Recent Questions

My Postfix server was working fine until last days but now, I can't receive emails from outside (I mean with an email of different domain name like gmail for example). I must make notice that I can send email from the server to gmail. From what I have seen, I think that issue may be my iptables rules : # iptables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt...

I want to create an Outlook mail rule for every company that I deal with so that @xyzcompany.com goes to xyz company folder and @abccompany.com goes to abcompany etc.. without creating a rule for each one. It would have to create folders for new companies that I haven't dealt with. If anyone has any ideas I would be most grateful. Let's block ads! بخوانید...

I spend two days trying to compile my code with header as cross compiler for OpenWrt I am using LinksysWRT54GL, and mipsel architecture. I download the libpcap from OpenWrt and tried to generate the MakeFile using ./configure --prefix=$TOOLCHAIN --build=mipsel-openwrt-linux-gnu --host=mipsel-openwrt-linux-uclibc --with-pcap=null and I got this error when I ran make pcap-usb-linux.o: could not read symbols: File in wrong format collect2: ld retued 1 exit status make: *** [libpcap.so] Error 1 Thans for all Let's block ads! بخوانید...

I'm struggling to understand a behavior I can't explain in a sample network. Basically I want to be able to switch some of my servers by redirecting to a different server (so that I can point my applications to some database server for example and then switch the database coections to another server without changing the applications). I'm probably going to use something like rinetd for that, but I'm curious why some iptables rules are not working as I would expect. The sample network had 3 servers: gw (192.168.0.1/24), s1 (192.168.0.2/24) and s2 (192.168.0.3/24). gw is the default gateway for s1 and s2. Then I set up in gw's PREROUTING in the nat table to redirect traffic to 192.168.1.1:5432...

Please redirect me if I'm posting this question in the wrong place. Background: I'm currently ruing DD-WRT v3.0-r29519 std (04/25/16) on my TP-Link Archer AC1750. For QoS, I have HTP scheduling set up with a very simple set of rules defined in the DD-WRT GUI at */QoS.asp. I've searched through dozens of DD-WRT forum entries to try and understand this code, per the DD-WRT wiki page 1 17 * * * root /usr/sbin/svqos `nvram get wshaper_downlink` `nvram get wshaper_uplink` `get_wanface` `nvram get wan_mtu` 0 */6 1-17 * * * root /usr/sbin/svqos stop 0 `get_wanface` 0 0 I would like to enable my GUI-set QoS settings from 12 PM to 5 AM, and my guess is that the code would look like this 1 00 * * ...

Typically I'm using MikroTik embeded routers, they're basing on Linux so their firewall settings feel pretty much 1:1 the same as iptables, just commands are a bit different but mechanics the same. Some more advance MTK firewall functionality with raw iptables can be achieved using -m extensions - like coection states or comments for example. I can't find disable option in raw iptables. Is there any iptables extension that allows to temporarily disable iptables rules? By temporarily I mean disabling rule without actually removing it from table so that it's still visible in iptables -L but not functional. In MTK you can type something like set 40 disabled=yes and then later set 40 disabled=no...

My server is under attacked by exim brute force with a fake ip: 2014-05-31 16:05:09 login authenticator failed for ([my_public_ip]) [178.41.179.50]: 535 Incorrect authentication data (set_id=grey) I have some rules to block the origin 178.41.179.50 ip but no success. I try to block the incoming traffic with fake source with my public ip like this: iptables -A INPUT -i eth0 -s my_public_ip -j DROP But it seem take resolve my public ip to DNS instead.So it does not work. Any help ? Let's block ads! بخوانید...

I'm using httpd service on linux os. My result of iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination DROP tcp -- anywhere anywhere state NEW tcp dpt:http recent: UPDATE seconds: 10 hit_count: 3 name: http_flood side: source tcp -- anywhere anywhere state NEW tcp dpt:http recent: SET name: http_flood side: source DROP all -- 185.103.253.167 anywhere DROP all -- 185.130.4.197 anywhere DROP all -- 185.130.4.120 anywhere syn_flood tcp -- anywhere anywhere tcp flags:FIN,SYN,...

I have configured my Linksys E2000 Router as a switch via dd-wrt. Devices coected by LAN: Samsung Smart TV ISP provided IPTV device Cable going to my actual Router (ISP provided, also the DHCP server) WiFi is in AP mode (bridged, with WPA2 security), it should provide access to the inteet over the ISP Router. I have tued DHCP completely off in dd-wrt. Problem is, WiFi works great - for about 5 minutes or until I do an ipconfig /renew, then it crashes (no device can coect, existing device slowly discoect, Inteet stops working immediately) and only fixes itself after I reboot the router. I have also tried DHCP forwarder mode. Sadly, I can't tu off DHCP on my ISP router... And BTW, is there a w...

I have Office 2013 on my work computer and Office 2016 on my personal computer. On my work computer in Excel 2013 when you type a formula you get the suggested syntax for formulas as you type, but on my personal computer I am not getting this. On my work computer, for example, if I type the SUM formula I will see the suggestion: SUM(number1, [number2], ...) but I won't get this syntax suggestion for my personal computer (all I get is SUM) Is this just the version of Excel that I have on the different computers or is there a setting that I can tu on to show syntax suggestions? Thanks for the help. Let's block ads! بخوانید...

I know that sounds strange. Here's some background: OpenWRT - how to do initial login (ssh) if 192.168.1.1 can't be routed? Essentially, I flashed openWRT and the normal boot mode is broken. I have a working configuration in failsafe mode, as well as a lot of additional configuration that I've done. For whatever reason, when I'm in failsafe mode, my changes persist. If I reboot, it boots the normal mode, which fails and hangs. Status light never changes, Etheet ports never get power (judging by their LEDs), nothing occurs over the ports, no ping, no ssh etc. I have to cut power 3-5 times every time I reboot, until it reboots back to failsafe, with all my changes that I've made still there. I...

I am on Ubuntu 16.04 creating OpenWRT image by OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64.tar.bz2 from https://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/. I have all exactly done by https://wiki.openwrt.org/doc/howto/obtain.firmware.generate tutorial but it does not works. make image PROFILE=TLWR541 starts outputting some commands and outputs of some commands but nothing more. After 10 minutes of nothing I pressed Ctrl + C to stop output. All output was root@test:~/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64# make image PROFILE=TLWR841 make[1]: Entering directory '/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64' echo 'Building images for ar71xx - TP...