search for: dnsrbl

Hello to all members. I am using Dovecot for 5 years, but this is my first post here. I am aware of the various autoresponder scripts for vacation autoreplies (I am using Virtual Vacation 3.1 by Mischa Peters). I have an issue with auto-replies - it is vulnerable to spamming with forged email address. Forging can be prevented with several Postfix settings, which I did in the past - but was forced

Hi, Since upgrading our mail servers to Postfix/Dovecot, we've seen a rather large increase in botnet brute force password attacks. I guess our old servers were too slow to suit their needs. Now, when they hit upon a valid user, it's easy to see what passwords they are trying (we've enabled auth_debug_passwords and set auth_verbose_passwords = plain). We can easily have log

...tcp from any to any port = 143 flags S/SA keep state then write a program that does ioctl(ipauth) calls to inspect and accept/reject packets; not for the faint of heart. However, you can use whatever weird and wonderful methods you want to determine IMAP/POP/SMTP network access policy, including DNSRBL or parsing a text file. This thread seems to be spinning into non-dovecot subjects, and I'm not helping, so I'll stop. Joseph Tam <jtam.home at gmail.com>

We use a home-brew system similar to fail2ban to block traffic from IP addresses which appear to be doing Nasty Things(tm). The main thing our system does that fail2ban doesn't is to use a central DNSRBL we maintain allowing it to immedatiately ban listed IP addresses the first time they make an attempt to connection without waiting for them to hit a sufficient number of times to bring up the block. This system sends e-mail messages to our security alias whenever a blocking even occurs, either fro...

...sfer the updated zone. if any of the secondaries have the client-side set up as below, then the transfer will be done with rsync rather than slow named-xfer. for small zonefiles, this makes no difference (in fact, the rsync protocol overhead may be a net loss), but for large zonefiles (e.g. a 16MB dnsrbl type zonefile) it makes an enormous difference - only a hundred kilobytes or so transferred rather than the full 16MB. CLIENT SIDE CONFIGURATION ------------------------- 1. install rsync 2. configure named as usual to secondary the zone. e.g. zone "example.com" { type sla...

...8084450.GU2787@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20180108084450.GU2787@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Greylist: Sender passed SPF test, Sender IP whitelisted by DNSRBL, ACL 207 matched, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 08 Jan 2018 11:43:12 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 08 Jan 2018 11:43:12 +0000 (UTC) for IP:'150.101.137.141' DOMAIN:'ipmail...

after install libguestfs_xfs, all results are: [using guestfish] guestfish -N fs:xfs -m /dev/sda1 statvfs / bsize: 4096 frsize: 4096 blocks: 24713 bfree: 23391 bavail: 23391 files: 51136 ffree: 51133 favail: 51133 fsid: 2049 flag: 4096 namemax: 255 [using virt-rescure] virt-rescue -a test1.img ><rescue> mount /dev/sda1 /sysroot ><rescue> stat -f /sysroot File: