similar to: sshd killed due to dos attack

The patch below (against openssh 3.2.3p1) adds a CheckMaxStartups option, defaulting to yes, to determine whether sshd calls drop_connection(). The motivation behind this is twofold. In our environment, our timesharing machines get enough incoming connections that will trigger spuriously with the default value (10 forked unauthenticated connections) as well as some significantly higher values,

OK, Something wacky. I'm getting many, many of these, it just keeps building: --snip-- netstat -vat: tcp 0 0 192.168.103.99:http statusurl.e-gold.com:57015 SYN_RECV tcp 0 0 192.168.103.99:http statusurl.e-gold.com:26377 SYN_RECV tcp 0 0 192.168.103.99:http statusurl.e-gold.com:64279 SYN_RECV tcp 0 0

> On Jul 28, 2015, at 21:52 , Steffan Cline <steffan at hldns.com> wrote: > > Ok, I think I have come a little further. > > When dovecot stops accepting connections, I checked netstat and found this: > > [root at hosting1 ~]# netstat -an | grep 993 > tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN > tcp 0 0

Permissions to the logs are fine. In /var/log/maillog I do see dovecot logging in there but nothing that indicates why there?s a failure. The one thing I thought of is if there?s too many connections but I am using a firewall that blocks excessive attempts but that?s fine. Netstat shows a bunch of CLOSE_WAIT though. I?ll try the debug level and see what I find. Thanks, Steffan Cline steffan at

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tue, 28 Jul 2015, Steffan Cline wrote: > When dovecot stops accepting connections, I checked netstat and found this: > > [root at hosting1 ~]# netstat -an | grep 993 > tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN > tcp 0 0 65.39.x.x:993 184.101.x.x:36351 SYN_RECV

Hi, Please redirect me to the right mailing list if this is not the correct one. I would like to know what stable version of OpenSSH added support for IPv6 for the first time ? Thanks in advance, Ravindra

Hi, I got a problem with iproute and shorewall but I don''t know where the real problem is yet, perhaps someone can shed any light on this one. What we currently do is route all traffic coming from a specific host through our second isp''s nat router. This is done via SNAT on our own router. /etc/shorewall/masq: eth2 $INTERNALHOSTA 192.168.0.142 We now

Hi, We serve a fairly substantial number[1] of ssh connections across our fleet.? We have hit MaxStartups limits in the past and bumped it up a few times (currently at 300), but we have no warning before the limit is reached and connections start being dropped.? What I would love is some sort of instrumentation that could let us see the highest number of concurrent pre-auth connections the

Hello, today I came to my job and I noticed that apache is not running. When I tried to run it, I learned that port 80 uis already in use. Using netstat -aenpl I tried to learn wha proces is using port 80, but I only leatned this: tcp 0 0 172.16.0.1:80 172.16.0.1:35664 SYN_RECV 0 0 - tcp 0 0 172.16.0.1:80 172.16.0.1:43464 SYN_RECV 0 0 - tcp 0 0 172.16.0.1:80 172.16.0.1:33764 SYN_RECV 0 0 - tcp

Hi All, I am planning to implement Ogg Vorbis Decoder on a 24 bit DSP. I have following doubts: 1) What is min and max bitrate? 2)What is max Audio Packet size ? 3)What is the max size of setup header? 4)Any idea how to start for making a 24Bit fixed point reference code? Shall I start with floating point or Tremor or Tremor Low Mem Version? 5) What window sizes in Ogg Vorbis are normally

Anybody else experience the need to restart puppetmasterd before a node can register itself. I''ve been cleaning up my installation here on client nodes and every once and a while I find myself needing to restart the puppetmaster daemon. A client node attempts to connect and never does. A restart fixes things. There doesn''t seem to be anything useful in the error messages

hi, i'm implementing journaling support in vfat, basically i'want to know that how kernel come to know about unclean unmount at the time of reboot, if i'm not wrong it must be checking this before mounting a filesystem. plz help me in this regard as soon as possible. cheers ravi

Reporting-MTA: dns; mail.sheltoncomputers.com X-SC-Mail-Server-Queue-ID: B84AF1B60004 X-SC-Mail-Server-Sender: rfc822; system17 at sheltoncomputers.com Arrival-Date: Fri, 29 Oct 2010 03:37:02 -0400 (EDT) Final-Recipient: rfc822; admin at sheltoncomputers.com Original-Recipient: rfc822; root Action: failed Status: 5.3.0 Diagnostic-Code: x-unix; internal software error Part 1.2 Subject: Cron

I''m not a subscribed user, so please cc me on any replies (fier0@bigfoot.com). I know this has been asked a few times, but i have not been able to find a direct answer. I was using shorewall with 2 nics, and it worked fine, except if that linux box went down then nobody could get out to the internet (and the wife would kick my ass). I''ve now started to use my linksys

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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Dear all! I'm stuck. I've got a dovecot IMAP server running (TLS, port 149) on Ubuntu 13.04 server behind a DSL router. The mailserver's IP is 10.0.0.1 When I connect to my mailbox from my intranet-PC (10.0.0.2), everything works as expected. Login OK, acces to all mailboxes is ok, everything. netstat -nt on my email server shows me:

Dear All Can you please do me favor and let me know how can I convert *.wav files into 32 bit 44 KHz ? Please be informed that I have specific sound files in *.wav format that I converted them into *.gsm format with the aid of the following command : #sox FR00003.wav FR00003.gsm It got through but the voice quality is poor . I need to convert the original *.wav sound files (their file attribute is

This was due to a ProxyRequests On Let this be a lesson to all. [root at localhost log]# cat /proc/net/ip_conntrack | wc -l 11042 [root at localhost log]# cat /proc/sys/net/ipv4/ip_conntrack_max 28632 [root at localhost log]# cat /var/log/messages ... Sep 2 04:04:30 localhost kernel: printk: 213 messages suppressed. Sep 2 04:04:30 localhost kernel: ip_conntrack: table full, dropping

Hi. >From my understanding the MaxStartups option can be set to limit the number of concurrent sessions the OpenSSH server opens. My concern is how OpenSSH handles the case where this number is reached. >From the code it looks like it simply closes the socket: sshd.c:1440 if (drop_connection(startups) == 1) { debug("drop connection #%d", startups); close(newsock);

Hi! I have reprise try to resolve this problem, suspended from 17 dec 2005 I have try to apply the suggest of Jerry (see above). The problem still exist. See attach shorewall config, dump and tcpdump when I check to exit whit SSH from firewall... In the masq file is reported the last my attempt in order to resolve my problem, however I have test also the example reported in MultiISP.html, but