Snort mailing list archives
Re: my logs is flooding with snort w/ some weird message about port 53
From: Ramin Alidousti <ramin () cannon eng us uu net>
Date: Tue, 4 Sep 2001 15:30:18 -0400
I think that your dns server (named) has been told to send out queries with port (53). These are the responses coming back. Take a look at "/etc/named.conf" and see if you have such an entry: options { ... query-source address * port 53; ... }; If you comment this out then the queries sent out by your server will be from the unprivileged ports (>1023) and sort will not complain. Otherwise, take a look at: misc.rules: alert udp $EXTERNAL_NET 53 -> $HOME_NET :1023 (msg:"MISC source port 53 to <1024"; classtype:bad-unknown; sid:515; rev:2;) Hope it helps, Ramin On Tue, Sep 04, 2001 at 02:47:19PM -0400, alexus wrote:
hello for some reason i get a lot of traffic on my port 53, even though my nameserver is closed for public, can someone explain me what does that mean? Sep 4 14:44:05 box snort[11565]: [1:515:2] MISC source port 53 to <1024 [Classification: Potentially Bad Traffic] [Priority: 2]: {UDP} 24.69.255.195:53 -> 66.92.98.145:53 Sep 4 14:44:08 box snort[11565]: [1:515:2] MISC source port 53 to <1024 [Classification: Potentially Bad Traffic] [Priority: 2]: {UDP} 194.67.2.114:53 -> 66.92.98.145:53 Sep 4 14:44:08 box snort[11565]: [1:515:2] MISC source port 53 to <1024 [Classification: Potentially Bad Traffic] [Priority: 2]: {UDP} 207.236.57.98:53 -> 66.92.98.145:53 Sep 4 14:44:08 box snort[11565]: [1:515:2] MISC source port 53 to <1024 [Classification: Potentially Bad Traffic] [Priority: 2]: {UDP} 207.236.57.98:53 -> 66.92.98.145:53 just for example right now it's 2:45pm and since morning i already got su-2.05# grep -c "MISC source port 53" /var/log/all.log 9222 su-2.05# of those entryes in my log please help if this a legit traffic which rule i can comment out so it wont show in my logs? and if this traffic is legit why is it shows as "potentially bad traffic"? thanks in advance _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
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Current thread:
- my logs is flooding with snort w/ some weird message about port 53 alexus (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 Ramin Alidousti (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 alexus (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 Ramin Alidousti (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 alexus (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 Ramin Alidousti (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 alexus (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 alexus (Sep 04)
- Re: my logs is flooding with snort w/ some weird message about port 53 Ramin Alidousti (Sep 04)