similar to: Is there any merit in making a start/restart conditional upon a successful check?

This is some ramblings on why using proxy ARP (on a host in a DMZ) is a good or bad thing. The good is that a computer X retains a public IP address which makes it easy to connect it directly to the net if the firewall has to be taken down for extended periods. Thus, if computer X is a mail server for example, it can still function in a reduced capacity until the firewall is restored. The bad

The problem scenario I describe was reported previously in the Shorewall lists but its resolution does not seem to have made it into the lists. Scenario: Windows XP client seeking to establish a VPN connection to a Windows 2003 Server located behind a Shorewall firewall (running on Mandrake kernel 2.4.22-37mdk). The connection cannot be made, the client reports error code 721. Discussion:

On the firewall, what is the rationale for giving eth1 an IP address that is also assigned eto eth0? (Rather than a private one.) -- Taso Hatzi caesar 17 <<-salad cjbx jc vdwwjar jc xi jc jd salad

There has been a low continuing level of confusion over the terms "Source NAT" (SNAT) and "Static NAT". To avoid future confusion, all instances of "Static NAT" have been replaced with "One-to-one NAT" on the web site and in the CVS configuration files (Shorewall/ project). The documentation in 1.4.9 will also contain this change. -Tom -- Tom Eastep \

Are there any scenarios that require traffic from a zone to itself to be blocked? If not, Shorewall should possibly allow it as a matter of course. It seems strange having to explicitly create such a policy & it''s not immediately obvious when it is required. -- Taso Hatzi caesar 17 <<-salad cjbx jc vdwwjar jc xi jc jd salad

I don''t think this has anything to do with Shorewall but I am not too familiar with iptables stuff yet so I''m not sure. Running Shorewall shorewall-1.4.9 on Mandrake Linux release 9.2 (FiveStar) for i586 Kernel 2.4.22-37mdk. Run "nmap -sP 192.168.x.x/24" (for example), where 192.168.x.x/24 is the LAN. You can do this from a firewall/router, or even from a

Tomorrow morning, the following systems will be unavailable while I upgrade the OS on my firewall: a) shorewall.net b) lists.shorewall.net c) cvs.shorewall.net d) rsync.shorewall.net The upgrade will begin around 0700 PST (-0800) and will like take two hours or so. Sorry for the inconvenience. -Tom -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \

Hello, I''m stuck IPSECing my wireless network at home and would appreciate any comments. I appologize in advance if I''m wasting your time with trivia - I''m not a professional and staring at the problem for days from various angles hasn''t done me any good ... My home server/firewall (morannon) is hooked up through an USB to ethernet adapter (eth1) to my DSL

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The server rebuild was a complete failure. For some reason, neither FC3 nor SuSE 9.2 like the graphics card in the box. I have reinstalled the old hard drive and the server is back on line. - -Tom - -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \ http://shorewall.net Washington USA \ teastep@shorewall.net

Hey gang, I was wondering if all that documentation could or has been put into PDF format. I usually like to download documentation and read it while I''m sitting comfortably at home and I don''t want to tie up the phone line all night. Thanks, Nino p.s. If so, please feel free to attach the PDF formatted document to my e-mail ;-)

Hi all! I''ve set up a Linux box with shorewall doing proxy arp as per http://www.shorewall.net/shorewall_setup_guide.htm#ProxyARP the 5.2 (non routed) example. Everything is working great except for one thing, and that leads me to my question: is there a conflict between proxy arp and pptp? I''ve set the apropriate ACCEPT rules to allow tcp port 1723 and protocol 47 to the host

The ''firewall'' script currently in the /Shorewall CVS project: a) Is approximately 15% faster starting/restarting on my configuration -- please report your experiences with it. b) Reloads Traffic Control/Shaping as part of "shorewall refresh" c) Turns off the shell trace after an error has occured (except when the command being traced is "stop" or

Hi, I''ve installed Emule (p2p program) on my client box but I can''t access the servers due to the firewall. I''m getting this blocking errors: Jan 22 01:26:07 servidor kernel: Shorewall:net2all:DROP:IN=eth1 OUT=eth0 SRC=213.22.49.86 DST=192.168.0.3 LEN=60 TOS=0x00 PREC=0x00 TTL=57 ID=50538 DF PROTO=TCP SPT=46408 DPT=4662 WINDOW=5840 RES=0x00 SYN URGP=0 My rules file

I''ve got shorewall installed on Mandrake 9.0 As I boot my computer ( single workstation ) I do not get any connection to the net before doing; shorewall stop, shorewall clear, shorewall restart. Only after giving those three instructions everything is normal. Is there an easy way fixing this ? Or else how can I prevent shorewall starting-up at boot, in order to start it manualy once the

Hi! I have a Linux shorewall firewall that is the default gw of the network. I want to redirect all localy originating traffic to port 80 into another machine on port 8002 into the local network. This machine is a WIN2000 machine running a commercial software (proxy, content filtering) that only runs into Windows... :-( I tried something like this but this doesn''t seem to work: local

Hi, I''ve got a question about how to configure the shorewall, and maybe someone could answer. I have a PC with 3 ethernet. The eth0 connets to internet. The eth1 connects to LAN A, and the eth2 connects to LAN B. I''ve configured the shorewall for doing NAT, and both LANs can navigate, but it seems that from a LAN A host you can connect to a PC of LAN B, and the other way

Rafa³ Dutko has just discovered a potentially serious bug in version 1.3.0 and 1.3.1. In both versions, where an interface option appears on multiple interfaces, the option may only be applied to the first interface on which it appears. A corrected firewall script for 1.3.1 is available at: http://www.shorewall.net/pub/shorewall/errata/1.3.1/firewall and

Hi, I installed the shorewall 1.3.8-2 debian package to my debian testing machine which serves as the gateway to the internet. Since I have two other machine connect to internet thru this gateway machine, I also downloaded the configuration guide for "basic two-interface firewall" and followed the instructions. When I try to start the shorewall I get the following message and can not

The ''firewall'' and ''functions'' file in CVS together produce a 30%+ speedup of ''shorewall restart'' on my firewall when compared to 1.3.11a. Please test with these files -- I don''t anticipate making any more performance changes for 1.3.12 and I want to be sure that I didn''t break anything. -Tom -- Tom Eastep \ Shorewall

Hello, on my old system I''m using ipchains. Can anyone help me with converting rule /sbin/ipchains -A forward -j MASQ -s source_addr -d destination_addr 443 -p tcp to shorewall. I know that I can write eth0 source_addr to /etc/shorewall/masq file but I can''t found where I can specify the destination address. The reason for this is to allow one user (computer) access only to