cancel
Showing results for 
Search instead for 
Did you mean: 

The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

 

Good afternoon,

I am trying to open a link in an email that gives me this 'Host Not Resolvable' error.
Capture.PNG

 

 

 

 

I did a rule trace and it doesn't look like MGW is blocking this.
trace.PNG

 

 

 

 

 

 

 

I went ahead and forwarded the email to a laptop that's off the network (wifi only) and I was able to open the links with no worries. I have been browsing the Support forums trying to find a solution as to why I keep getting the error message but to no avail.

Any suggestions on how I can remedy this issue?

Thank you,

David

3 Solutions

Accepted Solutions
Highlighted
Reliable Contributor marcus69
Reliable Contributor
Report Inappropriate Content
Message 2 of 4

Re: The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

Hi David,

the answer is quite simple: your Webgateway cannot resolve the FQDN with the configured DNS Servers.
Please check your DNS configuration:

2019-04-03 22_05_12-mwg-DNS.jpg

There should be a DNS that is able to get a resolution for marketing.bmifcu.org.
If you use the DNS Servers of your Windows Domain, they may not allow DNS forwarding for the Webgateway. So you'll probably have to do some deeper DNS investigation on this.

Another possibility would be to insert the Google Public DNS (8.8.8.8) as tertiary DNS, in case there no third DNS configured yet. But on this you may have to allow outbound DNS requests on port 53 for your Webgateway.

Best regards
   Marcus

McAfee Employee aloksard
McAfee Employee
Report Inappropriate Content
Message 3 of 4

Re: The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

Hi David,

Hope you are doing well.

Host Not Resolvable:-

This message will be displayed if Web Gateway is unable to contact the DNS server or if the DNS server returns a “No Such Name” response

 

The issue here is not with MWG but with the DNS servers configured in MWG.

 

Please refer below link for more information Host not resolvable error:-

 

https://community.mcafee.com/t5/Documents/Web-Gateway-Understanding-HTTP-502-s/ta-p/554073

 

nslookup marketing.bmifcu.org
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: marketing.bmifcu.org
Address: 206.71.80.80

 

It is seen that this URL resolves to IP Address 206.71.80.80.

 

A workaround could also be put in place on the Web Gateway’s hosts file. This would allow Web Gateway to resolve the hostname to an IP address without the need of a DNS Query. The hosts file can be edited on version 7.x under Configuration > File Editor > hosts.

 

Please refer attached screenshot for reference.

 

Regards

Alok Sarda

Re: The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

Our sys admin  added a DNS Record for the website to our internal DNS server and it worked.

 

thank you for the help!

3 Replies
Highlighted
Reliable Contributor marcus69
Reliable Contributor
Report Inappropriate Content
Message 2 of 4

Re: The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

Hi David,

the answer is quite simple: your Webgateway cannot resolve the FQDN with the configured DNS Servers.
Please check your DNS configuration:

2019-04-03 22_05_12-mwg-DNS.jpg

There should be a DNS that is able to get a resolution for marketing.bmifcu.org.
If you use the DNS Servers of your Windows Domain, they may not allow DNS forwarding for the Webgateway. So you'll probably have to do some deeper DNS investigation on this.

Another possibility would be to insert the Google Public DNS (8.8.8.8) as tertiary DNS, in case there no third DNS configured yet. But on this you may have to allow outbound DNS requests on port 53 for your Webgateway.

Best regards
   Marcus

McAfee Employee aloksard
McAfee Employee
Report Inappropriate Content
Message 3 of 4

Re: The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

Hi David,

Hope you are doing well.

Host Not Resolvable:-

This message will be displayed if Web Gateway is unable to contact the DNS server or if the DNS server returns a “No Such Name” response

 

The issue here is not with MWG but with the DNS servers configured in MWG.

 

Please refer below link for more information Host not resolvable error:-

 

https://community.mcafee.com/t5/Documents/Web-Gateway-Understanding-HTTP-502-s/ta-p/554073

 

nslookup marketing.bmifcu.org
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: marketing.bmifcu.org
Address: 206.71.80.80

 

It is seen that this URL resolves to IP Address 206.71.80.80.

 

A workaround could also be put in place on the Web Gateway’s hosts file. This would allow Web Gateway to resolve the hostname to an IP address without the need of a DNS Query. The hosts file can be edited on version 7.x under Configuration > File Editor > hosts.

 

Please refer attached screenshot for reference.

 

Regards

Alok Sarda

Re: The Host is not resolvable MGW 7.8.2.7.0

Jump to solution

Our sys admin  added a DNS Record for the website to our internal DNS server and it worked.

 

thank you for the help!

More McAfee Tools to Help You
  • Subscription Service Notification (SNS)
  • How-to: Endpoint Removal Tool
  • Support: Endpoint Security
  • eSupport: Policy Orchestrator
  • Community Help Hub

      New to the forums or need help finding your way around the forums? There's a whole hub of community resources to help you.

    • Find Forum FAQs
    • Learn How to Earn Badges
    • Ask for Help
    Go to Community Help

    Join the Community

      Thousands of customers use the McAfee Community for peer-to-peer and expert product support. Enjoy these benefits with a free membership:

    • Get helpful solutions from McAfee experts.
    • Stay connected to product conversations that matter to you.
    • Participate in product groups led by McAfee employees.
    Join the Community
    Join the Community