Unable to change TTL on TEW-824DRU

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Pukeolicious
DD-WRT Novice


Joined: 08 Nov 2009
Posts: 6
PostPosted: Fri May 20, 2016 20:33    Post subject: Unable to change TTL on TEW-824DRU Reply with quote
Brand new Trendnet TEW-824DRU. I installed the DD-WRT image from the Trendnet site which was v3.0 r27722. I am currently running r27745. Upgraded trying to get TTL modification to work.

My ISP blocks routers by setting TTL to 1. I am trying to increase the TTL counter prior to routing.

Ifconfig shows eth0 as my WAN interface, so, based on the Wiki, this command should work:

iptables -t mangle -I PREROUTING -i eth0 -j TTL --ttl-set 10

Running pings after applying the command shows the TTL is still set to 1. All of this is from a telnet session in the router.

What am I missing?
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Pukeolicious
DD-WRT Novice


Joined: 08 Nov 2009
Posts: 6
PostPosted: Sat May 21, 2016 20:17    Post subject: Reply with quote
To add more to the subject as I continue to struggle:

It appears my commands aren't being accepted, although I don't receive an error message. Here is the result of running "iptables -t mangle -L --line-numbers" after adding the change.

Code:
root@DD-WRT:~# iptables -t mangle -I PREROUTING -i 'get_wanface' -j TTL --ttl-set 10
root@DD-WRT:~# iptables -t mangle -L
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         
MARK       0    --  anywhere             10.159.1.72          MARK or 0x80000000
CONNMARK   0    --  anywhere             anywhere            CONNMARK save 

Chain INPUT (policy ACCEPT)


The line is not inserted. Nothing changes, but I don't receive an error. I could really use some help here.
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Pukeolicious
DD-WRT Novice


Joined: 08 Nov 2009
Posts: 6
PostPosted: Sat May 28, 2016 18:10    Post subject: Reply with quote
Apparently nobody has seen this issue?

I've tried using /h for help but don't see a problem with my commands.
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jwoods
DD-WRT User


Joined: 13 Mar 2016
Posts: 403
PostPosted: Sat May 28, 2016 20:03    Post subject: Reply with quote
I would start by flashing with the latest version of the firmware...

ftp://ftp.dd-wrt.com/betas/2016/05-19-2016-r29739/

and go from there.
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