Have you enabled keepalive in imapd.conf?
tcp_keepalive: 1
--
.:.Sebastian Hagedorn - Weyertal 121 (Gebäude 133), Zimmer 2.02.:.
.:.Regionales Rechenzentrum (RRZK).:.
.:.Universität zu Köln / Cologne University - ✆ +49-221-470-89578.:.Am 16.03.20 um 16:13 schrieb Heiler Bemerguy: > Hey Guys, > > I have seen this on my Cyrus server 2.5.10, which is preventing new > users on IMAP: > > root@mailer:~# netstat -na |grep 177.194.176.48 |wc -l > 27 > root@mailer:~# netstat -na |grep 177.194.176.48 > tcp 0 0 10.1.200.226:143 177.194.176.48:56330 ... > > Not even a single byte is sent to this IP (as seen on tcpdump), and this > Debian's tcp keepalive is set like: > > net.ipv4.tcp_keepalive_intvl = 5 > net.ipv4.tcp_keepalive_probes = 3 > net.ipv4.tcp_keepalive_time = 60 > > And there's an iptables rules like this: > > iptables -A INPUT -p tcp --syn --dport 143 -m connlimit > --connlimit-above 10 --connlimit-mask 32 -j REJECT > iptables -A INPUT -p tcp --syn --dport 143 -j ACCEPT > > Even though this user is multiple connected like that for HOURS....... > > -- > Best Regards, > > Heiler Bemerguy - CINBESA > Analista de Redes, Wi-Fi, > Virtualização e Serviços Internet > (55) 91 98151-4894 > > > ---- > Cyrus Home Page: http://www.cyrusimap.org/ > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ > To Unsubscribe: > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus >
<<attachment: Hagedorn.vcf>>
smime.p7s
Description: S/MIME Cryptographic Signature
---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
