03-01-2010
Anything to do with hardware or communications is machine-specific. Please post what Operating System you are running and what hardware you have.
9 More Discussions You Might Find Interesting
1. AIX
Hi. I would like to be able to deny IP address for too many failed login attemps (either from ssh, sftp, ftp, etc). The system I wish this to work on is an AIX 5.1 system. I'm new to AIX but I'm a linux user. There is a program for linux called fail2ban which reads from the log files and see if... (1 Reply)
Discussion started by: metzgerh
1 Replies
2. AIX
Hi,
I have created the below ftp script to put files over to our capacity server, the check at the end works if ftp fails to run however if the script cannot login or the transfer itself failed there is no warnings.
Does anyone know the syntax to trap the erorr codes or to put a check within... (3 Replies)
Discussion started by: chlawren
3 Replies
3. UNIX for Advanced & Expert Users
Hi Experts,
need help about release or refresh TCP Connection:
i have the sample like below :
application log connection:
0500 ( 192.168.0.1:36053) 00919 2007/05/10 23:30:25 112 13 2007/05/10 23:30:25 1969/12/31 17:00:00
0500 ( 192.168.0.1:36054) 00920 2007/05/10 23:30:26 000 00... (3 Replies)
Discussion started by: bucci
3 Replies
4. UNIX for Dummies Questions & Answers
# netstat -a > /test/a
getnameinfo failed
getnameinfo failed
getnameinfo failed
getnameinfo failed
getnameinfo failed
command is working fine (as i get output in file /test/a)
# dig -x 10.xxx.xxx.xxx
; <<>> DiG 9.3.3rc2 <<>> -x 10.203.xxx.xxx
;; global... (4 Replies)
Discussion started by: crackthehit007
4 Replies
5. UNIX for Dummies Questions & Answers
I wrote a very simple script to calculate the DB connection from an appserver and check the total netstat connection to a particular DB exceed 25 then it will send mail
netstat -a 2> /dev/null | awk '/.*ESTAB/{print $5}' | cut -d. -f1 | uniq -c | awk '{if ($1 > 25)print $2," exceed ",$1;}'
... (1 Reply)
Discussion started by: senthil.ak
1 Replies
6. Solaris
Hello,
Actually there are some bugs in application which does not close the TCP connection to other server though CORBA.
We need to kill that ESTABLISHED connections as new connection are not happeneing as the allocated ports were used and showing as ESTABLISHED
Is there any... (4 Replies)
Discussion started by: GIC1986
4 Replies
7. Solaris
Hey all I'm having a big problem here. Someone is attempting an SSH to a destination host on which an account resides and locking the account. I'm trying to determine who is performing the SSH attempts from my host. For instance they're logged in as their standard account but then (I'm assuming)... (13 Replies)
Discussion started by: MaindotC
13 Replies
8. IP Networking
Hello
netstat -p give below 6634176 connections as closed.How do we trace that which all connections are being closed on the server?
1366888371 data packet headers correctly predicted
1195906 connection requests
5227320 connection accepts
5992919... (6 Replies)
Discussion started by: Vishal_dba
6 Replies
9. Cybersecurity
The purpose of this thread is for everyone to follow the same methodology so we can create a future table, for the benefit of all, that shows how many failed login attempts (hacking) per day per server (and per minute) are happening.
This is not a thread on writing scripts or creating... (10 Replies)
Discussion started by: Neo
10 Replies
LEARN ABOUT FREEBSD
tcpdrop
TCPDROP(8) BSD System Manager's Manual TCPDROP(8)
NAME
tcpdrop -- drop TCP connections
SYNOPSIS
tcpdrop local-address local-port foreign-address foreign-port
tcpdrop [-l] -a
DESCRIPTION
The tcpdrop command may be used to drop TCP connections from the command line.
If -a is specified then tcpdrop will attempt to drop all active connections. The -l flag may be given to list the tcpdrop invocation to drop
all active connections one at a time.
If -a is not specified then only the connection between the given local address local-address, port local-port, and the foreign address
foreign-address, port foreign-port, will be dropped.
Addresses and ports may be specified by name or numeric value. Both IPv4 and IPv6 address formats are supported.
The addresses and ports may be separated by periods or colons instead of spaces.
EXIT STATUS
The tcpdrop utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
If a connection to httpd(8) is causing congestion on a network link, one can drop the TCP session in charge:
# sockstat -c | grep httpd
www httpd 16525 3 tcp4
192.168.5.41:80 192.168.5.1:26747
The following command will drop the connection:
# tcpdrop 192.168.5.41 80 192.168.5.1 26747
The following command will drop all connections but those to or from port 22, the port used by sshd(8):
# tcpdrop -l -a | grep -vw 22 | sh
SEE ALSO
netstat(1), sockstat(1)
AUTHORS
Markus Friedl <markus@openbsd.org>
Juli Mallett <jmallett@FreeBSD.org>
BSD
January 30, 2013 BSD