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Author Topic: Blocking zip attachments  (Read 5047 times)
dda
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« on: Friday 04 November 2016, 10:43:51 am »

Getting a steady flood of ransomware laden zip attachments, anyone have a clue how I can block these?
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dda
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« Reply #1 on: Friday 11 November 2016, 01:04:05 am »

Anyone?
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Gabriel GHEORGHIU
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« Reply #2 on: Saturday 12 November 2016, 03:44:31 am »

Hi,

Please try this: Proxy -> SMTP -> Configuration -> File settings -> enable "Block files by extensions" -> enable "Block archives that contain blocked filetypes" -> choose extension(s) -> Save
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dda
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« Reply #3 on: Saturday 19 November 2016, 03:26:14 am »

Being under the SMTP section i assumed this was related to outgoing email.
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Gabriel GHEORGHIU
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« Reply #4 on: Saturday 19 November 2016, 04:47:26 am »

Being under the SMTP section i assumed this was related to outgoing email.

Hi dda,

No, it's working in both ways.

I'm using these settings everyday.

"The purpose of the SMTP proxy is to control and optimise the SMTP traffic and to protect the local networks from threats when using the SMTP protocol. SMTP is used whenever an e-mail is sent from a local e-mail client to a remote mail server, that is, for the outgoing e-mails. It will also be used if an mail server is running on the LAN (i.e., within the GREEN zone) or DMZ (ORANGE zone) and the e-mails can be sent from outside the local network (incoming requests) through t hat mail server, that is, when clients are allowed to send e-mails from the RED interface."

http://docs.endian.com/3.2/utm/proxy/smtp.html
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dda
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« Reply #5 on: Tuesday 22 November 2016, 01:50:11 am »

I don't have a mail server behind the firewall will this still work for me?
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Gabriel GHEORGHIU
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« Reply #6 on: Tuesday 22 November 2016, 04:21:01 am »

Hi dda,

I really don't know! I never tried this scenario. My email server is in DMZ.
But you can try. It's very easy to try. Is that server your email server, even if isn't behind your firewall?
Presuming yes, you send and receive emails also from a desktop client (Thunderbird, Outlook, ...) not only from web mail. Maybe will work.
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dda
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« Reply #7 on: Wednesday 23 November 2016, 12:37:41 am »

Yes I am using outlook as a client and the emails are still passing thru.  I have had two machines recently with ransomware infections that came inside zip files so I am trying to prevent it happening again.
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