Hello again Jerahmy,

I would suggest that you verify what port(s) and protocol(s) 'Sonic Wall Global VPN Client' needs to work.


I would also suggest that you look in the logfile from ipf to see what it's blocking and when.

My guess is that the VPN client is using a protocol like IPSEC (IP protocol 50) and possibly port 500 (IKE) for which you will have to activate the ipnat proxy.

map WAN internal_ip/24 -> 0.0.0.0/32 proxy port 500 ipsec/udp

You might also try to disable the blocking of fragged packets. For some VPN clients this can cause problems.

Good luck!

/Roger



Jerahmy Pocott skrev:
Sorry let me clarify..

There are two issues, one is connecting to any external VPN, with no filter I can establish a connection to PPTP VPN, but the 'Sonic Wall Global VPN Client'
still fails to connect even with no filter rules.

The redirect for the CVS server has an ipf rule to allow traffic on that port, but
users are getting connection refused messages.

I will include my ipf rules, I clearly need some sort of rule to allow inbound for the VPN to work, though I think the ipnat is breaking the Sonic Wall client. Which
is strange because everything worked fine with ipfw/natd.

Here are my ipf rules:

# Allow all in/out on internel interface
pass in  quick on fxp0 all
pass out quick on fxp0 all

# Allow all in/out on loopback interface
pass in  quick on lo0 all
pass out quick on lo0 all

# Allow all out-going on public interface and keep state
pass out quick on fxp1 proto tcp  from any to any flags S keep state
pass out quick on fxp1 proto udp  from any to any keep state
pass out quick on fxp1 proto icmp from any to any keep state

# Block all inbound traffic from non-routable or reserved address spaces
block in quick on fxp1 from 192.168.0.0/16 to any    #RFC 1918 private IP
block in quick on fxp1 from 172.16.0.0/12 to any     #RFC 1918 private IP
block in quick on fxp1 from 10.0.0.0/8 to any        #RFC 1918 private IP
block in quick on fxp1 from 127.0.0.0/8 to any       #loopback
block in quick on fxp1 from 0.0.0.0/8 to any         #loopback
block in quick on fxp1 from 169.254.0.0/16 to any    #DHCP auto-config
block in quick on fxp1 from 192.0.2.0/24 to any      #reserved for docs
block in quick on fxp1 from 204.152.64.0/23 to any #Sun cluster interconnect
block in quick on fxp1 from 224.0.0.0/3 to any       #Class D & E multicast
# Block frags
block in quick on fxp1 all with frags
# Block short tcp packets
block in quick on fxp1 proto tcp all with short
# block source routed packets
block in quick on fxp1 all with opt lsrr
block in quick on fxp1 all with opt ssrr
# Block anything with special options
block in quick on fxp1 all with ipopts
# Block public pings
block in quick on fxp1 proto icmp all icmp-type 8
# Block ident
block in quick on fxp1 proto tcp from any to any port = 113
# Block all Netbios service. 137=name, 138=datagram, 139=session
# Block MS/Windows hosts2 name server requests 81
block in quick on fxp1 proto tcp/udp from any to any port = 137
block in quick on fxp1 proto tcp/udp from any to any port = 138
block in quick on fxp1 proto tcp/udp from any to any port = 139
block in quick on fxp1 proto tcp/udp from any to any port = 81

# Allow CVS access
pass in quick on fxp1 proto tcp/udp from any to any port = 2401

# Logged Blocking Rules #

# Block nmap OS fingerprint attempts
block in log first quick on fxp1 proto tcp from any to any flags FUP

# Block all other in coming traffic
block in log first quick on fxp1 all

Thanks for the help!
J.

On 25/11/2007, at 12:50 AM, Roger Olofsson wrote:

Hello Jerahmy,

Assuming you want to connect from the outside to your VPN.

Have you made sure that port 2401 is open for inbound traffic in your ipf.rules?

You might also want to do 'ipnat -C -f <path to ipnat.rules>'. Man ipnat ;^)

Greeting from Sweden
/Roger



Jerahmy Pocott skrev:
Hello,
I recently decided to give ipf and ipnat a try, previously I had always been using ipfw and natd. Since switching over I can no longer establish a VPN tunnel from
any system behind the gateway.
I did 'ipf -F a' to flush all rules but I was still unable to connect so I think it's a problem
with ipnat? Also my redirect from ipnat doesn't seem to work either.
These are the only ipnat rules I have:
(fxp1 is the external interface)
# ipnat built in ftp proxy rules
map fxp1 10.0.0.0/24 -> 0/32 proxy port 21 ftp/tcp
map fxp1 0.0.0.0/0   -> 0/32 proxy port 21 ftp/tcp
# CVS Server on Fileserv
rdr fxp1 0/32 port 2401 -> 10.0.0.2 port 2401 tcp/udp
# nat all out going traffic on fxp1 from internal lan
map fxp1 10.0.0.0/24 -> 0/32
I can post my firewall rules too if that would help, however with NO rules set it still didn't work so I don't think that would help.. (I'm using the klm which is default
to accept?)
Thanks!
J.
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