Look at this one: [r...@smtp ~]# host 82.240.88.126 126.88.240.82.in-addr.arpa domain name pointer val13-2-82-240-88-126.fbx.proxad.net. [r...@smtp ~]# netstat -atpn | grep 82.240.88.126 tcp 0 0 139.124.132.126:993 82.240.88.126:60250 ESTABLISHED 9209/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60229 ESTABLISHED 8824/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60235 ESTABLISHED 8016/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60234 ESTABLISHED 8570/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60265 ESTABLISHED 10316/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60180 ESTABLISHED 3795/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60190 ESTABLISHED 5258/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60167 ESTABLISHED 5882/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60213 ESTABLISHED 6758/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60219 ESTABLISHED 8421/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60196 ESTABLISHED 7486/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60206 ESTABLISHED 7520/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:63218 ESTABLISHED 6288/imapd tcp 0 0 139.124.132.126:993 82.240.88.126:60158 ESTABLISHED 5504/imapd
I don't know how many processes we can have with a decent speed. For the moment, it turns to be around 1000 processes, but I don't know the max whe can stand. So the idea of mayak can be a solution. Filter with iptables 193.218.15.25 13 82.240.88.126 16 80.13.69.148 12 for the top, I got lines like this: Apr 14 16:10:25 smtp imaps[13462]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:11:43 smtp imaps[13530]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:11:43 smtp imaps[31581]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:12:41 smtp imaps[13644]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:12:42 smtp imaps[13481]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:15:08 smtp imaps[14234]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:15:08 smtp imaps[29088]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:17:14 smtp imaps[14080]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Apr 14 16:17:15 smtp imaps[14212]: login: val13-2-82-240-88-126.fbx.proxad.net [82.240.88.126] xxxxx plaintext+TLS User logged in Checking mail a little bit too much. 2009/4/14 Joseph Brennan <bren...@columbia.edu> > > LALOT Dominique <dom.la...@gmail.com> wrote: > > > Hello, > > > > I've looked at google before asking, but I didn't find something. > > Some imap clients are using many tcp connexions. I would like to know if > > there is a way to limit them? > > > This could make the client fail and increase your helpdesk calls. Do > you mean more than five? > > Whatever you do should check both host and user, so that you don't cut > off multiple users on a timeshare host or a firewall gateway. > > > Joseph Brennan > Lead Email Systems Engineer > Columbia University Information Technology > > > ---- > Cyrus Home Page: http://cyrusimap.web.cmu.edu/ > Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html > -- Dominique LALOT Ingénieur Systèmes et Réseaux http://annuaire.univmed.fr/showuser.php?uid=lalot
---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html