search for: br_netfilt

...ith an IP address 10.0.0.1. The local net connect to the internet via the gateway 10.0.0.1 and SNAT is applied on the firewall. It worked but sometimes there are some problems. The bridge stopped resonse now and there. When checking the log there were some messages as below, Mar 21 13:48:04 NPFW br_netfilter: Argh!! br_nf_post_routing: bad mac.raw pointer.[eth6][Bridge_0] Mar 21 13:48:04 NPFW br_netfilter: Argh!! br_nf_post_routing: bad mac.raw pointer.[eth5][Bridge_0] Mar 21 13:48:04 NPFW br_netfilter: Argh!! br_nf_post_routing: bad mac.raw pointer.[eth4][Bridge_0] Mar 21 13:48:04 NPFW br_netfilter:...

...TCH] [2.6.15.4] Fix has_bridge_parent undefined with CONFIG_NETFILTER_DEBUG This changes br_nf_post_routing to use realoutdev in debug print. At this time it is equal to bridge_parent and is guaranteed to be not NULL. Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru> - --- net/bridge/br_netfilter.c | 4 +--- 1 files changed, 1 insertions(+), 3 deletions(-) db15f4ffe50096ba1585cfa344a440626724cfda diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 0770664..37e085b 100644 - --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -793,9 +793,7 @@ static u...

Does someone have a link to a how-to-do-it with firewalld, not "disable firewalld and use iptables"? mark

...alled two VMs(Fedora and RHEL8) in Fedora where > > the VMs are having the same issue. > > > > I am happy to provide any logs or command output if that would help. > > Do you have "podman" installed on your host ? As there is an issue > with podman loading "br_netfilter" which is harming libvirt default > network traffic.. Hi, yes I am using podman for some development tasks. However I don't see any br_netfilter module loaded: # lsmod | grep br_netfilter # grep 'netfilter' /proc/modules I'm not sure if it matters but my host laptop i...

Hi, I recently installed a fresh install of Fedora 32 and I am having trouble with my virtual machine networking, I can ssh and connect into my guest VMs from my host, but the guest VMs cannot ping out to the internet. I am using the "default" NAT virtual network, the interesting thing is I have made no configuration changes on my host or in the guest VMs, simply created and installed

Hi all, The patch below does four trivial changes and one big change Trivial changes, these are all in br_netfilter.c: - check ar_pln==4 when giving bridged ARP packets to arptables - delete unnecessary if in br_nf_local_in - add more logging for the "Argh" message - add some brag-comments in the file head comment Big change: let {ip,arp}tables see VLAN tagged {I,AR}P packets. This patch also makes...

...etfilter code is nesting far too > > deeply and recursing several times. Looks like a design bug to me, > > it shouldn't do that. > > I don't think it's recursing -- I think the stack trace is just a bit > noisy. The problem is that the bridge code, especially with br_netfilter > in the equation, is implicated in code paths which are just _too_ deep. > This happens when you're bridging packets received in an interrupt while > you were deep in journalling code, and it's also been seen with a call > trace something like nfs->sunrpc->ip->bridge...

On 04/02/2016 05:20 PM, Laine Stump wrote: > You say they can talk among containers on the same host, and with their > own host (I guess you mean the virtual machine that is hosting the > containers), but not to containers on another host. Can the containers > communicate outside of the host at all? If not, perhaps the problem is > iptables rules for the bridge device the containers

Hello, I have a linux box sitting between (and bridging/firewalling) 2 LAN segments. I''m using Bridge/Netfilter/IMQ/tc(htb) to control (shape) mail/web traffic that traverses the 2 networks. The networks also have some VLAN tagged traffic flying around. My linux box behaves OK with VLAN traffic except that the shaping doesn''t seem to work. Normal http shapes alright but as soon

Hi, I found this block of code in br_dev_queue_xmit() @ br_forward.c, after applying 'netfilter' patch for 2.4.21 kernel Can someone explain what this block of code is doin? #ifdef CONFIG_NETFILTER if (skb->nf_bridge) memcpy(skb->data - 16, skb->nf_bridge->hh, 16); #endif 1. What is 16 bytes here...? Ethernet hdr is just 14 bytes 2. Why the ethernet

...see if the containers can now communicate with >> the outside: >> >> sysctl -w net.bridge.bridge-nf-call-iptables=0 > > This key doesn't exist in the CentOS 7 image I'm running. Interesting. That functionality was moved out of the kernel's bridge module into br_netfilter some time back, but that was done later than the kernel 3.10 that is used by CentOS 7. Are you running some later kernel version? If your kernel doesn't have a message in dmesg that looks like this: bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your...

Hi, I have 2 servers which are connected to a gateway machine. The gateway and one server are running Linux 2.6.16.2, while the third machine is running 2.6.16.5. The two ethernet ports on the gateway which are connected to the servers are combined into a single ethernet bridge device. Ever since 2.6.16, I have noticed that I can no longer cross-mount the two servers' /home directories via

...It crashed today morning. Hardware is a pretty ancient, testing machine (CO6 PV guests only), but had no problems yet. It was stable on 4.9*, including testing 4.9.15-22.el6.x86_64 Console output: [59826.069427] general protection fault: 0000 [#1] SMP [59826.069463] Modules linked in: xt_physdev br_netfilter xt_mac ebt_arp xen_pciback xen_gntalloc ebtable_filter ebtables bridge 8021q mrp garp stp llc xt_CT xt_addrtype iptable_raw nf_log_ ipv4 nf_log_common xt_LOG xt_limit xt_owner iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat ip6t_REJECT nf_reject_ipv6 nf_conntrack_ip...

...(offset 2 lines). patching file net/ipv4/netfilter/ipt_LOG.c Hunk #1 FAILED at 289. 1 out of 1 hunk FAILED -- saving rejects to file net/ipv4/netfilter/ipt_LOG.c.rej patching file net/ipv4/netfilter/Makefile patching file net/ipv4/netfilter/Config.in The next patch would create the file net/bridge/br_netfilter.c, which already exists! Assume -R? [n] n Apply anyway? [n] n Skipping patch. 1 out of 1 hunk ignored -- saving rejects to file net/bridge/br_netfilter.c.rej patching file net/ipv4/netfilter/ipt_physdev.c patching file include/linux/netfilter_ipv4/ipt_physdev.h patching file net/8021q/vlan_dev.c...

...(!nf_queue(*pskb, elem, pf, hook, indev, outdev, okfn)) goto next_hook; } - - switch (verdict) { - case NF_ACCEPT: - ret = okfn(skb); - break; - - case NF_DROP: - kfree_skb(skb); - ret = -EPERM; - break; - } - +unlock: rcu_read_unlock(); return ret; } --- linux-2.6.11-rc3/net/bridge/br_netfilter.c.old 2005-02-12 13:48:22.000000000 +0100 +++ linux-2.6.11-rc3/net/bridge/br_netfilter.c 2005-02-12 17:04:45.000000000 +0100 @@ -829,8 +829,7 @@ static unsigned int ip_sabotage_in(unsig { if ((*pskb)->nf_bridge && !((*pskb)->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTIN...

On 04/11/2016 11:33 AM, Laine Stump wrote: > Interesting. That functionality was moved out of the kernel's bridge > module into br_netfilter some time back, but that was done later than > the kernel 3.10 that is used by CentOS 7. Are you running some later > kernel version? > > If your kernel doesn't have a message in dmesg that looks like this: > > bridge: automatic filtering via arp/ip/ip6tables has been d...

...</rule> </filter> t simply doesn't work. The guest can talk to the other guests within the same subnet. All guests are connected to a bridge interface. The IP of the guest interface is defined in the guests' xml file. Is there any additional kernel module to load? The module br_netfilter is already loaded and /proc/sys/net/bridge/bridge-nf-call-iptables is set to 1. After hours of googling and testing I still couldn't find a solution. Please help! Thank you very much in advance Marc

...> simply created and installed two VMs(Fedora and RHEL8) in Fedora where > the VMs are having the same issue. > > I am happy to provide any logs or command output if that would help. Do you have "podman" installed on your host ? As there is an issue with podman loading "br_netfilter" which is harming libvirt default network traffic.. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagra...

Looks like the GSO is involved? I got this while running Dom0 only (no guests), with a BOINC/Rosetta@home application running on all 4 cores. changeset: 10649:8e55c5c11475 Build: x86_32p (pae). ------------[ cut here ]------------ kernel BUG at net/core/dev.c:1133! invalid opcode: 0000 [#1] SMP CPU: 0 EIP: 0061:[<c04dceb0>] Not tainted VLI EFLAGS: 00210297 (2.6.16.13-xen

...t). You can determine this by running: sysctl net.bridge.bridge-nf-call-iptables If it's set to 1, set it to 0 with: sysctl -w net.bridge.bridge-nf-call-iptables=0 (Note that as of kernel 3.17 filtering of packets on the bridge isn't on by default any more, and a new module called br_netfilter must be loaded for it to take place. So if your kernel is 3.17 or newer, this probably *isn't* your problem) 2) the switch connecting your host to the network only allows a single (or particular) mac address on the port used to connect the host. If this is the problem, then you'll need t...