similar to: Migration and arp cache problem

>From http://shorewall.net/ProxyARP.htm (and the Setup Guide): > A word of warning is in order here. ISPs typically configure their > routers with a long ARP cache timeout. If you move a system from > parallel to your firewall to behind your firewall with Proxy ARP, it > will probably be HOURS before that system can communicate with the > internet. You can call your ISP and ask

Hello! I''ve noticed a strange thing: when a client system generates an arp query for an unexistent host, the routing cache entry is being made. My system is Fedora 2 with vanilla 2.6.11. the client is 10.1.1.2 with mask 255.255.0.0 the router/firewall is 10.1.1.1 with mask 255.255.255.0 Yes, the masks are different and this cannot be fixed easily. So, when the client generates ARP

we plan to change network switch and firewall machine to new one. Network engineer told me after switch and firewall equipment change I may need run 'arp ..." to clear out cache on every CENTOS servers due to switch and firewall MAC address change. we have 30 to 40 CENTOS 4.X and 5.X my affect. my question are: 1. does switch and firewall equipment change need LINUX client clear

Hi Richard, >Load balancers have some added value, but those that have had to deal >with a problem where a single system within the cluster is up but not >processing data would probably argue their actual value. I've done quite a lot of work with clustered/ha linux configurations. I usualy try to keep additional boxes/hardware to an absolute minimum, otherwise the newly introduced

Hello, all. When I execute arp -a -n, there are lots of arp caches like below. Surely, I set netmask and Broadcast without problem and routing table also no problem. System is CentOS release 4.7 i386. I know how to delete the arp cache, but I don't know why .. # ifconfig eth0 Link encap:Ethernet HWaddr 00:A0:D1:E7:91:CC inet addr:192.168.195.36

Hello, My apologies if this isn''t the right place to send questions about this thread. I have a couple one''s about proxy_arp and gratuitous arp reply frames. I have setup the proxy_arp parameter on a linux system (kernel 2.4.20). Now, when I start a M$-Windoze machine it complain about "...duplicated IP address...". This is a know behaviour, and the solution is

Of course you should patch/upgrade, etc. A stopgap measure could be to use static ARP for a segment. I have done this for a long time with wireless hosts, since I'm in an urban environment with many visible nodes, some in autos, and ARP cache poisoning is a well-known DoS against wireless. You may find it extremely painful and less-than-useful to have static IP addrs, etc. for hosts.

http://bugzilla.mindrot.org/show_bug.cgi?id=449 Summary: ssh_prng_cmds has malformed arp command Product: Portable OpenSSH Version: 3.4p1 Platform: Sparc OS/Version: Solaris Status: NEW Severity: major Priority: P2 Component: sshd AssignedTo: openssh-unix-dev at mindrot.org ReportedBy:

On Fri, Sep 27, 2002 at 05:00:35PM +0200, Steve wrote: > check you network, sounds like a hardware problem. > ARP is the Address Resolution Protocol and is a low level ethernet protocol. > > check this site out for more info > http://whatis.techtarget.com/definition/0,,sid9_gci213780,00.html > > Thanks for the comment. I got the same error (PXE E11 ARP timeout) with two

http://bugzilla.mindrot.org/show_bug.cgi?id=323 Summary: arp -n flag doesn't exist under Solaris, ssh_prng_cmds still uses it Product: Portable OpenSSH Version: -current Platform: All OS/Version: Solaris Status: NEW Severity: normal Priority: P2 Component: Build system

2014-02-26 15:10 GMT+01:00 Laine Stump <laine@laine.org>: > On 02/26/2014 02:56 PM, Michal Privoznik wrote: > > On 25.02.2014 22:45, François Chenais wrote: > >> Hello > >> > >> I'm trying to setup a bridged guest on an ubuntu 13.10 but it doesn't > >> work. > >> > >> (Everything is ok with NAT) > >> >

I am attempting to discern the efficacy of controlling or filtering ARP (gateway/client) to mitigate unauthorized connections to wifi networks. As such, I am aware that EAP was originally devised to allow for: " the negotiation of an authentication protocol for authenticating its peers BEFORE allowing network layer protocols to transmit over the link" (RFC2284) However, this

Hi all. I experienced a strange behaviour in the "arp" command when I use the "pub" (publishing) flag. This is the scenario (I know it''s an unusual one, but it''s just for a test): __________ | | | host C | | | |__________| | __________|________________________________

https://bugzilla.netfilter.org/show_bug.cgi?id=1155 Bug ID: 1155 Summary: arp forward filter doesn't work Product: nftables Version: unspecified Hardware: x86_64 OS: All Status: NEW Severity: normal Priority: P5 Component: kernel Assignee: pablo at netfilter.org

Hello - Was wondering if anyone is running the bonding network driver in active/backup mode using arp_validate? I'm trying to deal with really crappy network switches from Dell and I thought I could work around their faults in the short term by switching from link monitoring to arp monitoring. But I ran into a situation just now that seems even arp monitoring isn't enough. This is my

I want only to ignore the arp request for alias ip ,at the same time I don't want disable the arp function of the interface ? How do ? thanks! --------------------------------- DO YOU YAHOO!? ÑÅ»¢Ãâ·ÑGÓÊÏ䣭ÖйúµÚÒ»¾øÎÞÀ¬»øÓʼþɧÈų¬´óÓÊÏä From vova at fbsd.ru Fri Jul 1 13:12:10 2005 From: vova at fbsd.ru (Vladimir Grebenschikov) Date: Fri Jul 1 13:12:12 2005 Subject: how to ignore

https://bugzilla.netfilter.org/show_bug.cgi?id=956 Summary: ARP operation is listed in network byte order Product: nftables Version: unspecified Platform: x86_64 OS/Version: All Status: NEW Severity: enhancement Priority: P5 Component: nft AssignedTo: pablo at netfilter.org ReportedBy:

I don''t know if there was a problem in the archive or not, I just wanted to link to this post of mine, but I could not find it in the archive. So here''s a re-post. -------- Original-Nachricht -------- Betreff: [Xen-users] Xen, NIC bonding, ARP problem Datum: Fri, 30 Mar 2007 10:05:45 +0200 Von: Dominik Klein <dk@in-telegence.net> An: xen-users@lists.xensource.com Hi

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-03:14.arp Security Advisory The FreeBSD Project Topic: denial of service due to ARP resource starvation Category: core Module: sys Announced:

Hello I'm trying to setup a bridged guest on an ubuntu 13.10 but it doesn't work. (Everything is ok with NAT) Network sniffing shows that arp replies don't come back to the guest. Test 1 ------ Guest : ping host_bridge_ip (ok) Test 2 ------ Guest: ping other_lan_host (KO) other_lan_host - receives arp who-is request - sends arp reply