Hi, I'm having strange problems with smtp port 25 and it's not always reproducible.
In the steps below, the shorewall gateway is in "multi-ISP mode" and 85.48.225.159, 85.48.225.241 belong to the same ADSL provider while 213.96.91.201 belongs to another ISP. Basically, what I'm trying to do is access a DNAT'ed email server from a remote host. Doing it through one public IP works; all other fail. Also note that this only happens with port 25. All other protocols work fine (HTTP, HTTPS, RDP, SSH, ICMP, etc.) over any public IP of both providers (2 provider companies, 3 ADSL lines). At first I thought it could be that one provider is blocking incoming SMTP (as outgoing SMTP always works) but then I found that the other provider (corresponding to 85.48.225.159) also "fails". [ on shorewall gateway ] # shorewall reset Shorewall Counters Reset [ on remote host 80.35.100.39 ] # telnet 213.96.91.201 25 Trying 213.96.91.201... telnet: Unable to connect to remote host: No route to host # telnet 85.48.225.241 25 Trying 85.48.225.241... Connected to 85.48.225.241. Escape character is '^]'. [ ... ] # telnet 85.48.225.159 25 Trying 85.48.225.159... [ endless wait so I press CTRL + C ] [ on shorewall gateway ] # shorewall dump > status.txt # bzip2 status.txt I'd appreciate it if you could take a look at the dump which is available at http://80.35.100.39/shorewall/ As far as reproducibility is concerned, I noted that *most* of the time it's just as above. However, I did notice that occasionally both telnet 85.48.225.159 25 and telnet 213.96.91.201 25 *do* connect. Any ideas as to what I could try to understand what is happening? ____________________________________________________________________________________ Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games. http://games.yahoo.com/games/front ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Shorewall-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/shorewall-users
