netdev - Re: After many hours all outbound connections get stuck in SYN

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <83a51e120712200808m7fa63e9jc588124a6da5f740@mail.gmail.com>
Date:	Thu, 20 Dec 2007 11:08:45 -0500
From:	"James Nichols" <jamesnichols3@...il.com>
To:	"Eric Dumazet" <dada1@...mosbay.com>
Cc:	"Jan Engelhardt" <jengelh@...putergmbh.de>,
	linux-kernel@...r.kernel.org,
	"Linux Netdev List" <netdev@...r.kernel.org>
Subject: Re: After many hours all outbound connections get stuck in SYN_SENT

> I still dont understand.
>
> "tcpdump -p -n -s 1600 -c 10000" doesnt reveal User data at all.
>
> Without any exact data from you, I am afraid nobody can help.

Oh, I didn't see that you specified specific options.  I'll still have
to anonymize 2000+ IP addresses, but I think there is an open source
tool that will do this for you.



> >> 2) Are you sure you are not using connection tracking, and hit a limit on it ?
> >
> > I'm using ip_conntrack, but the limit I have for max entries is 65K.
> > The most I've seen in there are a couple thousand- that was one of the
> > first things I monitored very closely.
>
> Now please try without conn tracking module. I saw many failures in the past
> that were trigered by conntrack.
>
> Do you have some firewall rules, using some netfilter modules like hashlimit ?

I will have to look into this.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html