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Iphone (apple Devices) and Port Flooding Issue
Posted: 06 Jan 2012, 13:51
by pewebhost
I'm running into an issue with IP's getting blocked for Port Flooding. Most specifically, Whenever I have an Iphone try and configure an email account, they will be blocked for port scanning.
Do I have something set wrong?
Any ideas on optimizing these settings to stop this behavior.
Thanks,
Cliff
Re: Iphone (apple Devices) and Port Flooding Issue
Posted: 08 Jan 2012, 17:26
by Sergio
pewebhost wrote:I'm running into an issue with IP's getting blocked for Port Flooding. Most specifically, Whenever I have an Iphone try and configure an email account, they will be blocked for port scanning.
Do I have something set wrong?
Any ideas on optimizing these settings to stop this behavior.
Thanks,
Cliff
Have you seen if the error is because of that devices check for por 587? If so, I recommend you to read
http://forums.cpanel.net/f43/smtp-port-587-a-74191.html
Sergio
Re: Iphone (apple Devices) and Port Flooding Issue
Posted: 09 Jan 2012, 15:58
by pewebhost
Thank You, I believe port 587 was this issue. I opened up that port in the firewall and started SMTP on that port and all seems to be well now.
Cliff
Re: Iphone (apple Devices) and Port Flooding Issue
Posted: 03 Dec 2013, 10:23
by oldlock
I'm having the same problem with iphones. 587 is open and setup for SMTP and I keep getting stuff like :
Sample of block hits:
Dec 3 17:45:42 server kernel: [11962479.342196] Firewall: *TCP_IN Blocked* IN=venet0 OUT= MAC= SRC=***.68.137.216 DST=***.167.46.*** LEN=52 TOS=0x00 PREC=0x00 TTL=117 ID=5550 DF PROTO=TCP SPT=49554 DPT=587 WINDOW=8192 RES=0x00 SYN URGP=0
Dec 3 17:45:45 server kernel: [11962482.342679] Firewall: *TCP_IN Blocked* IN=venet0 OUT= MAC= SRC=***.68.137.216 DST=***.167.46.*** LEN=52 TOS=0x00 PREC=0x00 TTL=117 ID=5557 DF PROTO=TCP SPT=49554 DPT=587 WINDOW=8192 RES=0x00 SYN URGP=0
I've edited some parts of ip's out.
Any suggestions as to how to resolve or get CSF / LFD to ignore it ?
Re: Iphone (apple Devices) and Port Flooding Issue
Posted: 11 Dec 2013, 06:57
by Sergio
oldblock,
check if port 587 is in your TCP/IN definition.
Sergio
Re: Iphone (apple Devices) and Port Flooding Issue
Posted: 20 Dec 2013, 21:43
by oldlock
Sorry for the delay in replying, I only just saw the message. YES ! that worked perfectly. Thank you. Perhaps that port should be a default setting these days given the prevalence of the iphone ?
Re: Iphone (apple Devices) and Port Flooding Issue
Posted: 28 Jan 2015, 16:01
by silver_2000
Ive had the same issue with Mac users getting blocked by LFD
no idea why 587 wasn't already in the list but thanks for this and hope it helps