test, the NSLOOKUP likewise fails to return a host and instead returns:

nslookup xxx.xxx.xxx.xxx
Server: DomainController.domain.com
Address: {DomainControllerIP}

*** DomainController.domain.com can't find xxx.xxx.xxx.xxx: Non-existent domain
Reply With Quote
  #2  
Old 08-06-2019, 07:08 AM
bgagnon bgagnon is offline
VanDyke Technical Support
 
Join Date: Oct 2008
Posts: 3,938
Hi dverbern,

Please contact us directly at support@vandyke.com. There is quite a bit about VShell configuration that's going to be sensitive and is not appropriate for the public forums.
__________________
Thanks,
--Brenda

VanDyke Software
Technical Support
support@vandyke.com
(505) 332-5730
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 03:13 AM.