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You're right ! here is the script I run to configure the firewall : iptables -t filter -A INPUT -p icmp -i eth1 -j DROP iptables -t filter -A INPUT -p icmp -i eth0 -j ACCEPT iptables -A INPUT -p tcp -i eth1 --destination-port 22 -j DROP iptables -A INPUT -p tcp -i eth1 --destination-port 53 -j...

Actually I almost solved the problem because I realized that the firewall configured on the same machine caused the problem. I had do disable the firewall and it worked fine, but I still wonder what rule can let me send attachment or not.

Hi everybody ! I've got a problem with Qmail, sending emails with attachments. It seems that if I send an email with an attachment to a user of my domain it is delivered without problems, while if the dest. does not belong to my domain, the email is never delivered. I've not got problems whith...

Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.254 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 192.168.0.254...

when I make a telnet to my Linux Box I use the IP address and not the name: telnet 192.168.0.10 or telnet 192.168.0.10 25 telnet 192.168.0.10 110 (if I want to connect to the mail server)

Actually traceroute says that there are no problems. But the strange fact is that when I make a telnet to Linux and the router is on it takes half a second to connect, but if the router is off it takes many seconds.

I've made some tests and have understood that the main problem is the routing. The default routing is the Cisco router connected to one of the two ethernet devices. My network is connected to the other one. When the router is down (somentimes it happens) if a client try to connect to the pop or...

Hi everybody ! I've installed a linux box with 2 ethernets and configured it to work as a firewall and a mail server (QMAIL). I've noticed that when the router doesn't work or is turned off I can't access qmail(SMTP and POP whith a telnet or whith a mail client) neither the Xserver from a...