Title: DNAT Post by: DrDamnit on Monday 14 December 2009, 11:05:22 am I created a port fowrad (DNAT) that just won't work for some reason.
Access from: Any Target Type: Any Uplink Filter Policy: ALLOW Service: User Defined, tcp 990 Translate to IP: 192.168.. DNAT Policy: DNAT Port Range {blank} Status: Enabled. grc.com sheilds up port scan says that this port is stealth. nmap from outside the network shows no response. and I cannot log into the FTPS server that is behind the firewall. This all used to work when I had EFW 2.x RC1. Upgraded, and have had problems ever since. What am I doing wrong? Title: Re: DNAT Post by: Ed34222 on Wednesday 31 March 2010, 03:05:13 am I created a port fowrad (DNAT) that just won't work for some reason. Access from: Any Target Type: Any Uplink Filter Policy: ALLOW Service: User Defined, tcp 990 Translate to IP: 192.168.. DNAT Policy: DNAT Port Range {blank} Status: Enabled. grc.com sheilds up port scan says that this port is stealth. nmap from outside the network shows no response. and I cannot log into the FTPS server that is behind the firewall. This all used to work when I had EFW 2.x RC1. Upgraded, and have had problems ever since. What am I doing wrong? EFW has a bad snort pre-proccessor rule that flags FTPS and FTPES as bad, and another one that bounces the packets instead of just giving a false positive warning. I have tried to override these entries in Snort.Conf; but, EFW puts them back whenever I restart the IPS. If anyone has another file or location I can used to set up an override for that pre-processor please let me know. The problem was documented in a snort forum post. The solution was to change the pre-processor settings for the FTP Encryption test from yes to no. To fix it, log into to your EFW using SSH, and modify /etc/snort/snort.conf.tmpl it looked like the following should have fixed it; but, it only turned of the warning: preprocessor ftp_telnet: global \ encrypted_traffic yes \ inspection_type stateful And change the yes to no. I don't know of my final solution was the best one or not; but, I remarked out all the ftp_telnet preprocessor lines and it worked. If anyone out there has a better solution - please let us know. Thanks; |