Hi, IPTABLES is blocking all network traffic, whilst all connections work fine without it. Setup : Redhat 8 / 2.4.18-27.8.0 with HP Raid driver patch. (I hope this is not a cause of the problem.) IPtables version v1.2.8 Without iptables, i.e. stopping the service '/etc/init.d/iptables stop' everything works and communicates fine. Ping anything on my network, and the loopback interface just nicely. When starting the service '/etc/init.d/iptables start' any form of network communication is totally blocked, even with the following (BUT VERY OPEN) script; iptables --flush iptables --policy INPUT ACCEPT iptables --policy OUTPUT ACCEPT iptables -A INPUT -j LOG iptables -A OUTPUT -j LOG Have checked services with chkconf, iptables is running, as well as echo, in fact most things are, although there is no ipchains present(thus no clash). Have checked ps -aux, syslogd, klogd and xinetd are all running. Output from 'iptables -L' is; Chain INPUT(policy ACCEPT) LOG all -- anywhere anywhere LOG level debug prefix 'Trace INPUT: ' Chain FORWARD(policy DROP) Chain OUTPUT (policy ACCEPT) LOG all -- anywhere anywhere LOG level debug prefix 'Trace OUTPUT: ' Output from ping (for any ip address) is; ping 127.0.0.1 ping: sendmsg: Operation not permitted Nothing appears in either /var/log/messages or /var/log/kernel (from syslog.conf kern.* /var/log/kernel ). This is the worst part. I can't see anything happening anywhere. I have a Samba server running, and it is logging the same sendmsg error for the netbios port(137). I have searched for hours to solve this, and there appears to be something stopping packets at the iptables level, as without iptables installed, there is clear connections everywhere. Even rebooting the machine made no difference, as much as I expected. Being a novice, with a few years experience, I have always been able to get things solved with stuff on the net. This one has really got me beat. Thanks in advance, Conrad --- This email has been checked by a virus scanner, although the end reciever is responsible for their own scanning and checking of email and attachments. Outgoing mail is certified Virus Free by Virus scanner. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.668 / Virus Database: 430 - Release Date: 24/04/2004
