similar to: newnotsyn question

Hello, I''ve been doing some tests on a firewall system running Shorewall 1.4, and have been getting some unexpected behavior when enabling the "newnotsyn" option. In the test setup, I have: ---------------------------------------- /etc/shorewall/interfaces net eth0 detect routefilter,tcpflags,blacklist loc eth1 10.0.0.255 dhcp,tcpflags,newnotsyn

Has anyone encountered a situation where packets dropped by the newnotsyn chain can result in sporadic browsing problems, slowness, and even timeouts? I noticed that of the 3300 hits for newnotsyn in our current log (6 hours worth), over 2700 of them were to/from our proxy servers. And browsing through them, most *appear* to be otherwise valid packets from remote web servers that would have

Hi, I'm trying to set up Icecast and Ices to stream from my sound card's line-in. I'm using ALSA. I'm experienced in Linux but haven't spent much time on multimedia and I'm new to streaming. Platform is Mandrake 10.1 with kernel held to 2.4. The sound card is working and I can record to file using sox. Ices and Icecast both start okay, and aren't logging any

http://shorewall.net/pub/shorewall/2.2-Beta/shorewall-2.2.0-RC3 ftp://shorewall.net/pub/shorewall/2.2-Beta/shorewall-2.2.0-RC3 Just a few bug fixes: * The following error message could appear during "shorewall stop" clear": local: lo:: bad variable name * * The rate limiting example in /etc/shorewall/rules has been changed to use the RATE

Hi, I have shorewall version 1.4.10g on Redhat 9 Local clients are on eth1 in subnet 192.168.3.0/24. eth0 is for the outside (over xdsl with includes a ppp0 interface). Nessus (nessusd) is installed *on the firewall* and managed trough nessus (the client or frontend) running on one of the internal machines. When I was running a scan against 194.152.181.36 I observed several entries like

Hi, I have a big "name problem" with my internal mail server (10.0.0.152). It is "seen" on the internet through DNAT (213.58.230.27). Also there is a MX record pointing to the machine. Everything works fine from the outside. However i can''t set the mail clients on the lan pointing to the mx record, because this one points to 213.58.230.27 and the firewall

Hi! Shorewall Users May I know ..what does it means ? Nov 5 12:43:34 netgw kernel: Shorewall:newnotsyn:DROP:IN=eth0 OUT= MAC=00:05:5d:4e:fc:62:00:d0:95:7a:d5:f1:08:00 SRC=210.59.230.239 DST=211.24.146.50 LEN=52 TOS=0x00 PREC=0x00 TTL=48 ID=36787 PROTO=TCP SPT=80 DPT=20291 WINDOW=65160 RES=0x00 ACK FIN URGP=0 Best Regards, Support

Problems Corrected: 1) A problem seen on RH7.3 systems where Shorewall encountered start errors when started using the "service" mechanism has been worked around. 2) A problem introduced in earlier snapshots has been corrected. This problem caused incorrect netfilter rules to be created when the destination zone in a rule was qualified by an address in CIDR format.

Hi Guys, I need some help. I''ve been using shorewall for a while now and it''s been running beautifully, but I''m now experiencing some problems. It seems that connections are getting dropped much like the behavior described by the NEWNOTSYN=no option in the shorewall.conf file, but I have NEWNOTSYN=Yes in my file. The messages I see in my logs are things like:

I''m attempting to setup Squid as shown on: http://shorewall.sourceforge.net/Shorewall_Squid_Usage.html#DMZ The firewall is a Bering 1.0 firewall running Shorewall 1.3.11, Red Hat 7.2 on the server in the DMZ. I''m not seeing the requests come in to the server using tcpdump. The server is 192.168.2.1 connecting to eth2 on the firewall, the local traffic I''m trying to

What''s the difference between a newnotsyn DROP and a blacklist DROP? Also, there''s a web site (SRC=62.193.203.132) that has been trying to connect to port 25 for a couple of weeks now. Is there a way to get someone upstream to add a block to that site for a small fish like me?

I''m building a 10 branch/1 headquarter network with Shorewall/Linux as gateway on all locations. The TI guy asked me if there is a way to ''cache'' TCP/UDP traffic between them. I crawled on Internet and I only find very expensive solutions for this. Some of them appeared in this comparison article: http://www.networkcomputing.com/showitem.jhtml?docid=1524f5 Does anyone

hi, we use openvpn as for our vpn endpoints and we''ve got about 70-80 vpn connections which means we have tun0 - tun80 interface. i''d like to define one zone for all of our vpn connections how can I do that? actualy our local zone is 192.168.0.0/17 (not 16) and all of the vpn''s are in 192.168.128.0/17. our should i define somehow the local zone as 192.168.0.0/16? but in

I have /bin/ash from rh8 installation and I have following error when I tried to change using ash instead of sh with shorewall-1.4.7: + eval options=$tap0_options + options= + list_search newnotsyn + local e=newnotsyn + [ 1 -gt 1 ] + return 1 + run_user_exit newnotsyn + find_file newnotsyn + [ -n -a -f /newnotsyn ] + echo /etc/shorewall/newnotsyn + local user_exit=/etc/shorewall/newnotsyn + [

I have had to replace an existing setup which has a bunch of IPs Proxy-NAT''ed onto the loc segment. While I do eventually want to move them to their own segment, I have to deal with this for the next few weeks. My problem is that from a loc system I can ping the public IP of a system being proxy-ARP''d but I can''t hit it via HTTP. Nothing is being blocked according

Hi, I''m using the same set of firewall rules of 2.0.x (sorry, I can''t remember the exact minor version) and put it to work with 2.0.9. And now I can''t do passive ftp (was working before). I see that my NEWNOTSYN is set to Yes, and the loc->net rule is blocking 1024:65535. But I believe with the ip_conntrack_ftp, the passive mode would be allowed, since

Hi, Also, does anyone have a recommendation for a reporting tool that shows bandwidth use, for each IP and each interface on a Shorewall FW? Tried BandwidthD, but couldn''t get it to compile on Mandrake10... NAAT might fit the bill - if it doesn''t mess-up my shorewall setup... Thanks for any suggestions, Richard.

The first Beta Version is available at: http://www.shorewall.net/pub/shorewall/Beta ftp://ftp.shorewall.net/pub/shorewall/Beta New features include: 1) "shorewall refresh" now reloads the traffic shaping rules (tcrules and tcstart). 2) "shorewall debug [re]start" now turns off debugging after an error occurs. This places the point of the failure near the end of the

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 \

Hello, I have this problem: when my mail server on the DMZ starts a connection to the internet it''s ip (213.58.230.26) is "masqueraded" with the firewall ip (213.58.230.50). I wouldn''t mind but there is a one customer who rejects the connection because it makes reverse dns and finds no dns entry for the firewall ip. How can i correct this? Thanks, MSantos shorewall