Jan 23, 2017 · I'm trying to set up a filter rule in Microsoft Exchange Online via the web interface (Office365 Admin Center > Exchange Admin Center > Mail Flow / Rules). I want to match the "sender address" against known addresses that are "inside the organization" so as to detect incoming phish/whale delivery.

Feb 19, 2017 · I know this is a bit old, but just to add something to it. One solution would be to create additional Capture Groups in your Regular Expression for the url in the match element of the rule, so as to extract explicit parts of the URL.

Nov 1, 2024 · So, looking at the rules alone, I see that smtpd_sender_restrictions is holding off the email transmission from a given server at its reject_unknown_helo_hostname with NOQUEUE: reject: RCPT from mx1.domain.com[20.4.18.2]: 450 4.7.1 <SSVBR0369.invalid.host>: Helo command rejected: Host not found; from=< [email protected] > to=< [email protected ...

You have typo in first regex, you should use {0,5} instead of (0,5}. You may want to remove last | in second regex. A (one|two|three|) regex matches empty string (as the 4th alternative inside parentheses is an empty string). So your long regex also matches just /s+/s+ - two subsequent spaces, carriage returns, etc. I think it was not intended.

Apr 23, 2023 · Im trying to create a simple modsecurity regex rule that stops processing the rules when a match is found and just returns status 200 on a POST request so that it doesnt continue and get blocked by another CRS rule later in the chain. Heres my rule:

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Nov 24, 2015 · When asking regex questions, always add the tag for the specific programming language or tool (e.g., Perl, Python, or Java; vi, emacs, or ɢɴᴜ grep; etc.) you are using. Learn more… Top users

Jul 9, 2016 · I've added some regex rules for sshd and want to ban all users in /var/log/secure that match this regex within the jail rules (3 attempts, 24 hours). But I do not want to wait for them to try again, I want them banned now .

Jun 14, 2022 · With fail2ban, I want to ban IPs based to the content of apache_access.log file. This is an example of line I want match with regex rules : 197.221.254.56 - - [13/Jun/2022:22:59:59 +0200] &quot;GET /

Feb 3, 2013 · I would like to create a Samba share that filters the contents of a directory based on a series of regular expression matches against file names. For example, I would like the share to allow access to only files with an .xml extension, effectively ignoring any filenames that don't match the regex.