Slow POP3 / SMTP / FTP connection from internal windoze machines tolinux firewall (gateway)

[Greg Caskey]

Hello...   I have a 6.2 machine setup with DNS services from my ISP. This machine acts as our firewall/gateway machine as well as our qmail pop server.  The machine has two Nic's one external  and one for the internal network both have separate IP's. Our internal network consists of many win95 - win2K machines. The problem is in our internal network access to the gateway machine. Any Connect attempts (port 110/23/etc) from internal to our firewall runs very slow but will eventually connect (/var/log/maillog reports upto 4mins of wait time) to the RH 6.2 machine. External access is fast (ftp, pop3 or http). running netstat -rn is fast and netstat -a (or route) is slow. This tells me that DNS resolution (or reverse IP lookup) is failing somewhere I believe the problem is that because our ISP is hosting our DNS it does not know anything about our internal IP 10.0.0.1 as is showing when you run nslookup 10.0.0.1 - "no response from server" My question then is how do I change this. I have added the line to the /etc/hosts file: (which made netstat -r fast) 10.0.0.1 fqdn alias But still no go on the other services from our internal network (or a netstat -a or a route) Any help is appreciated   Greg Caskey