I'm still struggling with forwarding SMTP traffic across a VPN and into my LAN.
After a week+, I still can't get this working :-/
Monkeying aaround, I screwed up the VPN, too. That's been fixed for me, and
I'm restarting with a working VPN setup,
SERVER (shorewall)
eth0: S.S.S.S
192.168.0.1
tun1: 10.0.0.1
|
|
|
CLIENT (shorewall)
eth0: C.C.C.C
tun1: 10.0.0.2
eth1: 192.168.1.1
|
|
|
SMTP
eth0: 192.168.1.2
Connecting from SERVER's shell to the SMTP works,
telnet 192.168.1.2 25
Trying 192.168.1.2...
Connected to 192.168.1.2.
Escape character is '^]'.
220 smtp.mydomain.com ESMTP
But I can't to get to SMTP from 'outside'. From an external shell,
telnet S.S.S.S 25
Trying S.S.S.S...
telnet: Unable to connect to remote host: Connection timed out
The SERVER shorewall has
/zones
fw firewall
net ipv4
vpn1 ipv4
loc loopback
/interfaces
net eth0 tcpflags,nosmurfs,routefilter=1,sourceroute=0
vpn1 tun+ -
loc lo
/rules
DNAT net $FW:192.168.1.2 tcp 25 -
S.S.S.S
ACCEPT net vpn1:192.168.1.2 tcp 25
and the CLIENT shorewall has
/zones
fw firewall
net ipv4
lan ipv4
loc loopback
vpn1 ipv4
/interfaces
net eth0
tcpflags,nosmurfs,logmartians=1,routefilter=1,sourceroute=0
lan eth1 routefilter=1
vpn1 tun+ -
loc lo
/rules
ACCEPT vpn1 lan:192.168.1.2 tcp 25
/masq
eth0 192.168.1.2 S.S.S.S tcp 25
I'm well aware that my setup does not work, and that it's probably flat out
wrong. I'm just posting the state it's in right now. There is no "why" as to
what I'm doing. I don't know anymore and am reduced to just changing & trying
things randomly.
I'd appreciate a hand -- getting this working and understanding what's going on.
What shorewall configs do I need so that `telnet S.S.S.S 25` from the external
net will get a response from SMTP ?
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